Prebedded Sacrificing Layer for Developing Strain Released and Phase Pure CsPbBr3 Perovskite Solar Cells

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Materials Letters Pub Date : 2025-01-23 DOI:10.1021/acsmaterialslett.4c0210110.1021/acsmaterialslett.4c02101

Shihui Zhu, Yuxia Yin, Teng Zhang*, Chenhao Song, Yuxin Chen, Lian Peng, Heyuan Liu and Xiyou Li*,

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Abstract

In this study, strain-induced cracks and a lead-rich impurity phase (CsPb₂Br₅) have been detected at the buried interface of the two-step prepared CsPbBr₃ films. To solve this problem, a sacrificing layer (CsAc) was introduced before the deposition of the PbBr₂ precursors. This provides enough cesium precursors for the afterward CsPbBr₃ growth. Besides, the CsAc sacrificing layer brings more holes in the prepared PbBr₂ films, which benefits the volume expansion during the PbBr₂ to CsPbBr₃ conversion. Thus, residual strain released films can be expected. With the assistance of the CsAc sacrificing layer, the performance of our CsPbBr₃ devices can be improved from 7.70% (control) to 10.07% (6% CsAc assisted) with enhanced stability. Finally, we introduce a sacrificing layer assisted strategy for preparing strain released and phase pure CsPbBr₃ films, and this strategy might also be applicable to other types of PSCs.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.

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