胶体钙钛矿CsPbBr3量子点独特光谱特性的观察

IF 1.2 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Sangeun Cho, S. Noh, Hyungsang Kim, H. Im
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引用次数: 1

摘要

胶体钙钛矿cspbbr3量子点(QD)分散在掺杂PPO的辛烷中,观察到其独特的光谱特征。随着CsPbBr 3 -QD含量的增加,当量子点间距小于量子点直径时,由于形成量子点团簇,发射和吸收能量降低。在厄巴赫能量和载流子寿命中找到了支持量子点团簇的光谱证据。在傅里叶变换红外光谱中观察到异常的吸收谱线显示出明显的QD依赖性,这可以用结合PPO与CsPbBr 3 -QD杂化的振动模式来解释。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Distinctive Spectroscopic Characteristics Observed in Colloidal Perovskite CsPbBr3 Quantum Dot
Distinctive spectroscopic characteristics are observed in colloidal perovskite CsPbBr 3 quantum dot (QD) dispersed in octane doped with PPO. As the content of CsPbBr 3 -QD increases, the emission and the absorption energies decrease due to QD-cluster formed in case of the inter-QD distance smaller than diameter of QD. Spectroscopic evidences supporting QD-cluster are found in the Urbach energy and the carrier lifetime. Unusual absorption lines showing explicit QD dependence are observed in Fourier-transform infrared spectra, which is explained by vibrational modes of bound PPO hybridized with CsPbBr 3 -QD.
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来源期刊
CiteScore
1.40
自引率
12.50%
发文量
27
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