Highly efficient and dual broad emitting light convertor: an option for next- generation plant growth LEDs
Highly efficient and dual broad emitting light convertor: an option for next- generation plant growth LEDs
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高效双宽发射光转换器：下一代植物生长 LED 的选择
DOI：
10.1039/c8tc06115g
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发表时间：
2019-03-28
影响因子：
6.4
通讯作者：
Lei, Bingfu
中科院分区：
文献类型：
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作者：
Li, Mingcai;Zhang, Xuejie;Lei, Bingfu
目前，用于植物照明的蓝红复合LED光源主要由蓝光和红光组成;蓝光由氮化镓LED芯片提供，但半高宽（FWHW）仅约25 nm，而植物光合作用所需的蓝光更宽。针对这一问题，本文报道了一种双发光玻璃包荧光粉（Dual-PiGP），其中BaMgAl_（10）O_（17）：Eu ~（2+）（BAM）和CaAlSiN_3：Eu ~（2+）（CASN）分别提供蓝光和红光发射。Dual-PiGP显示出几个优点，包括93.90%的高量子效率，上级热稳定性（在25 ° C下的峰强度的80.1%@150 ° C），以及在446和645 nm处分别具有50和106 nm的半峰全宽（FWHM）的双宽光谱。此外，使用Dual-PiGP和385 nm发射LED芯片成功制造了用于室内植物工厂的概念验证Dual-PiGP植物灯，产生与叶绿素的吸收光谱很好匹配的蓝光（400-500 nm）和红光（580-780 nm）发射。在室内应用Dual-PiGP植物灯栽培意大利生菜，并选择由LED芯片组装的商业植物灯作为参考。栽培结果表明，意大利生菜的生物量比使用商业植物灯栽培的意大利生菜高12.12%。进一步的分析还证明，可溶性蛋白质和总叶绿素含量也得到了提高。Dual-PiGP光转换器策略为下一代植物生长LED提供了一种选择。
At present, blue-red composite LED light sources used for plant lighting are mainly composed of blue light and red light; the blue light is provided by gallium nitride LED chips, but the full-width at half-maximum (FWHW) is only approximately 25 nm, while the blue light required by plants for photosynthesis is wider. Focusing on this problem, this work reported that a dual emitting phosphor-in-glass plate (Dual-PiGP) was prepared towards a high power and dual broadband emitter, in which BaMgAl10O17:Eu2+ (BAM) and CaAlSiN3:Eu2+ (CASN) provide blue and red emission, respectively. Dual-PiGP exhibited several merits, including a high quantum efficiency of 93.90%, a superior thermal stability (80.1%@150 degrees C of the peak intensity at 25 degrees C), and a dual broad spectrum with a full-width at half-maximum (FWHM) of 50 and 106 nm at 446 and 645 nm, respectively. Moreover, a proof-of-concept Dual-PiGP plant lamp for application in indoor plant factories was successfully fabricated with Dual-PiGP and a 385 nm emitting LED chip, yielding blue- (400-500 nm) and red-light (580-780 nm) emission that matches well with the absorption spectrum of chlorophyll. The Dual-PiGP plant lamps were applied indoors to cultivate Italian lettuce, and commercial plant lamps assembled by LED chips were chosen as reference. The cultivation results indicated that the biomass of Italian lettuce was 12.12% greater than those cultivated using commercial plant lamps. Further analysis also certificated that the content of soluble protein and total chlorophyll were also improved. The Dual-PiGP light converter strategy provides an option for next-generation plant growth LEDs.