Specifics of the spectral and luminescent properties of ensembles of colloidal quantum dots


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Abstract

Using colloidal solutions of ZnS-shell indium phosphide quantum dots with two average sizes of 2.1 and 3.0 nm and a size distribution variance of 10%, it has been shown that the luminescence and the luminescence excitation spectra of the colloidal quantum dots substantially depend on the wavelength of exciting light and the detection wavelength, respectively, with both the relationships being nonlinear in character, which may indicate the bimodal type of the size distribution function. Similar measurements for CdSe colloidal quantum dots with an average particle size of dav = 2.5 nm and a variance of 6% have shown that the effect of dependence of the luminescence peak position on the excitation wavelength is manifested to a much lesser extent.

About the authors

S. B. Brichkin

Institute of Problems of Chemical Physics

Author for correspondence.
Email: brichkin@icp.ac.ru
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

M. G. Spirin

Institute of Problems of Chemical Physics

Email: brichkin@icp.ac.ru
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

E. G. Mart’yanova

Institute of Problems of Chemical Physics

Email: brichkin@icp.ac.ru
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

D. A. Kozhukhina

Lipetsk State Technical University

Email: brichkin@icp.ac.ru
Russian Federation, Moskovskaya ul. 30, Lipetsk, 398600

V. V. Trepalin

Faculty of Fundamental Physicochemical Engineering

Email: brichkin@icp.ac.ru
Russian Federation, Moscow, 119991

V. F. Razumov

Institute of Problems of Chemical Physics; Faculty of Fundamental Physicochemical Engineering

Email: brichkin@icp.ac.ru
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432; Moscow, 119991

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