Exploration of bluish violet‐emitting phosphor Ca3Al4ZnO10:Ti4+ with enhanced emission by Ca2+ vacancies

In this paper, we introduced a bluish violet‐emitting phosphor Ca3Al4ZnO10:Ti (IV) (CAZO:Ti4+) 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 c...

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Bibliographic Details
Published inJournal of the American Ceramic Society Vol. 102; no. 4; pp. 1843 - 1851
Main Authors Zhou, Zhi, Zhong, Yuan, Gu, Simin, Su, Yifeng, Xia, Mao, Zhang, Yongli, Zhou, Nan, Wang, Jing
Format Journal Article
LanguageEnglish
Published Columbus Wiley Subscription Services, Inc 01.04.2019
Subjects
Calcium ions
Chemical synthesis
Electron transitions
Emission analysis
Energy gap
Fluorescence
Fluorescent lamps
luminescence
Mercury (metal)
Mercury vapor
phosphors
Photoluminescence
Vacancies
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Summary:In this paper, we introduced a bluish violet‐emitting phosphor Ca3Al4ZnO10:Ti (IV) (CAZO:Ti4+) 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:Ti4+ were systematically investigated. The results show that 103% improvement of emission intensity was achieved when 1% H3BO3 flux was introduced and 32.8% enhancement of it for 2% Ca2+ vacancies doped as charge compensator. Moreover, the lifetimes, band gap energy, concentration quenching mechanism, as well as electron transition process of CAZO:Ti4+ 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.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.16065