期刊
DALTON TRANSACTIONS
卷 50, 期 34, 页码 11793-11803出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1dt02088a
关键词
-
资金
- Research and Development Plan for the Science and Technology Department of Gansu Province [18YF1NA104]
The study introduced a deep-red emitting phosphor CaMgAl10O17:Mn4+ with an ultra-wide response range, showing a high quantum efficiency of 86.7% and suitable for use as an LED light source for plant growth.
The auxiliary light equipment for plant growth requires phosphor-converted light-emitting-diodes (pc-LEDs) with high luminous efficiency and a stable structure, and the properties of phosphors highly determine the performance of the pc-LEDs. This work reports a deep-red emitting phosphor with an ultra-wide response range which is regarded as CaMgAl10O17:Mn4+. The absorption range spans the ultraviolet, near-ultraviolet, blue, and green light regions from 250 to 550 nm. Under the excitation of the best excitation position at 343 nm, deep-red light at 654 nm is emitted, and the quantum efficiency is as high as 86.7%. The luminous efficiency of the two pc-LED devices prepared based on CaMgAl10O17:Mn4+ with 395 and 460 nm chips reached 54.3 and 59.6 lm W-1, respectively. The spectra of the two pc-LEDs exhibit high resemblance to the absorption spectra of chlorophyll A and B in plant growth photosynthesis. These indicate that the CaMgAl10O17:Mn4+ phosphor can be an excellent candidate for plant growth LED light.
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