| Summary: | 碩士 === 國立清華大學 === 光電工程研究所 === 97 === Although the power conversion efficiency (PCE) of single layer inorganic solar cells have achieved 24%, the supply of silicon ingredient and the machines of complicated fabrication process are expensive, it might take too much cost while commercializing this method. In contrast, polymer solar cells have attracted great attention because of their unique properties such as simple and cost-effective fabrication process, light weight, and flexibility. Photonic devices on flexible substrates will develop toward large area and tandem construction by using the blade coating which combine with roll-to-roll process.
In our work, we blend conjugated polymer P3HT and PCBM as the active layer absorption material. The bulk hetero junction of P3HT and PCBM blending in DCB blade-coated on patterned IZO PC flexible substrates makes the process of exciton diffusion to the charge separation donor-acceptor interface be efficient.
Researches demonstrate that PCE of blade-coating applying in flexible organic solar cell with normal and inverted structure has the same or even better result compare with PCE of spin-coating. The highest PCE of normal cell fabricated by blade coating and spin coating are 2.24%.and 2.29% respectively. For inverted structure we have 3.37% for blade-coating and 3.25% for spin-coating. Additionally, it is an advantage that blade-coating can apply to roll to roll continuously fabrication and large area application. According to these reasons, we can expect that blade-coating can replace spin-coating on flexible substrate in the near future.
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