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Controlled Growth of BiSI Nanorod-Based Films Through a Two-Step Solution Process for Solar Cell Applications

Title
Controlled Growth of BiSI Nanorod-Based Films Through a Two-Step Solution Process for Solar Cell Applications
Authors
Choi, Yong ChanHwang, Eunjeong
DGIST Authors
Choi, Yong Chan; Hwang, Eunjeong
Issue Date
2019-12
Citation
Nanomaterials, 9(12), 1650
Type
Article
Article Type
Article
Author Keywords
bismuth chalcohalidesBiSIBi2S3solution processthiol-aminesolar cells
Keywords
EFFICIENT
ISSN
2079-4991
Abstract
Pb-based hybrid perovskite solar cells, despite their advantages, face challenges in commercialization. In recent years, Bi-based chalcohalides are being considered as potential alternative candidates, however, their current device efficiency remains unsatisfactory. Herein, a two-step solution method is developed and applied to the fabrication of BiSI films. The method consists of the formation of Bi2S3 (step I) and its conversion to BiSI (step II). The Bi2S3 was fabricated by a thiol-amine solution process and the BiSI conversion was achieved by chemical reaction between the as-formed Bi2S3 and BiI3. It was found that the formation of BiSI was highly dependent on the Bi:S molar ratio of the Bi2O3-thiourea solution and the number of times of step I. The as-fabricated BiSI film had an optical band gap of 1.61 eV and exhibited nanorod morphology. In addition, the electronic structure is explored and discussed for solar cells applications. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
URI
http://hdl.handle.net/20.500.11750/11027
DOI
10.3390/nano9121650
Publisher
MDPI AG
Related Researcher
  • Author Choi, Yong Chan  
  • Research Interests Solar Cells; Chalcohalides; chalcohalides; sulfides; selenides
Files:
Collection:
Division of Energy Technology1. Journal Articles


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