Rapid Grain Growth to Attain over 13% Certified Flexible CZTSSe Solar Cell

IF 18.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-09-01 DOI:10.1021/acsenergylett.5c02195

Han Xu, Nan Wang, Rutao Meng, Xuejun Xu, Yue Liu, Qianqian Gao, Jiabin Dong, Jianpeng Li, Ming Li, Li Wu and Yi Zhang*,

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引用次数: 0

Abstract

A high-quality absorber layer is crucial for highly efficient Cu₂ZnSn(S,Se)₄ (CZTSSe) solar cells. However, current research on absorber layer is mainly focused on the high-temperature selenization process. Herein, a rapid crystal growth is achieved via regulating the pre-annealing temperature. Lower pre-annealing temperature improves the microstructure of the precursor, which not only facilitates the penetration of Se but also possibly exerts the grain growth-promoting effect during selenization from Ag, thereby leading to improvement in absorber layer quality. Thus, the carrier separation and transport efficiency at grain boundaries are significantly enhanced, the bulk and interface defects are reduced, and the carrier recombination of a device is effectively suppressed. Finally, a flexible CZTSSe solar cell with a certified efficiency of 13.22% (aperture area) is obtained. This work reveals the impact of the pre-annealing process on crystal growth and puts forward an effective strategy to improve the quality of kesterite film.

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快速晶粒生长以获得超过13%的认证柔性CZTSSe太阳能电池

高质量的吸收层是高效Cu2ZnSn(S,Se)4 （CZTSSe）太阳能电池的关键。然而，目前对吸收层的研究主要集中在高温硒化过程上。本文通过调节预退火温度实现了晶体的快速生长。较低的预退火温度改善了前驱体的微观结构，不仅有利于Se的渗透，还可能在银的硒化过程中发挥促进晶粒生长的作用，从而提高吸收层的质量。从而显著提高了载流子在晶界处的分离和输运效率，减少了体积缺陷和界面缺陷，有效抑制了器件的载流子复合。最后，获得了一种经认证效率为13.22%（孔径面积）的柔性CZTSSe太阳能电池。本工作揭示了预退火工艺对晶体生长的影响，并提出了提高kesterite薄膜质量的有效策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.