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Title: Optical response of mixed methylammonium lead iodide and formamidinium tin iodide perovskite thin films

Here, mixed tin (Sn) and lead (Pb) based perovskite thin films have been prepared by solution processing combining methylammonium lead iodide (MAPbI 3) and formamidinium tin iodide (FASnI 3) precursors. Optical response in the form of complex dielectric function (ε = ε 1 + iε 2) spectra and absorption coefficient (α) spectra of (FASnI 3) 1-x(MAPbI 3) x based perovskite films have been extracted over a spectral range 0.74 to 5.89 eV using spectroscopic ellipsometry. Absorption band edge energy changes as a function of composition for films including FASnI 3, MAPbI 3, and mixed x = 0.20, 0.35, 0.40, and 0.6 (FASnI 3) 1-x(MAPbI 3) x perovskites. (FASnI 3) 0.60(MAPbI 3) 0.4 is found to have the minimum absorption band edge energy near ~1.2 eV.
Authors:
 [1] ;  [1] ; ORCiD logo [1] ;  [1]
  1. Univ. of Toledo, Toledo, OH (United States). Dept. of Physics and Astronomy & Wright Center for Photovoltaics Innovation and Commercialization
Publication Date:
Grant/Contract Number:
TECH-09-025; CHE-1230246 DMR-1534586; FOA-0000990
Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 7; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Toledo, OH (United States). Dept. of Physics and Astronomy & Wright Center for Photovoltaics Innovation and Commercialization
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1393254
Alternate Identifier(s):
OSTI ID: 1369482

Ghimire, Kiran, Zhao, Dewei, Yan, Yanfa, and Podraza, Nikolas J. Optical response of mixed methylammonium lead iodide and formamidinium tin iodide perovskite thin films. United States: N. p., Web. doi:10.1063/1.4994211.
Ghimire, Kiran, Zhao, Dewei, Yan, Yanfa, & Podraza, Nikolas J. Optical response of mixed methylammonium lead iodide and formamidinium tin iodide perovskite thin films. United States. doi:10.1063/1.4994211.
Ghimire, Kiran, Zhao, Dewei, Yan, Yanfa, and Podraza, Nikolas J. 2017. "Optical response of mixed methylammonium lead iodide and formamidinium tin iodide perovskite thin films". United States. doi:10.1063/1.4994211. https://www.osti.gov/servlets/purl/1393254.
@article{osti_1393254,
title = {Optical response of mixed methylammonium lead iodide and formamidinium tin iodide perovskite thin films},
author = {Ghimire, Kiran and Zhao, Dewei and Yan, Yanfa and Podraza, Nikolas J.},
abstractNote = {Here, mixed tin (Sn) and lead (Pb) based perovskite thin films have been prepared by solution processing combining methylammonium lead iodide (MAPbI3) and formamidinium tin iodide (FASnI3) precursors. Optical response in the form of complex dielectric function (ε = ε1 + iε2) spectra and absorption coefficient (α) spectra of (FASnI3)1-x(MAPbI3)x based perovskite films have been extracted over a spectral range 0.74 to 5.89 eV using spectroscopic ellipsometry. Absorption band edge energy changes as a function of composition for films including FASnI3, MAPbI3, and mixed x = 0.20, 0.35, 0.40, and 0.6 (FASnI3)1-x(MAPbI3)x perovskites. (FASnI3)0.60(MAPbI3)0.4 is found to have the minimum absorption band edge energy near ~1.2 eV.},
doi = {10.1063/1.4994211},
journal = {AIP Advances},
number = 7,
volume = 7,
place = {United States},
year = {2017},
month = {7}
}