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Exploration of bluish violet‐emitting phosphor Ca 3 Al 4 ZnO 10 :Ti 4+ with enhanced emission by Ca 2+ vacancies
Author(s) -
Zhou Zhi,
Zhong Yuan,
Gu Simin,
Su Yifeng,
Xia Mao,
Zhang Yongli,
Zhou Nan,
Wang Jing
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16065
Subject(s) - phosphor , photoluminescence , materials science , analytical chemistry (journal) , excited state , doping , band gap , quenching (fluorescence) , emission spectrum , luminescence , fluorescence , optoelectronics , chemistry , optics , atomic physics , spectral line , physics , chromatography , astronomy
Abstract In this paper, we introduced a bluish violet‐emitting phosphor Ca 3 Al 4 ZnO 10 :Ti ( IV ) ( CAZO :Ti 4+ ) synthesized by high‐temperature solid‐state reaction. Upon 265 nm excitation, a broad emission band spanned from 300 nm to 500 nm and centered at 370 nm was observed. In addition, the effects of flux and charge compensation to photoluminescence properties of CAZO :Ti 4+ were systematically investigated. The results show that 103% improvement of emission intensity was achieved when 1% H 3 BO 3 flux was introduced and 32.8% enhancement of it for 2% Ca 2+ vacancies doped as charge compensator. Moreover, the lifetimes, band gap energy, concentration quenching mechanism, as well as electron transition process of CAZO :Ti 4+ were discussed. Due to the efficient broad bluish violet emission, this phosphor may find a potential application in mercury vapor‐excited fluorescent lamp for plant growth.