Cr3+ Activated Garnet Phosphor with Efficient Blue to Far-Red Conversion for pc-LED

doi:10.1002/adom.202101134

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	Cr3+ Activated Garnet Phosphor with Efficient Blue to Far-Red Conversion for pc-LED
	H. Xiao; J. Zhang; L. Zhang; H. Wu; H. Wu; G. Pan; F. Liu and J. Zhang
	2021
发表期刊	Advanced Optical Materials
ISSN	21951071
卷号	9 期号:20
摘要	Far-red (FR) phosphor-converted light-emitting diodes (pc-LEDs) driven by blue LED chips are novel light sources for applications in phototherapy, photosynthesis, natural light simulation, and so on but still bear low electricity-to-FR light conversion efficiency ( 23%) due to deficiency of phosphors that have both high blue light absorptance and high FR internal quantum efficiency (IQE) for the realization of efficient blue to FR conversion. FR Ca3Sc2Si3O12 (CSSG):Cr3+ garnet phosphor has ultra-high IQE (90%) but low blue light absorption. Here, a twofold increase of blue light absorption cross-section is reported with still high FR IQE via Lu3+Mg2+ substitution for Ca2+Sc3+ in CSSG:Cr3+ to form Ca3xLuxMgxSc2xSi3O12:Cr3+ garnet solid solution, which is attributed to enhanced mixing of odd-parity configuration into 3d configuration of Cr3+ induced by the cations substitution. Optical properties, crystal field strengths, and thermal stabilities of the solid solution phosphors are studied as a function of x. After complete replacement of Sc3+, the as-fabricated FR pc-LED emits at 750nm with 65.7% blue-to-FR quantum conversion efficiency and consequently offers an electricity-to-FR light conversion efficiency over 30%. Moreover, the solid solution phosphors show high quenching temperatures in the range of 580610 K. The results can advance the development of efficient FR phosphors and pc-LEDs for various applications. 2021 Wiley-VCH GmbH
DOI	10.1002/adom.202101134
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收录类别	SCI ; EI
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65119
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	H. Xiao,J. Zhang,L. Zhang,et al. Cr3+ Activated Garnet Phosphor with Efficient Blue to Far-Red Conversion for pc-LED[J]. Advanced Optical Materials,2021,9(20).
APA	H. Xiao.,J. Zhang.,L. Zhang.,H. Wu.,H. Wu.,...&F. Liu and J. Zhang.(2021).Cr3+ Activated Garnet Phosphor with Efficient Blue to Far-Red Conversion for pc-LED.Advanced Optical Materials,9(20).
MLA	H. Xiao,et al."Cr3+ Activated Garnet Phosphor with Efficient Blue to Far-Red Conversion for pc-LED".Advanced Optical Materials 9.20(2021).

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