Damping of Cu-Associated Photoluminescence and Formation of Induced Absorption in Heavily Cu-Doped CdSe Quantum Dots

Aleksandr M. Smirnov, Anastasiya D. Golinskaya, Pavel A. Kotin, Sergey G. Dorofeev, Ekaterina V. Zharkova, Vladimir V. Palyulin, Vladimir N. Mantsevich, Vladimir S. Dneprovskii

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    4 Citations (Scopus)

    Abstract

    We studied photoluminescence (PL) properties and nonlinear absorption characteristics of heavily Cu-doped CdSe colloidal quantum dots (QDs) under nanosecond laser pulse excitation. A strong dependence of basic exciton transition behavior and Cu dopant-associated PL on the concentration of copper ions and pump intensities was revealed for the first time. The saturation of the copper-associated PL signal was found to happen much faster than the saturation of nonlinear absorption. The induced absorption and saturation of high energy transitions due to the exciton-exciton interaction were investigated in Cu-doped CdSe QDs. The obtained results could be useful for the development of optoelectronic devices operating at room temperature on the basis of Cu-doped colloidal QDs.

    Original languageEnglish
    Pages (from-to)27986-27992
    JournalJournal of Physical Chemistry C
    Volume123
    Issue number45
    DOIs
    Publication statusPublished - 2019

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