Tunable‐spectrum Mn2+ doped garnet transparent ceramics for high‐color rendering laser lighting.

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Bibliographic Details
Title:	Tunable‐spectrum Mn²⁺ doped garnet transparent ceramics for high‐color rendering laser lighting.
Authors:	Cao, Yangfei^1,2 (AUTHOR), Han, Tao¹ (AUTHOR) danbaiht@126.com, Yang, Jiayao^1,2 (AUTHOR), Peng, Lingling¹ (AUTHOR), Cao, Shixiu¹ (AUTHOR), Liu, Bitao¹ (AUTHOR), Tian, Zhongqing² (AUTHOR), Gao, Wei^3,4 (AUTHOR)
Source:	International Journal of Applied Ceramic Technology. May/Jun2021, Vol. 18 Issue 3, p716-723. 8p.
Subjects:	Transparent ceramics, Electron cloud effect, Garnet, Semiconductor lasers, Energy transfer, Lasers
Abstract:	Laser diodes (LDs) packaged with transparent ceramics show the low thermal expansion coefficient and high thermal conductivity, but there is a problem of the low color render index (CRI) owing to the lack of red component in current transparent ceramics. Mn2+ doped garnet transparent ceramics with adjustable color from yellow to red have been prepared via a solid‐state reaction‐vacuum sintering process, which have a high transmittance of 78.6% at 800 nm. Two main emission peaks of this ceramic are monitored at 590 and 749 nm, and the gratifying luminous performance improvement is obtained due to the charge compensation effect, electron cloud expansion effect, and efficient energy transfer. LD system fabricated with the obtained ceramics and blue LD shows a high‐CRI of 80, low correlated color temperature of 4098 K, and good luminous efficiency of 96.91 m/W. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Laser diodes (LDs) packaged with transparent ceramics show the low thermal expansion coefficient and high thermal conductivity, but there is a problem of the low color render index (CRI) owing to the lack of red component in current transparent ceramics. Mn2+ doped garnet transparent ceramics with adjustable color from yellow to red have been prepared via a solid‐state reaction‐vacuum sintering process, which have a high transmittance of 78.6% at 800 nm. Two main emission peaks of this ceramic are monitored at 590 and 749 nm, and the gratifying luminous performance improvement is obtained due to the charge compensation effect, electron cloud expansion effect, and efficient energy transfer. LD system fabricated with the obtained ceramics and blue LD shows a high‐CRI of 80, low correlated color temperature of 4098 K, and good luminous efficiency of 96.91 m/W. [ABSTRACT FROM AUTHOR]
ISSN:	1546542X
DOI:	10.1111/ijac.13685