What is an Organic Solar Cell?

Detailed explanation of the characteristics and structural principles of organic solar cells

Organic solar cells are solar cells that consist of organic materials at the core. It is mainly based on organic materials with photosensitive properties as semiconductor materials, and the photovoltaic effect generates voltage to form a current to achieve the effect of solar power generation.

Custom Solar Panels

First, the characteristics of organic solar cells

As a new type of solar cell device, organic solar cells have the characteristics of flexibility, light weight, adjustable color, solution processing, and large-area printing preparation. They are currently a hot spot in the field of solar cell research. But low efficiency is the main reason that limits its large-scale application.

Second, the structural principle of organic solar cells

1. The principle of organic solar cells

Organic solar cells use photosensitive organics as semiconductor materials, and generate voltages to form currents by the photovoltaic effect. The main photosensitive organic materials have conjugated structure and conductivity, such as phthalocyanine compounds, porphyrins, cyanines, etc.

2. Several structures of organic solar cells

Organic solar cells can be divided into single junction structure, P-N heterojunction structure, and dye-sensitized nanocrystalline structure according to semiconductor materials.

3. Single junction structure

The single-junction structure is an organic solar cell made based on the principle of Schottty barrier. Its structure is glass/metal electrode/dye/metal electrode, which uses the different work functions of the two electrodes to generate an electric field. Electrons are transferred from the metal electrode with low work function to the electrode with high work function to generate photocurrent. Since electrons and holes are all transferred in the same material, the photoelectric conversion rate is relatively low.

4. P-N heterojunction structure P-N

The heterojunction structure refers to a heterojunction structure with a donor-acceptor (N-type semiconductor and P-type semiconductor). Among them, semiconductor materials are mostly dyes, such as phthalocyanine compounds and perylene tetraformaldehyde imine compounds, using the D/A interface (Donor—donor, Acceptor—acceptor) and electron-hole separation between semiconductor layers. The transfer characteristics in different materials increase the separation efficiency. Elias Stathatos and others combined the advantages of inorganic and organic compounds to make solar cells with a photoelectric conversion rate of 5% to 6%.

5. NPC (nanocrystaline photovoltaic cell) dye-sensitized nanocrystals

Dye-sensitized solar cell (DSSC) mainly refers to a type of solar cell that uses dye-sensitized porous nanostructured TiO2 film as the photoanode. It is a solar cell that mimics the photosynthesis principle of plant chlorophyll. However, NPC solar cells can choose appropriate redox electrolytes to increase the photoelectric efficiency, which can generally be stabilized at 10%, and nanocrystalline TiO2 is easy to prepare, low in cost, and has a considerable life span, which has a good market prospect.

Posted by Carrie Wong | WSL Solar Co., Ltd.

WSL Solar has been a quality and professional manufacturer of custom solar panels and solar solution provider in China since 2006.


Custom Solar Panel, 10W 3V

WSL Solar’s 3V 10W solar panel is built with the latest PERC monocrystalline solar cell. It is laminated by tempered glass, which is durable and robust. This custom solar panel is ideal for use in off grid applications such as solar powered LED lighting, IoT solar, solar traffic sign, small solar powered system etc.

  • Features:
  • – WSL Solar’s 3V 10W solar panel adopts the latest PERC monocrystalline solar cell,  >21% efficiency.
  • – Dimension 345x190x18mm
  • – Laminated by tempered glass, durable & robust
  • – Ideal for use in solar powered LED lighting, IoT solar,solar traffic sign and small solar powered systems etc.
custom solar panel, 10w solar panel
10W Solar Panel


Item No.WSL-C025
Peak Power (Pmax)10.5W
Voltage at Pmax (Vmp)3.3V
Current at Pmax (Imp)3.182A
Open Circuit Voltage (Voc)3.96V
Short Circuit Current (Isc)3.5A
Cell TypePERC Monocrystalline Solar Cell
Power Tolerance±5%
Encapsulation method3.2mm Tempered glass
Back sheetTPT
Product Warranty5 Years
Lead time25 Days
Storage temperature-20°C ~ 65°C
Working temperature-40°C ~ 85°C
Standard Test Conditions (STC)1000W/m2, 1.5AM, 25°C Cell temperature

Click here to watch the video of this type of custom solar panels. 

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WSL Solar has been a quality and professional manufacturer of custom solar panels and solar solution provider in China since 2006. 

How to Inquire a Custom Solar Panel?

There are different types of custom solar panels: tempered glass solar panel or PET solar panel; mono solar panel or poly solar panel; black solar panel or white solar panel; with frame or not; with junction box or with ribbon only; need wire and terminal or not etc. Do you know how to inquire a custom solar panel? Hope this video could be helpful for you.

How to Inquire a Custom Solar Panel?

What is IBC Solar Panel ?

IBC solar panels are built with the super high efficiency IBC solar cells (“Interdigitated back contact” solar cells). They are laminated by ETFE or PET film, which is light weight and thin. Thess customized solar panels are ideal for use in off grid applications such as IoT devices, smart phones, radio, Bluetooth, wireless sensors, RF Radio Sensitivity or solar gifts etc.

– IBC solar cell with efficiencies of up to 23% guarantee high power output
– Matte finish and no busbar on panel surface
– ETFE or PET laminated, light weight and thin
– Waterproof, scratch resistant & UV resistant
– Excellent performance under low light environments
– Custom manufacturing in various size & shapes available upon request

Lists of existing IBC solar panels from WSL Solar.

ItemSpecificationSizeSolar Cell TypeLamination
WSL-S0016V 1.2W Custom Solar Panel85x85x1.8mmIBC Solar CellPET Film
WSL-S0025V 0.2W Round Solar PanelD=43mmx1.8mmIBC Solar CellPET Film
WSL-S0032V 80mA Small Solar Panel40x30x1.8mmIBC Solar CellPET Film
WSL-S0045V 0.75W mini Solar Panel70x60x2mmIBC Solar CellETFE Film
WSL-S0055V 1W IoT Solar Panel95x69x2mmIBC Solar CellETFE Film
WSL-S0064V 150mA Custom Solar Panel93x40x2mmIBC Solar CellPET Film
WSL-S0075.5V 1W Small Solar Panel80x80x2mmIBC Solar CellETFE Film
WSL-S0086V 120mA Circular Solar PanelD=89mmx2mmIBC Solar CellETFE Film
WSL-S0095V 0.6W ETFE Solar Panel65x65x2mmIBC Solar CellETFE Film
WSL-S0105.5V 1.6W ETFE Solar Panel120x70x2mmIBC Solar CellETFE Film
WSL-S0113V 0.4W PET Solar Panel57x50x2mmIBC Solar CellPET Film
WSL-S0125.5V 0.2W Mini Solar Panel30x50x2mmIBC Solar CellPET Film
IBC Solar Panels

WSL Solar has been a quality and professional manufacturer of customized solar panels and solar solution provider in China since 2006. 


Ensuring Power Supply and Promoting the Construction of Large-scale Photovoltaic Bases

In the past two weeks (09.27-10.10), in response to power supply issues, the State Council of China convened an executive meeting to speed up the construction of large-scale photovoltaic bases and promote the implementation of energy-saving and carbon-reducing transformations in key areas. The arrangements made by the State Council will solve the problem of power cuts that have recently appeared, and ensure the basic lives of the people and the smooth operation of the economy. In these deployments, photovoltaics will play an important role. The following is the domestic and international photovoltaic industry information in the past two weeks.

WSL Solar – Manufacturer of Quality Custom Solar Panel 

China Photovoltaic Industry Information

State Council: Ensuring power supply and promoting the construction of large-scale photovoltaic bases

On October 8, the State Council of China held an executive meeting to further make arrangements for the supply of electricity and coal this winter and next spring to ensure the basic lives of the people and the smooth operation of the economy. The meeting pointed out that reforming and improving the market-oriented formation mechanism of coal and electricity prices, adjusting the fluctuation range of market transaction electricity prices from no more than 10% and 15%, respectively, to no more than 20% in principle. The industry can form prices through market transactions and is not subject to a 20% rise. Accelerate the construction of large-scale wind power and photovoltaic bases in the Gobi desert area, and accelerate the construction of emergency standby and peak shaving power sources. Resolutely curb the blind development of the “two highs” project. Improve the local energy consumption dual control mechanism, and promote that new renewable energy consumption will not be included in the total energy consumption within a certain period of time. Promote the implementation of energy-saving and carbon-reduction transformations in key areas.

Encourage rooftop distributed photovoltaic development

On September 30, ten ministries and commissions including the National Development and Reform Commission and the Ministry of Natural Resources issued the “Notice on Printing and Distributing Guidelines for the Standardized and Healthy Development of National Characteristic Towns.” The “Guidelines” pointed out that characteristic towns should, in accordance with the carbon peak and carbon neutral requirements, coordinate to promote high-quality economic development and high-level protection of the ecological environment. Promote clean, low-carbon, safe and efficient use of energy, guide non-fossil energy consumption and the development of distributed energy, develop rooftop distributed photovoltaics where conditions permit, promote clean heating and contract energy management. Promote low-carbon transformation in industry, construction, transportation and other fields, resolutely curb the blind development of “two highs” projects, vigorously develop green buildings, promote prefabricated buildings, energy-saving doors and windows, and green building materials, and promote green construction.

Tianjin promulgated regulations on promoting carbon peak and carbon neutrality to support the development of non-fossil energy such as solar energy

On September 27, the 29th meeting of the Standing Committee of the 17th Tianjin Municipal People’s Congress reviewed and approved the “Regulations on the Promotion of Carbon Peak Carbon Neutrality in Tianjin”, which will come into force on November 1, 2021. The “Regulations” put forward in the “Green Transition” section to support the development of non-fossil energy such as wind energy, solar energy, geothermal energy, and biomass energy, gradually expand non-fossil energy consumption, coordinate the promotion of hydrogen energy utilization, and promote low-carbon energy to replace high-carbon energy.

Lishui, Zhejiang: Accelerate the promotion of distributed photovoltaics and implement the “Photovoltaic +” project

On October 9, the Development and Reform Commission of Lishui City, Zhejiang Province issued a notice on publicly soliciting opinions on the “Implementation Opinions of the People’s Government of Lishui City on Accelerating the Development of Distributed Photovoltaics (Draft for Solicitation of Comments)”. The “Draft for Comments” requires that the large-scale development of distributed photovoltaic counties (cities, districts) is the starting point, and the “photovoltaic +” project will be fully implemented to promote the high-quality development of the green and low-carbon energy industry, and strive to build a green energy base in East China. Strive to add 1.5 million kilowatts of photovoltaic power to the city during the “14th Five-Year Plan” period, and implement policy support for financial rewards and subsidies.

International Photovoltaic Industry Information

Germany’s third-largest state requires solar energy to be installed on the roofs of all new houses

On October 6, the State Assembly of Baden-Württemberg in Germany passed a legal amendment requiring that from May 1 next year, all newly built houses in the state be installed with solar installations on the roof. From January 1, 2023, all existing buildings in the state will also be retrofitted with solar installations on the roof. This move aims to enable the state to achieve its goal of carbon neutrality by 2030. Baden-Württemberg is the third largest state in area and population in Germany, and the state capital Stuttgart is the headquarters of many well-known companies such as Daimler. 

Kazakhstan: Double the share of renewable energy power generation by 2023

According to the official website of the Prime Minister of Kazakhstan, Ma Ming, the Prime Minister of Kazakhstan, hosted a video conference of the Council for the Improvement of the Investment Environment on October 9 to study the development of renewable energy and the transition to a “low-carbon economy”. In order to achieve the goal of achieving “carbon neutrality” by 2060 proposed by President Tokayev at the United Nations Climate Ambition Summit, the Kazakh government plans to double the share of renewable energy power generation by 2023 to 6%, compared with the previous one. The planned realization of this goal in 2025 is greatly advanced. In the next four years, the Kazakh government also plans to put into operation more than 60 new renewable energy projects, with a total installed capacity of 2,400 MW and a total investment of more than 2.5 billion US dollars.

Posted by Carrie Wong | WSL Solar

WSL Solar has been a quality and professional manufacturer of custom solar panel and solar solution provider in China since 2006.


The National Green Power Trading Pilot in China

The first day of the national green power trading pilot: the average price increased by 2.7 cents/kWh, wind power and photovoltaics welcome major benefits!

China Power Grid learned that on September 7, under the guidance of the National Development and Reform Commission and the National Energy Administration, the State Grid Corporation of China and China Southern Power Grid jointly organized a green power trading pilot kick-off meeting, which opened up a new model of green power consumption in China. It is an important measure to implement “carbon peak and carbon neutrality” based on market mechanism innovation.

A number of industry-leading companies from Shanghai, such as BASF, Covestro, Schneider, and Guoji Electronics, took the lead and signed a blockbuster order to purchase Ningxia 2022-2026 for five consecutive years, totaling 1.53 billion kilowatt-hours of photovoltaic power, and completed The first batch of cross-provincial and cross-regional transactions after the opening of the national green power transaction.

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It is understood that green electricity is mainly electricity converted from renewable energy sources such as wind energy and solar energy. The carbon emissions of these electricity are zero or nearly zero. Green power transactions are mid- to long-term transactions that target green power products such as wind power and photovoltaics.

In today’s “dual carbon” context, the demand for green energy consumption by enterprises is increasing, and the State Grid and China Southern Power Grid have therefore introduced green power trading policies. Different from the general electricity transaction, the environmental value of the electricity after the green electricity transaction is delivered simultaneously, and the traceable green electricity consumption certification is provided.

Insiders pointed out that this green power transaction is to set up a new type of transaction in the power transaction, breaking the homogenization of electricity, creating a single trading market for green power, and setting a separate price for the environmental attributes of green power.

China Power Network checked public information and found that in the first green power transaction launched on September 7th, a total of 259 market entities from 17 provinces participated in the transaction, which reached 7.935 billion kilowatt-hours of electricity. Among them, the electricity traded in the operating area of the State Grid Corporation of China was 6.898 billion kwh, and the electricity traded in the operating area of the China Southern Power Grid was 1.037 billion kwh. This green power transaction is expected to reduce the burning of standard coal by 2.436 million tons and the emission of carbon dioxide by 6.0718 million tons.

Previously, the National Development and Reform Commission has stated that the market entities participating in green power transactions have recently focused on wind power and photovoltaic power generation, and have gradually expanded to other renewable energy sources such as hydropower. Green power transactions will give priority to fully market-oriented green power on the Internet. At the initial stage of the pilot, it is planned to select regions with strong green power consumption willingness. After the pilot work starts, other willing regions will also provide active support in the future. If some provinces have a limited scale of fully market-oriented green electricity in the early stage of the market, they can consider purchasing government subsidies and guaranteed purchase of green electricity from power grid companies.

How do companies join the green power transaction? China Southern Power Grid stated: “As long as the company meets the power market access requirements of the province and region where it is located, after completing the registration at the local power trading center, power users and power sales companies can purchase monthly or more monthly power from wind power and photovoltaic companies, or sign contracts for multiple years. The transaction contract will lock the ownership of green power in advance, and obtain a nationally certified green power consumption certificate.”

China Power Grid noted that, according to China Southern Power Grid, in the southern region’s green power transaction, wind power and photovoltaic power were 300 million kWh and 610 million kWh respectively. The transaction price that reflects the environmental value is at the current price of wind power and photovoltaic power. Based on the average increase of 2.7 cents/kWh. In the next ten years, wind power and photovoltaic power in the southern region will usher in explosive growth. It is estimated that 100 million kilowatts of new installed capacity will be added every five years. By 2030, the installed capacity of new energy will reach 250 million kilowatts, which will become the dominant power source in the southern region.

Industry insiders believe that with the normalization of green power market transactions and the gradual establishment of related mechanisms, more and more new energy will be traded in the green power market, which will surely further increase the level of new energy consumption and promote development, which effectively promotes the construction of a new power market system with new energy as the mainstay, which is even more beneficial to new energy companies.

Posted by Carrie Wong | WSL Solar

WSL Solar has been a quality and professional manufacturer of custom solar panel and solar solution provider in China since 2006.


Original source from https://www.wsl-solar.com/Industry_News/2021/0910/the-national-green-power-trading-pilot.html

The price of silicon material has exceeded 200RMB/kg, cannot stop at all!

According to the latest silicon material transaction price of the Silicon Industry Branch, the domestic silicon material price continues to rise and cannot stop at all!

Among them, the domestic single crystal compound feed price range is 200-205 RMB/kg, and the average transaction price is 202.7 RMB/kg, officially breaking the 200 RMB/kg mark!

Data shows that at the beginning of the year, the average domestic transaction price of single crystal double-investment materials was 87.6 RMB/kg, which is already high compared to 2020. Mainly due to the overhaul and natural disasters suffered by some silicon companies last year, and the production capacity has declined.

However, under the guidance of the large-scale rush for installation at the end of the year and the goal of carbon neutrality, downstream companies have expanded their production capacity to meet market demand, but have neglected the silicon material production capacity.

Custom Solar Panel from WSL Solar 

On the one hand, the price of silicon material has not been high in the past few years, and the life of the company is also tight. Except for Tongwei, other companies have almost no plans for large-scale expansion; on the other hand, the construction period of silicon material production capacity is longer. Even if it expands production synchronously with downstream companies, the start-up date will lag a lot. Together, it exacerbated the shortage of silicon materials.

On the whole, this year’s silicon material price increase is actually another interpretation of the price increase of photovoltaic glass in 2020. However, compared with photovoltaic glass, the price increase of silicon materials this time is more serious in terms of scope and depth.

At present, TBEA, Dongfang Hope and other companies are actively expanding production. The latter’s expansion project has an annual production capacity of even as high as 250,000 tons. After it is put into production, it will definitely alleviate the predicament of this silicon material price increase. However, as mentioned above, the construction cycle of silicon material production capacity is longer, and if the price of silicon material is to return to the era of double digits per kilogram, I am afraid that it will have to wait until 2022 at the earliest.

Posted by Carrie Wong | WSL Solar

WSL Solar has been a quality and professional manufacturer of custom solar panel and solar solution provider in China since 2006.


Source from https://www.wsl-solar.com/Industry_News/2021/0602/silicon-material-price-continues-to-rise.html

Volkswagen & Didi Enter the Photovoltaic Industry

According to foreign media reports, Volkswagen, one of the world’s largest automobile groups, plans to invest 40 million euros to build solar and wind power plants in Europe by 2025. In this regard, Volkswagen CEO Brandstadt said that this move is mainly to meet the additional demand for renewable energy from electric vehicles.

According to Volkswagen’s previously announced plans, 70 electric vehicles (including Audi, Porsche and other models) will be launched in the next 10 years, which naturally involves the issue of electric vehicles. As one of the world’s largest car companies, Volkswagen has already expanded its layout in the photovoltaic field.

As early as 2017, Asia Clean Energy Capital signed a 4.3MW distributed photovoltaic power generation system service agreement with Volkswagen FAW Engine (Dalian) Co., Ltd. The former will be responsible for the investment, construction and operation and maintenance of photovoltaic power generation projects, while the latter will be purchased at an agreed price in order to achieve better energy conservation and environmental protection.

            Quality Custom Solar Panel Manufacturer – WSL Solar  

In addition, SAIC Volkswagen, another joint venture of Volkswagen in China, has also built a number of distributed photovoltaic power generation. Its luxury brand Audi also proposed a plan to use photovoltaic storage to supplement the energy of electric vehicles.

The establishment of solar and wind power plants in Europe this time is just another deployment of Volkswagen in the field of renewable energy, and it also indicates that traditional car companies are actively moving towards clean energy.

Coincidentally. Recently, news has also revealed that Xiaoju Energy, a subsidiary of Didi, is hiring talents and experts in the fields of photovoltaics and energy storage. Obviously, Didi is also exploring new businesses in the photovoltaic field.

It is reported that Xiaoju Energy is positioned as an energy retail platform, covering multiple energy forms such as refueling, charging, gas refueling, photovoltaics, and energy storage. In the future, it will build a “TOP1 energy platform and an energy company integrating upstream and downstream industrial chains.”

On the one hand, Didi has already used a large number of electric vehicles to replace petrol vehicles in its operations; on the other hand, Didi is also cooperating with car companies, which will produce customized electric models based on Didi’s car needs. After a long period of operation , There will be a large number of power batteries retired, which can be used in the field of energy storage.

It can be seen that Xiaoju Energy will build a closed loop of photovoltaic power generation, power batteries for energy storage, and supplementary energy for its operating electric vehicles, thereby transforming to renewable energy, and at the same time creating a more complete travel ecology from the travel end to the upstream. .

After photovoltaics entered the era of parity, not only leading companies have expanded their production, but Didi and Volkswagen, which is famous for its fuel vehicles, have also entered photovoltaics, hoping to reduce carbon emissions and contribute to carbon neutrality. It can be seen that photovoltaic is indeed an important option for renewable energy at the moment, or it will attract more companies to expand in the photovoltaic field.

Posted by Carrie Wong | WSL Solar

WSL Solar has been a quality and professional manufacturer of custom solar panel and solar solution provider in China since 2006.


Original source from https://www.wsl-solar.com/Industry_News/2021/0507/Volkswagen-Didi-enter-photovoltaic-indus.html