Cuprous iodide dose dependent passivation of MAPbI3 perovskite solar cells

Po Ting Wu, Chun Chih Hu, Liang Yu Chen, Pei Ying Lin, Tzung Fang Guo, Yaw Shyan Fu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

MAPbI3 has been considered as a candidate for the active layer of perovskite solar cells in recent years. We proposed a device model to investigate the contribution of cuprous iodide (CuI) to MAPbI3 perovskite thin films to power conversion efficiency (PCE) and demonstrated that the dosage of CuI affects the grain size of thin films and the PCE. Through the results of the SEM analysis, we found that the grain boundaries of MAPbI3 perovskite films decreased with increases in the dosage of CuI and the grain size increased significantly from 164 nm ± 49 nm–299 nm ± 127 nm. In addition, the results of the PL measurement showed that the PL intensity decreased after addition of CuI to the MAPbI3 perovskite thin films, suggesting a reduction in the charge recombination. The XRD patterns indicated that the addition of CuI did not influence the main structure of the MAPbI3 perovskite. Interestingly, CuI plays a key role in the passivation of defects in MAPbI3 perovskite thin films, which can reduce non-radiative recombination and increase the fill factor and open-circuit voltage of the device. In this study, we adjusted the grain size and passivated the MAPbI3 thin film by controlling the dosage of CuI. We also increased the power conversion efficiency from 10% to 13%. This type of perovskite solar cell provided a simple, low cost preparation process for practical applications.

Original languageEnglish
Article number106080
JournalOrganic Electronics
Volume91
DOIs
Publication statusPublished - 2021 Apr

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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