Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 13: Poster Session I
HL 13.30: Poster
Monday, March 12, 2018, 17:30–19:30, Poster B
polymer solar cells using an AgAl alloy anode — Xiangkun Jia1,2 and •Xiaohong Chen1 — 1Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, and Department of Physics, East China Normal University, Shanghai 200062, China. — 2Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Str. 61, 01187 Dresden, Germany.
In this work, we improve the performance and air stability of inverted polymer solar cells (PSCs) using a combination of a LiF-modified ITO cathode and a MoO3/AgAl alloy anode. The power conversion efficiency (PCE) of PSCs with the AgAl contact reaches 9.4%, which is higher than that of the cells with a Ag (8.8%) or Al electrode (7.6%). This improvement is primarily attributed to the formation of thin AlOx at MoO3/AgAl interface, preventing the Ag diffusion and improving the hole tunneling probability and built-in potential across the active layer in the cells. The PCE of AgAl-based PSCs is further increased to up to 10.3% through the incorporation of an ultrathin LiF-modified ITO, due to an improvement in electron collection. These devices exhibit a superior stability as compared to the cells with Ag and Al contacts. The PCE of the AgAl-based cells without encapsulation remains 78% of its original value after the cells were aged for 380 days in air.