Effect of solvents on optical properties and dynamics of exciton states in quantum dots CdZnS/ZnS doped with Mn2+

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Дәйексөз келтіру

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Аннотация

The dynamics of differential absorption spectra of Mn2+ : Zn0.48Cd0.52S/ZnS quantum dots (QDs) after excitation with a femtosecond (fs) pulse of 360 nm in aprotonic nonpolar cyclohexane and polar propylene carbonate solvents in comparison with the protonic polar solvent water has been studied by femtosecond laser spectroscopy method. The absorption and luminescence spectra of QDs in water revealed bands related to trapped states. The fading band related to the edge exciton of QD attenuates significantly faster in water than in aprotonic solvents, which suggests rapid electron transfer from the 1Se level to trap states in competition with electron transfer to manganese. Apparently, the competition of these processes is the reason for the decrease in the quantum yield of manganese luminescence in Mn2+ : Zn0.48Cd0.52S/ZnS when passing from aprotonic solvents to water.

Авторлар туралы

A. Vasin

Moscow Institute of Physics and Technology; N.N. Semenov Federal Research Center for Chemical Physics of the RAS

Хат алмасуға жауапты Автор.
Email: a2vasin@yandex.ru
Ресей, Dolgoprudny; Moscow

A. Dobryakov

Moscow Institute of Physics and Technology; N.N. Semenov Federal Research Center for Chemical Physics of the RAS

Email: a2vasin@yandex.ru
Ресей, Dolgoprudny; Moscow

A. Kostrov

Moscow Institute of Physics and Technology; N.N. Semenov Federal Research Center for Chemical Physics of the RAS

Email: a2vasin@yandex.ru
Ресей, Dolgoprudny; Moscow

E. Koroznikova

Moscow Institute of Physics and Technology

Email: a2vasin@yandex.ru
Ресей, Dolgoprudny

F. Gostev

Moscow Institute of Physics and Technology; N.N. Semenov Federal Research Center for Chemical Physics of the RAS

Email: a2vasin@yandex.ru
Ресей, Dolgoprudny; Moscow

I. Shelaev

Moscow Institute of Physics and Technology; N.N. Semenov Federal Research Center for Chemical Physics of the RAS

Email: a2vasin@yandex.ru
Ресей, Dolgoprudny; Moscow

O. Antonova

N.N. Semenov Federal Research Center for Chemical Physics of the RAS

Email: a2vasin@yandex.ru
Ресей, Moscow

S. Kochev

A.N. Nesmeyanov Institute of Organoelement Compounds of the RAS

Email: a2vasin@yandex.ru
Ресей, Moscow

V. Nadtochenko

Moscow Institute of Physics and Technology; N.N. Semenov Federal Research Center for Chemical Physics of the RAS

Email: a2vasin@yandex.ru
Ресей, Dolgoprudny; Moscow

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