Mixed Halide Passivation of AgBiS2 Quantum Dots for High-Performance Photodetectors

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2024-11-04 DOI:10.1021/acsaelm.4c0164410.1021/acsaelm.4c01644

Defei Yuan, Zeyao Han, Fa Cao*, Xiao Liu, Mei Liu, Li Zhang, Shuang Cao, Junyu Li, Tao Zeng, Yunxia Chen, Xiaobao Xu and Bin Sun*,

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引用次数: 0

Abstract

AgBiS₂ quantum dots (QDs) have been undergoing rapid development in recent years because of their environmental friendliness, abundant elemental reserves, and high optical absorption coefficients. However, previously reported ligand exchange methods for AgBiS₂ CQDs have been ineffective in passivating surface defects, thereby limiting their potential for optoelectronic applications. In this study, we propose a facile solution-phase ligand exchange method assisted by mixed halides for the AgBiS₂ CQDs. This approach, involving AgCl and other halides, effectively suppresses surface defects and enhances the photodetector (PD) performance. The PD exhibits significantly improved optoelectronic characteristics, with a responsivity of 0.27 A W^–¹ and a low noise power density of 6.52 × 10^–9 A Hz^–0.5, achieving the highest specific detectivity of 2 × 10¹² Jones compared to previous reports of AgBiS₂ CQD PDs. This mixed halide passivation strategy introduces new insights into enhancing the performance of AgBiS₂ CQDs in PD applications.

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混合卤化物钝化 AgBiS2 量子点以实现高性能光电探测器

AgBiS2 量子点（QDs）因其环境友好、元素储量丰富、光吸收系数高等特点，近年来得到了快速发展。然而，之前报道的 AgBiS2 CQDs 配体交换方法在钝化表面缺陷方面效果不佳，从而限制了其光电应用的潜力。在本研究中，我们提出了一种由混合卤化物辅助的 AgBiS2 CQDs 便捷溶液相配体交换方法。这种方法涉及 AgCl 和其他卤化物，能有效抑制表面缺陷并提高光电探测器（PD）的性能。与之前报道的 AgBiS2 CQD 光电探测器相比，该光电探测器的光电特性有了明显改善，响应率达到 0.27 A W-1，噪声功率密度低至 6.52 × 10-9 A Hz-0.5，最高比检测率达到 2 × 1012 Jones。这种混合卤化物钝化策略为提高 AgBiS2 CQD 在 PD 应用中的性能提出了新的见解。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico