Enhanced red emission in CaMoO4 : Bi3+,Eu3+

	Enhanced red emission in CaMoO4 : Bi3+,Eu3+
其他题名	论文其他题名
	Yan S. X.; Zhang J. H.; Zhang X.; Lu S. Z.; Ren X. G.; Nie Z. G.; Wang X. J.
	2007
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	111 期号:35 页码:13256-13260
摘要	We report the observation of enhanced red emission at 613 nm originating from D-5(0) -> F-7(2) transition of EU3+-doped CaMoO4 with Bill as an additive, under excitation either into the L-5(6) state with 395 nm or the 5 D-2 state with 465 urn. The luminescence properties as a function of Bi3+ and Eu3+ concentrations are studied. Strongly enhanced red emission of Eu3+ is obtained by adding Bi3+ instead of increasing the Eu3+ concentration. For a fixed Eu3+ concentration, there is an optimal B i(3+) concentration, at which the maximum luminescence intensity is achieved. The red emission of CaMoO4:0.05Eu(3+) is enhanced by a factor of 3 as 0.2 Bi3+ is co-doped into the system, stronger than that of commercial Y2O2S:Eu3+ and Y203:Eu3+ phosphors. Lifetime and diffuse reflection spectra measurements indicate that the red emission enhancement is due to the enhanced transition probabilities from the ground state to L-5(6) and D-5(2) states of Eu3+ in the distorted crystal field in which it is considered that more odd-rank crystal field components are induced by crystal structural distortion and symmetry decreasing with the addition of Bi3+, leading to more opposite parity components, for example, 4-15d states, mixed into the 46 transitional levels of Eu3+. The energy transfer from Bi3+ to Eu3+ also occurs and is discussed. The present material is a promising red-emitting phosphor for white light diodes with nearUV/blue GaN-based chips.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/26532
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Yan S. X.,Zhang J. H.,Zhang X.,et al. Enhanced red emission in CaMoO4 : Bi3+,Eu3+[J]. Journal of Physical Chemistry C,2007,111(35):13256-13260.
APA	Yan S. X..,Zhang J. H..,Zhang X..,Lu S. Z..,Ren X. G..,...&Wang X. J..(2007).Enhanced red emission in CaMoO4 : Bi3+,Eu3+.Journal of Physical Chemistry C,111(35),13256-13260.
MLA	Yan S. X.,et al."Enhanced red emission in CaMoO4 : Bi3+,Eu3+".Journal of Physical Chemistry C 111.35(2007):13256-13260.

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