Defect-Rich Boron-Doped Graphite for High-Performance Hole-Conductor-Free Mesoscopic Perovskite Solar Cells with Enhanced Back Interface Contact

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Materials Letters Pub Date : 2024-06-14 DOI:10.1021/acsmaterialslett.4c00799

Qiaojiao Gao, Xiaoyu Li, Jiale Liu, Kai Chen, Xufeng Xiao, Xiaoru Wang, Junwei Xiang, Anyi Mei* and Hongwei Han*,

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Abstract

Carbon-based hole-conductor-free perovskite solar cells (PSCs) exhibit promising potential on the road to commercialization for their low-cost production, scalable fabrication, and superior stability. However, the insufficient back interface contact between the carbon counter electrode (CE) and the perovskite is an urgent issue that hinders device performance. Herein, we report the preparation and application of defect-rich boron-doped graphite (BG) as the main CE medium for efficient printable mesoscopic PSCs (p-MPSCs). Boron doping induces the formation of abundant defective sites, including dangling bonds and oxygen-containing groups, onto the surface of graphite. These sites activate the inert surface and improve the surface affinity of CE with the perovskite. p-MPSCs based on BG achieve a firm interfacial contact, which improves the power conversion efficiency from 17.94% to 19.43% by enhancing charge collection.

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富硼掺杂缺陷石墨用于具有增强型背界面接触的高性能无孔介观过氧化物太阳能电池

碳基无空穴导体过氧化物太阳能电池（PSCs）以其低成本生产、可扩展的制造工艺和卓越的稳定性，在商业化的道路上展现出巨大的潜力。然而，碳对电极（CE）与包晶石之间的背界面接触不足是阻碍器件性能的一个紧迫问题。在此，我们报告了富含缺陷的掺硼石墨（BG）的制备和应用，并将其作为高效可印刷介观 PSCs（p-MPSCs）的主要 CE 介质。掺硼会在石墨表面诱导形成丰富的缺陷位点，包括悬空键和含氧基团。基于 BG 的 p-MPSC 实现了牢固的界面接触，通过增强电荷收集将功率转换效率从 17.94% 提高到 19.43%。

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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.