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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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Efficient Nanostructured TiO2/SnS Heterojunction Solar Cells

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Title
Efficient Nanostructured TiO2/SnS Heterojunction Solar Cells
Author
Yun, Hyun‐SungPark, Byung‐wookChoi, Yong ChanIm, JinoShin, Tae JooSeok, Sang Il
Issue Date
2019-08
Publisher
Wiley-VCH Verlag
Citation
ADVANCED ENERGY MATERIALS, pp.1901343
Abstract
Tin sulfide (SnS) is one of the most promising solar cell materials, as it is abundant, environment friendly, available at low cost, and offers long-term stability. However, the highest efficiency of the SnS solar cell reported so far remains at 4.36% even using the expensive atomic layer deposition process. This study reports on the fabrication of SnS solar cells by a solution process that employs rapid thermal treatment for few seconds under Ar gas flow after spin-coating a precursor solution of SnCl2 and thiourea dissolved in dimethylformamide onto a nanostructured thin TiO2 electrode. The best-performing cell exhibits power conversion efficiency (PCE) of 3.8% under 1 sun radiation conditions (AM1.5G). Moreover, secondary treatment using SnCl2 results in a significant improvement of 4.8% in PCE, which is one of the highest efficiencies among SnS-based solar cells, especially with TiO2 electrodes. The thin film properties of SnS after SnCl2 secondary treatment are analyzed using grazing-incidence wide-angle X-ray scattering, and high-resolution transmittance electron microscopy.
URI
https://scholarworks.unist.ac.kr/handle/201301/27384
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/aenm.201901343
DOI
10.1002/aenm.201901343
ISSN
1614-6832
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