PO43− Tetrahedron Assisted Chelate Engineering for 10.67%-Efficient Antimony Selenosulfide Solar Cells

IF 27.4 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Donglou Ren, Boyang Fu, Jun Xiong, Yi Wang, Bin Zhu, Shuo Chen, Zhiqiang Li, Hongli Ma, Xianghua Zhang, Daocheng Pan, Bingsuo Zou, Guangxing Liang
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Abstract

Anisotropic carrier transport and deep-level defect of antimony selenosulfide (Sb2(S,Se)3) absorber are two vital auses restraining the photovoltaic performance of this emerging thin-film solar cell. Herein, chelate engineering is proposed to prepare high-quality Sb2(S,Se)3 film based on hydrothermal deposition approach, which realizes desirable carrier transport and passivated defects by using tetrahedral PO43− ion in dibasic sodium phosphate (Na2HPO4, DSP). The PO43− Lewis structure, on one hand in the form of [(SbO)3(PO4)] chelate, can adsorb on the polar planes of cadmium sulfide (CdS) layer, promoting the heterogeneous nucleation, and on the other hand, the tetrahedral PO43− inhibits horizontal growth of (Sb4S(e)6)n ribbons due to size effects, thus achieving desirable [hk1] orientation. Moreover, the introduction PO43− effectively passivates the antisite defect SbS1. These synergistic effects have effectively improved carrier transport and reduced non-radiative recombination of the Sb2(S,Se)3 absorber. Consequently, the DSP-modified Sb2(S,Se)3 device efficiency increases from 8.59% to 10.67%.

Abstract Image

Abstract Image

10.67%高效硒化锑太阳能电池的PO43 -四面体辅助螯合工程
硒化硫化锑(Sb2(S,Se)3)吸收剂的各向异性输运和深层缺陷是制约这种新型薄膜太阳能电池光电性能的两个重要原因。本文提出基于水热沉积法制备高质量Sb2(S,Se)3薄膜的螯合工程,利用四面体PO43−离子在二碱性磷酸钠(Na2HPO4, DSP)中实现理想的载流子输运和缺陷钝化。PO43 - Lewis结构一方面以[(SbO)3(PO4)]螯合物的形式吸附在硫化镉(cd)层的极性平面上,促进非均相成核,另一方面由于尺寸效应,四面体PO43 -抑制(Sb4S(e)6)n带的水平生长,从而获得理想的[hk1]取向。此外,PO43−的引入有效地钝化了对位缺陷SbS1。这些协同效应有效地改善了载流子输运,减少了Sb2(S,Se)3吸收剂的非辐射复合。因此,dsp修饰的Sb2(S,Se)3器件效率从8.59%提高到10.67%。
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来源期刊
Advanced Materials
Advanced Materials 工程技术-材料科学:综合
CiteScore
43.00
自引率
4.10%
发文量
2182
审稿时长
2 months
期刊介绍: Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.
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