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EARTH-ABUNDANT METAL CHALCOGENIDES: SYNTHESIS, INTERFACE MODIFICATION, AND APPLICATIONS IN ENERGY CONVERSION DEVICES

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abstract
Metal chalcogenides (MCs) have attracted significant attention in a variety of energy devices for the wide range of properties that MCs can offer by combining different metal cations and chalcogen anions. However, the most common MCs used for photovoltaic and thermoelectric devices all consist rare or toxic elements which rises criticism on their candidacy as a solution for future sustainable energy. The focus of this work is to develop low-cost solution methods to synthesize non-toxic earth-abundant MC materials Cu2ZnSnS¬4 (CZTS) and Sb2S3 for thin-film solar cells and thermoelectric generator. By tweaking the surface chemistry of CZTS nanocrystals, we fabricated CZTS thin-films with high carrier mobility and large grain size without involving hazardous procedure. We also derived ligand-free nanostructured CZTS from aerogel for the first time, and explored its potential application for thermoelectric generator. At last, we’ll show you a planar heterojunction Sb2S3 solar cell with an efficiency of 4.2% fabricated via a simple sol-gel method. Combined with interface modification, we achieved a record-breaking power conversion efficiency 5.3%.
subject
interface modification
metal chalcogenide
nanoparticle
photovoltaic
solar cell
thermoelectric
contributor
Huang, Wenxiao (author)
Carroll, David L (committee chair)
Geyer, Scott (committee member)
Kim-Shapiro, Daniel B (committee member)
Ucer, Kamil Burak (committee member)
Williams, Richard T (committee member)
date
2017-06-15T08:36:25Z (accessioned)
2018-06-14T08:30:10Z (available)
2017 (issued)
degree
Physics (discipline)
embargo
2018-06-14 (terms)
identifier
http://hdl.handle.net/10339/82261 (uri)
language
en (iso)
publisher
Wake Forest University
title
EARTH-ABUNDANT METAL CHALCOGENIDES: SYNTHESIS, INTERFACE MODIFICATION, AND APPLICATIONS IN ENERGY CONVERSION DEVICES
type
Dissertation

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