纳米晶
钙钛矿(结构)
电化学发光
材料科学
发光
玻璃碳
循环伏安法
量子点
电致发光
光发射
荧光粉
胶体
化学工程
光电子学
水溶液
纳米技术
化学
电化学
电极
物理化学
工程类
图层(电子)
作者
Zhixiong Cai,Feiming Li,Wei Xu,Shujun Xia,Jingbin Zeng,Shaogui He,Xi Chen
出处
期刊:Nano Research
[Springer Nature]
日期:2018-02-02
卷期号:11 (3): 1447-1455
被引量:45
标识
DOI:10.1007/s12274-017-1760-7
摘要
Perovskite nanocrystals (NCs), which have emerged as a new class of phosphors with superb luminescence properties and bandgaps that can be easily tuned using chemical methods, have generated tremendous interest for a wide variety of applications where colloidal quantum dots have been very successful as carrier sources. In this study, self-assembled films of CsPbBr3 NCs were produced via drop casting of colloidal NCs onto glassy carbon electrodes (GCEs) to form an NC film-modified electrode. The possible fabrication process of the CsPbBr3 NCs films was discussed. We further studied the anodic electrochemiluminescence (ECL) behavior of the perovskite CsPbBr3 NCs film using cyclic voltammetry with tripropylamine (TPA) as a coreactant, and a possible ECL mechanism was proposed. Briefly, TPA was oxidized to produce strongly reducing radical species, which can react with electrochemically oxidized CsPbBr3 NCs to generate excited CsPbBr3 NCs* capable of light emission. The relative stability of the ECL emission of the CsPbBr3 NC films under aqueous conditions was also investigated, and it was found that they showed operational stability over the first three hours, indicating suitable reliability for application as sensing materials. The results suggested that semiconducting perovskite NCs have great potential for application in the ECL field.
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