NEW EFFICIENT LIGHTING DEVICE. Part 1. HYBRID MATERIALS BASED ON INORGANIC AEROGEL AND METAL-ORGANIC PHOSPHOR

Lebedev, A.; Suslova, E.; Runina, K.; Khomyakov, A.; Zykova, M.; Petrova, O.; Avetisov, R.; Shepel, D.; Astafiev, A.; Menshutina, N.; Avetissov, I.

Авторы: Lebedev Artem, Suslova Ekaterina, Runina Kristina, Khomyakov Andrew, Zykova Marina, Petrova Olga, Avetisov Roman, Shepel Denis, Astafiev Artyom, Menshutina Natalia, Avetissov Igor
Журнал: Journal of Solid State Chemistry
Номер: 302
Год издания: 2021
Издательство: Elsevier B.V.
Местоположение издательства: Netherlands
Первая страница: 122358
Номер статьи: 122358
DOI: 10.1016/j.jssc.2021.122358
Аннотация: A novel luminescent organic-inorganic hybrid material “LightSil” (hereinafter referred to as HM-LS) has been fabricated. Tris (8-hydroxyquinolate)aluminum (Alq3) purified by vacuum sublimation to 99.999 wt% was used as an organic phosphor. Silica aerogel was used as an inorganic matrix. Alq3 intercalation into aerogel structure did not strongly influence on the HM-LS morphology characteristics comparing with the pure aerogel, which indicated that the intercalation had proceed on the molecular level. An aerogel based hybrid was supercriticaldried in a carbon dioxide environment under a pressure of 120 bar, at 40 C at a carbon dioxide consumption of 500 g/h. The synthesis conditions (TEOS:2-propanol ratio) has been optimized to make the HM-LS sample with the best photoluminescence (PL) characteristics. Analysis of the PL spectra showed that the PL peak maximum of HM-LS shifted to longer wavelengths, and the HM-LS spectrum itself broadened by 64%: FWHMAlq3 ¼ 73 nm, FWHMHM-LS ¼ 113 3 nm relative to Alq3 powder PL spectrum. The latter indicated on a change in the electronic structure of Alq3 in HM-LS in comparison with the nominally pure Alq3 and this proved the formation of a newhybrid material.
Добавил в систему: Аветисов Игорь Христофорович

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NEW EFFICIENT LIGHTING DEVICE. Part 1. HYBRID MATERIALS BASED ON INORGANIC AEROGEL AND METAL-ORGANIC PHOSPHORстатья

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