利用近红外间接带隙 AgBiS2 纳米晶体实现三重感光光子上转换

IF 15.6 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of the American Chemical Society Pub Date : 2025-04-09 DOI:10.1021/jacs.5c04015

Kin Ting Chang, Wenfei Liang, Shaokuan Gong, Pang Ho Yeung, Jianning Feng, Xihan Chen, Haipeng Lu

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引用次数: 0

摘要

胶体半导体纳米晶体（NCs）由于其不同的材料组成和光谱可调性，最近成为理想的三重态敏化剂。然而，能够有效敏化近红外到可见光光子上转换的纳米材料仍然主要局限于有毒的铅基纳米材料。在这里，我们提出了一种新的基于AgBiS2 NCs的无铅，近红外，间接带隙敏化剂，实现了近红外到黄色的上转换，量子产率达到10.5%（归一化到100%）。成功的关键是精确的AgBiS2 NCs的化学计量控制，它为辐射重组和三重态能量转移提供了必要的表面状态。超快瞬态吸收光谱验证了表面态介导的高效三重态能量传递机制。我们的工作提出了一种新的环保材料体系，用于高效的三态融合近红外光子上转换。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Triplet Sensitization Photon Upconversion Using Near-Infrared Indirect-Bandgap AgBiS2 Nanocrystals

查看原文本刊更多论文

Triplet Sensitization Photon Upconversion Using Near-Infrared Indirect-Bandgap AgBiS2 Nanocrystals

Colloidal semiconductor nanocrystals (NCs) have recently emerged as ideal triplet sensitizers owing to their diverse material composition and spectral tunability. However, the NCs that can efficiently sensitize near-infrared-to-visible photon upconversion remain largely limited to toxic lead-based NCs. Here, we present a new lead-free, near-infrared, indirect-bandgap sensitizer based on AgBiS₂ NCs, enabling near-infrared-to-yellow upconversion with a quantum yield reaching 10.5% (normalized to 100%). The key to success is the precise stoichiometry control of AgBiS₂ NCs, which provides the essential surface states for both radiative recombination and triplet energy transfer. Ultrafast transient absorption spectroscopy verifies the efficient triplet energy transfer mechanism mediated by surface states. Our work presents a new eco-friendly material system for efficient triplet fusion near-infrared photon upconversion.

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来源期刊

Journal of the American Chemical Society 化学-化学综合

CiteScore

24.40

自引率

6.00%

发文量

2398

审稿时长

1.6 months

期刊介绍： The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.