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Front. Phys. | doi: 10.3389/fphy.2019.00166

Diagnosis of Perovskite solar cells through absolute electroluminescence-efficiency measurements

 Shaoqiang Chen1*, Juanjuan Xue1, Xiaobo Hu1, Yixin Guo1, Guoen Weng1, Jinchun Jiang1, Ziqiang Zhu1, Junhao Chu1 and Hidefumi Akiyama2
  • 1East China Normal University, China
  • 2The University of Tokyo, Japan

Two organic-inorganic halide CH3NH3PbI3 perovskite solar cells prepared in the same experimental batch but having different power conversion efficiencies—18.46% and 17.15%—were investigated based on the absolute electroluminescence (EL) efficiency measurements and traditional I-V measurements. The possible factors that affect the power conversion efficiency were also investigated. Comparing the experimental I-V curves of the two solar cells, it was found that the short-circuit currents (Jsc) were nearly the same; however, the open-circuit voltages (Voc) were markedly different. Moreover, the deduced I-V curves from the absolute EL efficiencies of the two solar cells, which were mainly affected by the material quality, were almost same, proving that the device processing technology has a vital effect on Voc.

Keywords: CH3NH3PbI3, perovskite, thin-film solar cell, Energy losses, , absolute electroluminescence (EL) efficiency measurements

Received: 08 Jul 2019; Accepted: 11 Oct 2019.

Copyright: © 2019 Chen, Xue, Hu, Guo, Weng, Jiang, Zhu, Chu and Akiyama. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Shaoqiang Chen, East China Normal University, Shanghai, China, sqchen@ee.ecnu.edu.cn