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Zinc-based electron transport materials for over 9.6%-efficient S-rich Sb2(S,Se)3 solar cells.
- Source :
- Journal of Materials Chemistry A; 6/7/2021, Vol. 9 Issue 21, p12644-12651, 8p
- Publication Year :
- 2021
-
Abstract
- Despite the toxicity of cadmium, CdS has been used as an electron transport layer (ETL) in highly efficient Sb<subscript>2</subscript>(S,Se)<subscript>3</subscript> solar cells for a long time. In this work, a bilayer structure ETL, denoted as Zn(O,S)/CdS, has been prepared as a substitute for pure CdS in S-rich Sb<subscript>2</subscript>(S,Se)<subscript>3</subscript> solar cells. This achieves two important goals related to the current use of CdS-based Sb<subscript>2</subscript>(S,Se)<subscript>3</subscript> photovoltaics, namely, due to high transmittance and a significant reduction of CdS usage, an increase of the short circuit current density in the short-wavelength range (by about 1.5 mA cm<superscript>−2</superscript>) and a decrease of the usage of CdS (by about 75%). Interestingly, the fabricated FTO/Zn(O,S)/CdS/Sb<subscript>2</subscript>(S,Se)<subscript>3</subscript>/Spiro/Au device achieved an impressive power conversion efficiency of 9.62% and shows high stability without the light-soaking (LS) effect and hysteresis. To date, this conversion efficiency value represents the highest efficiency of all Sb-based solar cells with Cd-free or reduced-Cd ETLs based on either substrate or superstrate device configurations. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 9
- Issue :
- 21
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 150745009
- Full Text :
- https://doi.org/10.1039/d1ta02356j