ntvНаучно-технический вестник информационных технологий, механики и оптикиScientific and Technical Journal of Information Technologies, Mechanics and Optics2226-14942500-0373Университет ИТМО10.17586/2226-1494-2026-26-4-724-731ntv-640Research ArticleОПТИЧЕСКИЕ СИСТЕМЫ И ТЕХНОЛОГИИOPTICAL ENGINEERINGЛюминесцентные свойства нанокристаллов CsPb(BrхCl1–х)3 во фторофосфатном стеклеLuminescent properties of CsPb(BrхCl1–х)3 nanocrystals in fluorophosphate glasshttps://orcid.org/0009-0002-7692-8449ВоробьевМ. В.VorobevM. V.

Воробьев Михаил Викторович — студент

Санкт-Петербург, 197101

Mikhail V. Vorobev — Student

Saint Petersburg, 197101

mikhailvorobiev1400@yandex.ruhttps://orcid.org/0009-0007-5100-852XШвецЕ. В.ShvetsE. V.

Швец Егор Вадимович — студент

Санкт-Петербург, 197101

Egor V. Shvets — Student

Saint Petersburg, 197101

nkkuzmenko@itmo.ruhttps://orcid.org/0000-0002-7213-8231КузьменкоН. К.KuzmenkoN. K.

Кузьменко Наталья Константиновна — младший научный сотрудник

sc 57216750549

Санкт-Петербург, 197101

Nataliya K. Kuzmenko – Junior Researcher

sc 57216750549

Saint Petersburg, 197101

kolobok106@rambler.ruhttps://orcid.org/0000-0002-0134-8434КолобковаЕ. В.KolobkovaE. V.

Колобкова Елена Вячеславовна — доктор химических наук, профессор, профессор

sc 57604636700

Санкт-Петербург, 190013

Санкт-Петербург, 197101

Elena V. Kolobkova — D.Sc. (Chemistry), Full Professor; Leading Researcher

sc 57604636700

Saint Petersburg, 190013

Saint Petersburg, 197101

kolobok106@rambler.ruУниверситет ИТМОРоссияITMO UniversityRussian FederationСанкт-Петербургский государственный технологический институт (технический университет); Университет ИТМОРоссияSaint Petersburg State Technological University (Technical University); ITMO UniversityRussian Federation202627082026264724731Copyright © Воробьев М.В., Швец Е.В., Кузьменко Н.К., Колобкова Е.В., 20262026Воробьев М.В., Швец Е.В., Кузьменко Н.К., Колобкова Е.В.Vorobev M.V., Shvets E.V., Kuzmenko N.K., Kolobkova E.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://ntv.elpub.ru/jour/article/view/640

Введение.  Получены нанокристаллы перовскита  CsPb(BrхCl1–х)3 при изменении содержания хлоридов и бромидов во фторофосфатном стекле методом закалки расплава и последующей термической обработки. Изменение отношения ионов хлора (Cl) и брома (Br) в стекле влияло на состав и, как следствие, на ширину запрещенной зоны ΔЕg перовскитных нанокристаллов, обеспечивая регулируемый спектр фотолюминесценции в диапазоне от зеленого до синего излучения. Изучены спектрально-люминесцентные свойства сформированных во фторофосфатном стекле нанокристаллов CsPb(BrхCl1–х)3 при изменении отношения Br/Cl. Метод. Фторофосфатные стекла с нанокристаллами CsPb(BrхCl1–х)3 получены методом высокотемпературного синтеза из шихтных реактивов с последующей дополнительной термообработкой выше температуры стеклования. Температура обработки определялась на основании данных дифференциальной сканирующей калориметрии с применением STA 449F1 Jupiter Nietzsche. Исследование спектров поглощения проводилось с помощью двухлучевого спектрофотометра Perkin Elmer Lambda 650. Спектры люминесценции были получены с использованием спектрофлуориметра Perkin Elmer LS50B. Абсолютный квантовый выход измерен благодаря системе контроля абсолютного квантового выхода фотолюминесценции (Hamamatsu) с блоком интегрирующей сферы. Основные результаты.  Нанокристаллы перовскита  CsPb(BrхCl1–х)3 при изменении отношения Br/Cl были сформированы во фторофосфатном стекле. Рост нанокристаллов в стекле контролировался изотермической обработкой при температурах выше Tg путем регулировки температуры и длительности. Данные оптических измерений подтвердили образование нанокристаллов CsPb(BrхCl1–х)3. При этом положение полосы фотолюминесценции нанокристаллов перовскита изменялось в диапазоне 430–512 нм. Было обнаружено уменьшение квантового выхода фотолюминесценции CsPb(BrхCl1–х)3 при увеличении концентрации Cl в составе нанокристалла.  Такой эффект можно связать с ростом безызлучательных каналов, происходящих в стекле: рост глубоких ловушечных состояний, усиление поверхностной рекомбинации. Обсуждение. Сделан вывод о том, что фторофосфатные стекла с  нанокристаллами CsPb(BrхCl1–х)3 можно использовать в качестве синих и зеленых люминофоров в области 450–500 нм.

 CsPb(BrхCl1–х)3 perovskite nanocrystals were synthesized in fluorophosphate glass by melt quenching followed by subsequent heat treatment. The variation of the chlorine (Cl) and bromine (Br) ion ratio in the glass affected the composition and, consequently, the band gap ΔЕg of the perovskite nanocrystals, enabling tunable photoluminescence from green to blue emission. The spectral and luminescent properties of CsPb(BrхCl1–х)3 nanocrystals formed in fluorophosphate glass were investigated for different Br/Cl ratios. Fluorophosphate glasses containing CsPb(BrхCl1–х)3 nanocrystals were prepared by high-temperature synthesis from batch chemicals followed by additional heat treatment above the glass transition temperature. The heat-treatment temperature was determined from differential scanning calorimetry data obtained using a STA 449F1 Jupiter Nietzsche analyzer. Absorption spectra were measured with a PerkinElmer Lambda 650 double-beam spectrophotometer. Photoluminescence spectra were recorded using a PerkinElmer LS50B spectrofluorometer. The absolute photoluminescence quantum yield was measured with a Hamamatsu absolute quantum yield measurement system equipped with an integrating sphere. CsPb(BrхCl1–х)3 perovskite nanocrystals with different Br/Cl ratios were successfully formed in fluorophosphate glass. The growth of nanocrystals in the glass matrix was controlled by isothermal treatment at temperatures above Tg through adjustment of the treatment temperature and duration. Optical measurements confirmed the formation of CsPb(BrхCl1–х)3 nanocrystals. The photoluminescence peak position shifted within the range of 430–512 nm. A decrease in the photoluminescence quantum yield of CsPb(BrхCl1–х)3 was observed with increasing Cl concentration in the nanocrystals. This effect can be attributed to the enhancement of nonradiative recombination pathways in the glass matrix, including the formation of deep trap states and increased surface recombination. It is concluded that fluorophosphate glasses containing CsPb(BrхCl1–х)3 nanocrystals can be used as blue and green phosphors in the 450–500 nm spectral range.

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The authors declare that there are no conflicts of interest present.