Enhanced Performance of Perovskite Solar Cells via Reactive Post-treatment Process Utilizing Guanidine Acetate as Interface Modifier

Organic–inorganic lead halide perovskites (OIHPs) have emerged as promising materials for next-generation photovoltaics. However, performance improvements in the perovskite-based device are still limited due to defects that exist more intensively on the surface as well as grain boundaries (GBs) and mismatching energy levels at the interface. Herein, a reactive post-treatment process (RPP) using guanidine acetate (GA) is adopted to address defects and interfacial energy level matching at the perovskite surface. The RPP with GA (GA-RPP) results in the formation of an improved perovskite layer with large grain size and low GB density, leading to the formation of secondary phases on the perovskite surface with appropriate energy levels, resulting in reduced defect density and charge recombination. Furthermore, density functional theory analysis reveals that the Pb-rich secondary phase could improve the conduction of electrons at the perovskite interface. Therefore, the GA-RPP-based perovskite-based solar cell (PSC) shows enhanced performance with 20.4% efficiency and long-term stability.

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Work Title Enhanced Performance of Perovskite Solar Cells via Reactive Post-treatment Process Utilizing Guanidine Acetate as Interface Modifier
Access
Open Access
Creators
  1. Pramila Patil
  2. Dilpreet Singh Mann
  3. Sachin R. Rondiya
  4. Nelson Y. Dzade
  5. Sung Nam Kwon
  6. Seok In Na
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Solar RRL
Publication Date November 1, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1002/solr.202100547
Deposited January 13, 2022

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Version 1
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  • Created
  • Added Solar_RRL_Final.docx
  • Added Creator Pramila Patil
  • Added Creator Dilpreet Singh Mann
  • Added Creator Sachin R. Rondiya
  • Added Creator Nelson Y. Dzade
  • Added Creator Sung Nam Kwon
  • Added Creator Seok In Na
  • Published
  • Updated
  • Updated