Temperature- and Size-Dependent Photoluminescence of CuInS<sub>2</sub> Quantum Dots

Oleg Korepanov; Dmitriy Kozodaev; Olga Aleksandrova; Alexander Bugrov; Dmitrii Firsov; Demid Kirilenko; Dmitriy Mazing; Vyacheslav Moshnikov; Zamir Shomakhov

doi:10.3390/nano13212892

Nanomaterials (Nov 2023)

Temperature- and Size-Dependent Photoluminescence of CuInS<sub>2</sub> Quantum Dots

Oleg Korepanov,
Dmitriy Kozodaev,
Olga Aleksandrova,
Alexander Bugrov,
Dmitrii Firsov,
Demid Kirilenko,
Dmitriy Mazing,
Vyacheslav Moshnikov,
Zamir Shomakhov

Affiliations

Oleg Korepanov: Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University “LETI”, 197022 Saint Petersburg, Russia
Dmitriy Kozodaev: Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University “LETI”, 197022 Saint Petersburg, Russia
Olga Aleksandrova: Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University “LETI”, 197022 Saint Petersburg, Russia
Alexander Bugrov: Department of Physical Chemistry, Saint Petersburg Electrotechnical University “LETI”, 197022 Saint Petersburg, Russia
Dmitrii Firsov: Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University “LETI”, 197022 Saint Petersburg, Russia
Demid Kirilenko: Ioffe Institute, 194021 Saint Petersburg, Russia
Dmitriy Mazing: Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University “LETI”, 197022 Saint Petersburg, Russia
Vyacheslav Moshnikov: Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University “LETI”, 197022 Saint Petersburg, Russia
Zamir Shomakhov: Institute of Informatics, Electronics and Robotics, Kabardino-Balkarian State University, n.a. Kh.M. Berbekov, 360004 Nalchik, Russia

DOI: https://doi.org/10.3390/nano13212892
Journal volume & issue: Vol. 13, no. 21
p. 2892

Abstract

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We present the results of a temperature-dependent photoluminescence (PL) spectroscopy study on CuInS2 quantum dots (QDs). In order to elucidate the influence of QD size on PL temperature dependence, size-selective precipitation was used to obtain several nanoparticle fractions. Additionally, the nanoparticles’ morphology and chemical composition were studied using transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The obtained QDs showed luminescence in the visible–near infrared range. The PL energy, linewidth, and intensity were studied within an 11–300 K interval. For all fractions, a temperature decrease led to a shift in the emission maximum to higher energies and pronounced growth of the PL intensity down to 75–100 K. It was found that for large particle fractions, the PL intensity started to decrease, with temperature decreasing below 75 K, while the PL intensity of small nanoparticles remained stable.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

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