Time-evolving photo-induced changes of luminescent and spectral properties of PbS quantum dots sols

被引：0

作者：

Evstropiev, S. K. ^{[1
,2
]}

Kislyakov, I. M. ^{[1
,2
]}

Bagrov, I. V. ^{[1
]}

Belousova, I. M. ^{[1
,2
]}

Kiselev, V. M. ^{[1
]}

机构：

[1] SI Vavilov State Opt Inst, Dept Nanophoton, 5-2 Kadetskaya Line, St Petersburg 199053, Russia

[2] ITMO Univ, Int Res Lab Nonlinear Opt Informat, 49 Kronverksky Pr, St Petersburg 197101, Russia

来源：

OPTICS COMMUNICATIONS | 2016年 / 366卷

关键词：

Quantum dots; Nanostructures; luminescence; Sol;

D O I：

10.1016/j.optcom.2015.12.060

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Light irradiation influence on spectral and luminescent properties of PbS sol, stabilized by high-molecular polyvinylpyrrolidone, was studied as a time-evolving process. Uniform and stable for at least three months PbS/PVP suspensions were obtained with an average quantum dots size of 4 nm. Photo luminescent spectra of the suspensions showed wide intensive emission at 1000-1400 nm upon excitation by visible light. Luminescence intensities of all the suspensions demonstrate nonlinear dependences on the exciting radiation intensity. Experimental results show that light irradiation during luminescence measurements even with low excitation power density can significantly change luminescent and spectral properties of PbS quantum dots. The dependences found can be useful in preparation of a variety of quantum dots-containing photonics materials. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：282 / 284

页数：3

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