journal article·2025-04-11Open access

Vacancy-Catalyzed Cation Homogenization for High-Performance AgBiS2 Nanocrystal Solar Cells

Yang Liu, Zitao Ni, Lucheng Peng, Hao Wu, Zeke Liu, Yongjie Wang, Wanli Ma, Gerasimos Konstantatos

ACS Energy Letters· Volume 10· Issue 4

Abstract

Environmentally friendly silver bismuth sulfide (AgBiS 2 ) nanocrystals (NCs) are promising solution-processed absorbers for photovoltaic applications. Cation disorder nonhomogeneity has been considered as a prevalent obstacle, significantly impacting the optoelectronic properties of AgBiS 2 films. In this work, we developed a vacancy-assisted strategy to mitigate the energy barriers for the cation homogenization process in AgBiS 2 NC films. Chloride ions are introduced to induce surface vacancies, leading to improved cation homogeneity and enhanced absorption under low-temperature annealing. The resultant AgBiS 2 NC solar cells exhibited a power conversion efficiency (PCE) over 10%, the highest to date from a solid-state ligand-exchange method. Our strategy not only enables high-quality AgBiS 2 NC films but also provides an approach for engineering cation disorder in multinary materials.
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Research context

OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren’ai Road, Suzhou, 215123 Jiangsu, PR China

ICFO - Institut de Ciències Fotòniques

The Barcelona Institute of Science and Technology

International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy

Yunnan University

ICREA─Institució Catalana de Recerca i Estudis Avançats

Funding

Fundaci?n Cellex · Ministerio de Ciencia, Innovaci?n y Universidades · National Key Research and Development Program of China · European Regional Development Fund · Natural Science Foundation of Jiangsu Province · Centres de Recerca de Catalunya · China Scholarship Council · National Natural Science Foundation of China · H2020 European Research Council · Postgraduate Research and Practice Innovation Program of Jiangsu Province · Fundaci? Joan Ribes Araquistain · Special Fund for the ?Dual Carbon? Science initiative

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