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Efficient TiO2 Surface Treatment Using Cs2CO3 for Solution-Processed Planar-Type Sb2S3 Solar Cells

Title
Efficient TiO2 Surface Treatment Using Cs2CO3 for Solution-Processed Planar-Type Sb2S3 Solar Cells
Authors
Kim, Wook HyunWoo, SunghoKim, Kang-PilKwon, Soo MinKim, Dae-Hwan
DGIST Authors
Kim, Wook Hyun; Woo, SunghoKim, Kang-Pil; Kwon, Soo Min; Kim, Dae-Hwan
Issue Date
2019-01
Citation
Nanoscale Research Letters, 14, 25-1-25-9
Type
Article
Article Type
Article
Author Keywords
Planar-type Sb2S3 solar cellElectron transport layerSurface treatmentSolution processCs2CO3
Keywords
CESIUM CARBONATELOW-COSTELECTRONPRECURSORFILM
ISSN
1556-276X
Abstract
We report a highly effective surface treatment method for planar-type Sb2S3 solar cells by employing a Cs2CO3-modified compact TiO2 (c-TiO2) electron transport layer. It is found that surface treatment using a Cs2CO3 solution can shift the work function of c-TiO2 upward and reduce its surface roughness. As a result, compared with the power conversion efficiency of untreated solar cells, that of the treated solar cells with a glass/FTO/c-TiO2(/Cs2CO3)/Sb2S3/P3HT/Au structure significantly improved from 2.83 to 3.97%. This study demonstrates that the introduction of Cs2CO3 on a c-TiO2 layer is a simple and efficient way to adjust the work function of the electron transport layer and fabricate high-performance planar-type Sb2S3 solar cells. © 2019, The Author(s).
URI
http://hdl.handle.net/20.500.11750/9568
DOI
10.1186/s11671-019-2858-5
Publisher
Springer Verlag
Related Researcher
Files:
Collection:
Division of Energy Technology1. Journal Articles


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