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🌱 100% Organic Solar Cells Set World Record for Efficiency

Kanazawa University
 April 2025

🌍 Cleaner, More Sustainable Solar Energy

In a major breakthrough for sustainable renewable energy, researchers from Kanazawa University, in collaboration with REIKO Co., Ltd. and Queen’s University in Canada, have developed fully organic solar cells that double the efficiency of previous versions, reaching a power conversion efficiency (PCE) of 8.7%.

Unlike conventional silicon or perovskite-based solar cells, which contain hazardous materials such as lead and metal oxides, these new cells are composed entirely of organic carbon-based materials. This allows for safer disposal and significantly reduces environmental impact and end-of-life processing costs.


⚙️ Key Technological Innovations

1. PEDOT:PSS Transparent Electrode

The research team developed a transparent electrode using the conductive polymer PEDOT:PSS, which can be fabricated at lower temperatures (80 °C) without the need for strong acids or bases. This electrode achieves a sheet resistance of less than 70 Ξ©/sq, making it suitable for film-type solar cells.

2. Carbon Nanotube Electrode Lamination Method

To prevent damage to the lower organic layers during electrode fabrication, a lamination method was implemented. This technique forms carbon nanotube electrodes separately on barrier films, which are then attached to the device. This prevents solvent-related damage to the organic layers below.



πŸ“ˆ Results and Future Applications

Combining these innovations, the fully organic solar cells achieved a record-breaking power conversion efficiency of 8.7%—more than double the previous 4.0% benchmark.

These lightweight and flexible solar cells are ideal for use in environmentally sensitive areas such as farmland and wearable technology. Their adaptability also allows for installation in locations where traditional rigid panels are not feasible.

πŸ–Ό️ Suggested Images for the Blog

  1. Structure of Organic Solar Cells
    An illustration showing the layered architecture of the newly developed organic solar cells by Kanazawa University.

  2. Efficiency Comparison Chart
    A visual comparing the energy conversion efficiencies of organic, silicon, and perovskite solar cells.

  3. Real-World Applications
    Photos of the organic solar cells in use on portable devices or agricultural settings.

Note: To access these images, it is recommended to visit the official Kanazawa University website or contact their press office for authorized media materials.


Open Your Mind!!!

Source: Kanazawa University

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