Narrowing the photoluminescence bandwidth of InP-based colloidal quantum dots through photon-triggered isolation

IF 1.7 4区 化学 Bulletin of the Korean Chemical Society Pub Date : 2024-05-10 DOI:10.1002/bkcs.12847
Hyekyeong Kwon, Byeong-Seo Cheong, Jiwon Bang
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Abstract

The optimization of photoluminescence (PL) spectral bandwidths in InP-based colloidal quantum dots (QDs) faces limitations with traditional synthetic methods. This study introduces a novel approach utilizing light-induced thiolate ligand detachment to selectively precipitate QDs within an ensemble, triggered by photons whose energy matches the red tail of the band-edge absorption peak. We demonstrate that incorporating benzoquinone as an electron acceptor under inert conditions crucially enhances the efficiency of photoexcited hole-induced ligand detachment. Through careful optimization of laser exposure conditions, we successfully narrowed the PL bandwidth of InP/ZnSe/ZnS QDs from 39 to 35 nm. Our findings offer significant insights into the development of high-performance QD-based displays, promising advancements in color purity.

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通过光子触发隔离缩小 InP 基胶体量子点的光致发光带宽
基于 InP 的胶体量子点(QDs)的光致发光(PL)光谱带宽的优化面临着传统合成方法的限制。本研究介绍了一种新方法,即利用光诱导硫醇配体分离,在光子能量与带边吸收峰红尾相匹配的情况下,选择性地析出集合中的 QDs。我们证明,在惰性条件下加入苯醌作为电子受体,可显著提高光激发空穴诱导配体脱落的效率。通过仔细优化激光照射条件,我们成功地将 InP/ZnSe/ZnS QDs 的聚光带宽从 39 纳米缩小到 35 纳米。我们的研究结果为开发基于 QD 的高性能显示器提供了重要启示,有望提高色彩纯度。
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来源期刊
Bulletin of the Korean Chemical Society
Bulletin of the Korean Chemical Society Chemistry-General Chemistry
自引率
23.50%
发文量
182
期刊介绍: The Bulletin of the Korean Chemical Society is an official research journal of the Korean Chemical Society. It was founded in 1980 and reaches out to the chemical community worldwide. It is strictly peer-reviewed and welcomes Accounts, Communications, Articles, and Notes written in English. The scope of the journal covers all major areas of chemistry: analytical chemistry, electrochemistry, industrial chemistry, inorganic chemistry, life-science chemistry, macromolecular chemistry, organic synthesis, non-synthetic organic chemistry, physical chemistry, and materials chemistry.
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