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Title: Divalent Anionic Doping in Perovskite Solar Cells for Enhanced Chemical Stability

The chemical stabilities of hybrid perovskite materials demand further improvement toward long-term and large-scale photovoltaic applications. Herein, the enhanced chemical stability of CH 3NH 3PbI 3 is reported by doping the divalent anion Se 2- in the form of PbSe in precursor solutions to enhance the hydrogen-bonding-like interactions between the organic cations and the inorganic framework. As a result, in 100% humidity at 40 degrees C, the 10% w/w PbSe-doped CH 3NH 3PbI 3 films exhibited >140-fold stability improvement over pristine CH 3NH 3PbI 3 films. As the PbSe-doped CH 3NH 3PbI 3 films maintained the perovskite structure, a top efficiency of 10.4% with 70% retention after 700 h aging in ambient air is achieved with an unencapsulated 10% w/w PbSe:MAPbI 3-based cell. As a bonus, the incorporated Se 2- also effectively suppresses iodine diffusion, leading to enhanced chemical stability of the silver electrodes.
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  1. Northern Illinois Univ., DeKalb, IL (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 0935-9648
Grant/Contract Number:
AC36-08GO28308; AC02-06CH11357
Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 34; Journal ID: ISSN 0935-9648
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
Country of Publication:
United States
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; chemical doping; iodine diffusion; moisture stability; perovskite solar cells
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1459460