Anti-solvent mixture-mediated reduction of photocurrent hysteresis in high-impurity perovskite precursor based MAPbI3 solar cells

Chung Yu Li, Yin Song Liao, Diksha Thakur, Anjali Chandel, Shou En Chiang, Jia Ren Wu, Po Han Lee, Chia Lung Tsai, Chun Chuen Yang, Yuan Liang Zhong, Ji Lin Shen, Sheng Hsiung Chang

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

High-impurity precursor based CH3NH3PbI3 (MAPbI3) perovskite thin films are fabricated by using the one-step spin-coating method with an anti-solvent mixture-mediated nucleation (ASMEN) process under various dropping times. The structural, optical and excitonic properties of the resultant perovskite thin films are characterized through the X-ray diffractometer, absorbance spectrometer, photoluminescence spectrometer and Raman scattering spectrometer. The experimental results show that the dropping time and the use of 10% dicloromethane (DCM) in the ASMEN process strongly influences the formation of point defects in the resultant MAPbI3 thin film, which dominates the current-hysteresis behavior in the current density-voltage curves of solar cells. In addition, this investigation helps further understand the effects of toluene/DCM anti-solvent mixture on the formation of point defect-free MAPbI3 thin films.

Original languageEnglish
Pages (from-to)86-92
Number of pages7
JournalSolar Energy
Volume214
DOIs
StatePublished - 15 Jan 2021

Keywords

  • Anti-solvent mixture-mediated nucleation
  • Current hysteresis
  • High-impurity perovskite precursor
  • Point defects

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