Thickness-dependent carriers transport in Sb2Se3 thin film solar cells

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-02-18 DOI:10.1007/s12598-024-03171-0

Zi-Xiu Cao, Chuan-Yu Liu, Jian-Peng Li, Jia-Bin Dong, Shi-Hao Hu, Wei-Huang Wang, Xu Wu, Yi Zhang

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Abstract

The structural design of n-i-p in antimony selenide (Sb₂Se₃) thin film solar cells can effectively improve the low carrier collection efficiency caused by the lower doping concentration of Sb₂Se₃. However, the unideal carrier transport ability of the intrinsic light-absorbing layer remains a major limitation for its power conversion efficiency improvement. Herein, it is discovered that the carrier transport in Sb₂Se₃ thin films strongly depends on the film thickness of the absorber layer in n-i-p structure. By exploring the carrier transport mechanism under different thicknesses of light-absorbing layers, a suitable absorber layer with thickness of 550 nm is demonstrated can effectively separate, transport, and extract photogenerated carriers in Sb₂Se₃ solar cells. Finally, the vapor transport deposition processed Sb₂Se₃ solar cells achieve the highest PCE of 7.62% with a short-circuit current density of 30.71 mA·cm⁻². This finding provides a constructive guidance for the future researches on Sb₂Se₃ thin film solar cells with n-i-p structure.

Graphical abstract

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Sb2Se3薄膜太阳能电池中载流子的厚度依赖性输运

硒化锑（Sb2Se3）薄膜太阳能电池中n-i-p的结构设计可以有效改善由于Sb2Se3掺杂浓度较低而导致的载流子收集效率低的问题。然而，本征光吸收层的载流子输运能力不理想仍然是制约其功率转换效率提高的主要因素。研究发现，在n-i-p结构中，Sb2Se3薄膜中的载流子输运强烈依赖于吸收层的薄膜厚度。通过探索不同光吸收层厚度下载流子的输运机制，证明了550 nm的吸收层可以有效地分离、输运和提取Sb2Se3太阳能电池中的光生载流子。最后，气相输运沉积制备的Sb2Se3太阳能电池的PCE最高，为7.62%，短路电流密度为30.71 mA·cm−2。这一发现为未来研究具有n-i-p结构的Sb2Se3薄膜太阳能电池提供了建设性的指导。图形抽象

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.