A novel strategy for boosting the photoluminescence quantum efficiency of CdSe nanocrystals at room temperature

A novel strategy for boosting the photoluminescence quantum efficiency of CdSe nanocrystals at room temperature
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提高 CdSe 纳米晶室温光致发光量子效率的新策略

DOI:
10.1016/j.cclet.2019.03.043
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发表时间:
2020
影响因子:
9.1
通讯作者:
Dong Angang
Dong Angang
中科院分区:
化学1区
文献类型:
--
作者:
Wang Biwei;Liu Limin;Zhang Yi;Deng Yonghui;Dong Angang

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高发光胶体纳米晶体在生物成像和各种光电器件中有着广泛的应用。本文报道了一种简单、温和的合成方法,即S2处理和二元配体钝化相结合的方法,可以有效地提高CdSe纳米晶的室温发光性能。经处理的CdSe纳米晶体的光致发光量子产率表现出急剧的增强(例如,对于CdSe纳米棒为188倍)。这里提出的方法可以应用于各种CdSe纳米晶体,无论其大小,形状和晶体结构。
Highly luminescent colloidal nanocrystals have wide applications in bioimaging and various optoelectronic devices. Herein we report a facile and mild procedure by combining S~2- treatment and binary ligand passivation, which can efficiently enhance the luminescent property of CdSe nanocrystals at room temperature. The photoluminescence quantum yield of as-treated CdSe nanocrystals exhibits drastic enhancement (e.g., 188 times for CdSe nanorods) after this dual-passivation treatment. The methodology proposed here can be applied to various CdSe nanocrystals, regardless of their sizes, shapes, and crystal structures.
胶体 CdSe 纳米晶体与 S2- 离子的尺寸依赖性配体交换
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