Investigating the effects of active layer on the shunt resistance and indoor efficiency of organic solar cells

作者：Mengyu Qiu, Yuyan Li, Shibo Wang, Yajing Zhang, Guilong Cai, Dashan Qin · 发表于：Physica Scripta · 年份：2025 · DOI：10.1088/1402-4896/aded48 · 被引用次数：6 · 研究领域：Organic Electronics and Photovoltaics、Conducting polymers and applications、Silicon and Solar Cell Technologies

Abstract The effects of active layer on the shunt resistance and indoor efficiency of organic solar cells have been investigated experimentally and theoretically under various-intensity light. The active layers with larger-size donor/acceptor domains show larger energetic disorders; they enable larger shunt resistance and lower carrier photogeneration under indoor light while smaller shunt resistance and higher carrier photogeneration under 1 sun AM 1.5G illumination. Increasing the ratio of polymeric donor to small-molecular acceptor decreases the energetic disorder, shunt resistance and carrier photogeneration. The variation of shunt resistance with active layer is well understood based on the free volume of active layer. The shunt resistance, energetic disorder and carrier photogeneration are all found vital to the efficiency of indoor organic photovoltaics. The contradiction between the small energetic disorder and large shunt resistance under indoor light is the key issue to limit the indoor efficiency of organic solar cells.