Chinese Academy of Sciences has made breakthroughs in research on organic solar cell materials

The new high-efficiency organic solar cell research project undertaken by the Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences has recently passed the acceptance of experts organized by the Frontier Science and Education Bureau of the Chinese Academy of Sciences. The expert group believes that the project has made important progress in the design and synthesis of high-performance photovoltaic polymers, the synthesis of new receptors and interface materials, and the production of high-efficiency photosensitive films and large-area devices, laying the foundation for mass production.

Changchun Yinghua Institute and the Institute of Chemistry of the Chinese Academy of Sciences and the Qingdao Institute of Bioenergy and Process of the Chinese Academy of Sciences have jointly launched a new high-efficiency organic solar cell project in May 2010 under the support of the important direction of the Chinese Academy of Sciences' knowledge innovation project. Research. After nearly 4 years of unremitting efforts, they have synthesized a variety of new polymer donor photovoltaic materials with strong and broad absorption and high hole mobility (up to 1.1×10-2 cm2/V/s). The energy conversion efficiency of small-area (0.04~0.1cm2) photovoltaic devices in simulated sunlight is up to 8.79%; a variety of fullerene derivatives with different functional groups and addition sites are designed and synthesized, and several kinds Polymer type, small molecular type and metal oxide type interface materials, and are used in devices; the problem of lowering the efficiency when the battery size is amplified is too fast, and the control of the battery size and the aspect ratio is realized by the electronic ink and Further optimization of the post-processing process of the photo-sensitive layer of the device obtained a single-cell battery with a single-area area of ​​10.2 cm2 and a conversion efficiency of 4.14%. The conversion efficiency of the prepared battery module with an area of ​​46.9 cm2 was 3.12%, which was a larger area. The module preparation paved the way.

The project applied for 16 invention patents in China, authorized 8 projects, published 106 SCI income papers, and cultivated and established an excellent team with core competitiveness in this field.

It is understood that the new high-performance organic solar cells have attracted much attention due to their light weight, good flexibility, wet processing, and large area. Among them, designing and synthesizing novel conjugated polymer materials and optimizing the morphology of the photosensitive layer are important ways to improve the performance of the device. Small-area battery devices are usually prepared by spin coating process. However, this process cannot prepare large-area battery modules and modules, and it is necessary to develop a solution preparation process suitable for large-area production.

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