New efficient lighting device. Part 1. hybrid materials based on inorganic aerogel and metal-organic phosphor

被引：2

作者：

Lebedev, Artem ^{[1
]}

Suslova, Ekaterina ^{[1
]}

Runina, Kristina ^{[1
]}

Khomyakov, Andrew ^{[1
]}

Zykova, Marina ^{[1
]}

Petrova, Olga ^{[1
]}

Avetisov, Roman ^{[1
]}

Shepel, Denis ^{[2
,3
]}

Astafiev, Artyom ^{[2
]}

Menshutina, Natalia ^{[1
]}

Avetissov, Igor ^{[1
]}

机构：

[1] Mendeleev Univ Chem Technol Russia, Moscow, Russia

[2] RAS, NN Semenov Fed Res Ctr Chem Phys, Moscow, Russia

[3] Technoinfo LTD, London, England

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2021年 / 302卷

关键词：

Organic-inorganic hybrid; Silica aerogel; Metal-organic phosphor; Luminescence; TEMPERATURE; FILMS;

D O I：

10.1016/j.jssc.2021.122358

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A novel luminescent organic-inorganic hybrid material "LightSil" (hereinafter referred to as HM-LS) has been fabricated. Tris (8-hydroxyquinolate)aluminum (Alq(3)) purified by vacuum sublimation to 99.999 wt% was used as an organic phosphor. Silica aerogel was used as an inorganic matrix. Alq(3) 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 supercritical dried in a carbon dioxide environment under a pressure of 120 bar, at 40 degrees 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 = 73 nm, FWHMHM-LS = 113 +/- 3 nm relative to Alq(3) powder PL spectrum. The latter indicated on a change in the electronic structure of Alq(3) in HM-LS in comparison with the nominally pure Alq(3) and this proved the formation of a new hybrid material.

引用

页数：12

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