Synthesis and luminescent properties of polymer‐silica multilayer‐encapsulated perovskite quantum dots for optoelectronics. Issue 1 (19th September 2019)

• Record Type: Journal Article
• Authors: Liu, Shuang‐De; Chen, Teng‐Ming
• Is Part Of: Journal of the Chinese Chemical Society. Volume 67:Issue 1(2020)
• Page Start: 109
• Page End: 115
• Publication Date: 2019-09-19
• Subjects: CsPbX3 (X = cl, Br, I) -- EL spectrum -- IPQDs -- photoluminescence -- white LED; Chemistry -- Periodicals; Electronic journals; 540.5
• DOI: 10.1002/jccs.201800432
• Languages: English
• ISSNs: 0009-4536

Abstract

Abstract: Hydrophobic all‐inorganic perovskite quantum dots (IPQDs) CsPbX3 (X = Cl, Br, and I) were synthesized using conventional solution methods. IPQDs are potential materials for lasers, solar cells, and displays because of their narrow full width at half‐maximum, optically tunable wavelength, and great photoluminescence quantum yield. Their shortcomings are structurally unstable and moisture sensitive. To overcome the poor stability, we have developed a chemical modification to form GQD + PMAO@SiO2 that enhances their photoluminescence quantum yield (from 60 to ~90%), thermal stability (from 60 to ~90°C), and photochemical stability. The combination of the green‐emitting GQD + PMAO@SiO2 and red‐emitting RQD + PMAO with a 450 nm blue InGaN‐based LED chip was used to fabricate a white light emitting diode with the correlated color temperature (CCT) value of 6, 943 K and Commission Internationale del'Eclairage of (0.312, 0.290). Abstract : A white light emitting diode (WLED) device was fabricated by integrating green‐emitting GQD + PMAO@SiO2 with red emitting RQD + PMAO and a 450 nm blue LED. The corresponding electroluminescence (EL) spectrum shows correlated color temperature (CCT) and Commission Internationale del'Eclairage (CIE) color coordinates of the WLED device are 6, 943 K and (0.312, 0.290), respectively.