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Seok, Sang Il
Laboratory for Energy Harvesting Materials and Systems (LEHMS)
Research Interests
  • Solar energy conversion, perovskite solar cells, inorganic-organic hybrid materials and processing, solution chemistry

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Regulating the Surface Passivation and Residual Strain in Pure Tin Perovskite Films

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Title
Regulating the Surface Passivation and Residual Strain in Pure Tin Perovskite Films
Author
Hu, ManmanNie, RimingKim, HyeonwooWu, JianchangChen, ShanshanPark, Byung-wookKim, GwisuKwon, Hyoung-WooSeok, Sang Il
Issue Date
2021-10
Publisher
AMER CHEMICAL SOC
Citation
ACS ENERGY LETTERS, v.6, no.10, pp.3555 - 3562
Abstract
The passivation of electronic defects at the surfaces and grain boundaries of perovskite materials is one of the most important strategies for suppressing charge recombination in perovskite solar cells (PSCs). Although several passivation molecules have been investigated, few studies have focused on their application in regulating both the surface passivation and residual strain of perovskite films. In this study, the residual strain distribution profiles of the Cs(0.1)FA(0.9)SnI(3) perovskite thin films and their effect on the photovoltaic device efficiencies were investigated. We found a gradient distribution of the out-of-plane compressive strain that correlated with the compositional inhomogeneity perpendicular to the substrate surface. By deliberately engineering dual effects of the surface passivation and residual strain, we achieved a record power conversion efficiency of up to 9.06%, the highest ever reported in a typical n-i-p architecture.
URI
https://scholarworks.unist.ac.kr/handle/201301/54879
URL
https://pubs.acs.org/doi/10.1021/acsenergylett.1c01575
DOI
10.1021/acsenergylett.1c01575
ISSN
2380-8195
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