Giant Enhancement of Luminescence from Phosphors through Oxygen-Vacancy-Mediated Chemical Pressure Relaxation

doi:10.1002/adom.201700448

	Giant Enhancement of Luminescence from Phosphors through Oxygen-Vacancy-Mediated Chemical Pressure Relaxation
	Zhou, Y; Zhang, K; Ma, CG; Zhang, JY; Liu, BM; Guo, SQ; Xu, JY; Hou, JS; Fang, YZ; Zheng, LR
刊名	ADVANCED OPTICAL MATERIALS
	2017
卷号	5 期号:20 页码:1700448
关键词	chemical pressure external stimuli luminescence oxygen vacancy phosphors
ISSN号	2195-1071
DOI	10.1002/adom.201700448
文献子类	Article
英文摘要	Relaxing chemical pressure in phosphors with large-size-mismatched dopants, aiming at attaining high-efficiency luminescence and a higher dopant concentration, remains a challenging subject of continuous research effort. Originally seen as undesirable and detrimental to the performance of luminescent systems, this study demonstrates that the formation of a tiny amount of oxygen vacancies favors chemical pressure relaxation (CPR), resulting in topotactic transformation of poorly luminescent parent phases to highly luminescent cousins, as exemplified by a model system of Bi3+-doped Lu2O3. The integration of experimental observations with theoretical calculations reveals that the emergence of oxygen vacancies adjacent to Bi3+ can expand its size of coordination geometry, thus releasing the chemical pressure and significantly influencing the emission characteristics. Importantly, it is illustrated that the concept of oxygen-vacancy-mediated CPR is sufficiently general to allow the optimization of luminescence from other classes of foreign-ion-doped phosphors plagued by size mismatch. It is suggested that this concept can be applied to an array of optical materials in various forms, and also provides unique opportunities for tuning other properties of functional materials that are sensitive to local coordination environments of dopants.
WOS关键词	CATION SUBSTITUTION ; OXYNITRIDE PHOSPHORS ; OXIDE ; PHOTOLUMINESCENCE ; HYDRIDE ; REDUCTION ; PHASES ; TRANSFORMATION ; CONDUCTIVITY ; NANOCRYSTALS
WOS研究方向	Materials Science ; Optics
语种	英语
WOS记录号	WOS:000413024500011
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285298]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhou, Y,Zhang, K,Ma, CG,et al. Giant Enhancement of Luminescence from Phosphors through Oxygen-Vacancy-Mediated Chemical Pressure Relaxation[J]. ADVANCED OPTICAL MATERIALS,2017,5(20):1700448.
APA	Zhou, Y.,Zhang, K.,Ma, CG.,Zhang, JY.,Liu, BM.,...&郑黎荣.(2017).Giant Enhancement of Luminescence from Phosphors through Oxygen-Vacancy-Mediated Chemical Pressure Relaxation.ADVANCED OPTICAL MATERIALS,5(20),1700448.
MLA	Zhou, Y,et al."Giant Enhancement of Luminescence from Phosphors through Oxygen-Vacancy-Mediated Chemical Pressure Relaxation".ADVANCED OPTICAL MATERIALS 5.20(2017):1700448.