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Title: Controllable solution-phase epitaxial growth of Q1D Sb₂(S,Se)₃/CdS heterojunction solar cell with 9.2% efficiency
Authors: Jin, Xin
Fang, Yanan
Salim, Teddy
Feng, Minjun
Yuan, Zhengtian
Hadke, Shreyash
Sum, Tze Chien
Wong, Lydia Helena
Keywords: Engineering::Materials
Issue Date: 2021
Source: Jin, X., Fang, Y., Salim, T., Feng, M., Yuan, Z., Hadke, S., Sum, T. C. & Wong, L. H. (2021). Controllable solution-phase epitaxial growth of Q1D Sb₂(S,Se)₃/CdS heterojunction solar cell with 9.2% efficiency. Advanced Materials, 33(44), 2104346-.
Project: MOE2016-T2-1-030
Journal: Advanced Materials 
Abstract: Antimony sulfoselenide (Sb2 (S,Se)3 ) is a promising photoabsorber for stable and high efficiency thin film photovoltaics (PV). The unique quasi-1D (Q1D) crystal structure gives Sb2 (S,Se)3 intriguing anisotropic optoelectronic properties, which intrinsically require the optimization of crystal growth orientation, especially for electronic devices with vertical charge transport such as solar cells. Although the efficiency of Sb2 (S,Se)3 solar cells has been improved greatly through optimizing the material quality, the fundamental issue of crystal orientation control in polycrystalline films remains unsolved, resulting in charge carrier recombination losses in the device. Herein, the epitaxial growth of vertically-oriented Sb2 (S,Se)3 film on hexagonal CdS is successfully realized via a solution-based synergistic crystal growth process. The crystallographic orientation relationship between Sb2 (S,Se)3 light absorber and the CdS substrate has been rigorously investigated. The best performing Sb2 (S,Se)3 solar cell shows a high power conversion efficiency of 9.2% owing to the faster charge transport in the bulk and the efficient charge extraction across the heterojunction. This study points to a new direction to control the crystal growth of mixed-anion Sb2 (S,Se)3 , which is crucial to achieve high efficiency solar cells based on antimony chalcogenides with low dimensionality.
ISSN: 0935-9648
DOI: 10.1002/adma.202104346
Schools: School of Materials Science and Engineering 
School of Physical and Mathematical Sciences 
Organisations: Singapore-HUJ Alliance for Research and Enterprise
Nanomaterials for Energy and Energy-Water Nexus
Campus for Research Excellence and Technological Enterprise
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © 2021 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ERI@N Journal Articles
MSE Journal Articles
SPMS Journal Articles

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