Frontiers in Physics (Oct 2019)

Diagnosis of Perovskite Solar Cells Through Absolute Electroluminescence-Efficiency Measurements

  • Juanjuan Xue,
  • Xiaobo Hu,
  • Yixin Guo,
  • Guoen Weng,
  • Jinchun Jiang,
  • Shaoqiang Chen,
  • Ziqiang Zhu,
  • Junhao Chu,
  • Hidefumi Akiyama

DOI
https://doi.org/10.3389/fphy.2019.00166
Journal volume & issue
Vol. 7

Abstract

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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 the same, proving that the device processing technology has a vital effect on Voc.

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