Interfacial Layers for Bulk Heterojunction Polymer Photovoltaics
- Interfacial Layers for Bulk Heterojunction Polymer Photovoltaics
- 태양전지; 폴리머 태양전지; 유기태양전지
- Issue Date
- The 3rd International Workshop on Flexible & Printable Electronics
- Polymer solar cells utilize bulk heterojunction (BHJ) type photo-active layer in which the electron donating polymer and electron accepting C60 derivatives are blended. The blended system causes charge recombination at the interface between the BHJ active layer and electrode. To reduce the charge recombination at the interface, it is needed to use an interlayer that can selectively transfer electrons or holes. We have developed solution processable wide band gap inorganic interfacial layers for polymer solar cells. The effect of interlayers on the performance of polymer solar cell was investigated for various types of conjugated polymers. We have found that inorganic interfacial layers enhanced the solar cell efficiency through the reduction of charge recombination at the interface. Furthermore, the stability of the polymer solar cell using the interlayer was significantly improved.
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