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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >White light emitting diodes with super-high luminous efficacy
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White light emitting diodes with super-high luminous efficacy

机译：具有超高发光效率的白光发光二极管

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摘要

We fabricated three types of high luminous efficacy white light emitting diodes (LEDs). The first was a white LED with a high luminous efficacy (η_l) of 249 lm W~(-1) and a high luminous flux (φ_v) of 14.4 lm at a forward-bias current of 20 mA. This η_l was approximately triple that of a tri-phosphor fluorescent lamp (90 lmW~(-1)). The blue LED used as the excitation source in this white LED had a high output power (φ_e) of 47.1 mW and a high external quantum efficiency (η_(ex)) of 84.3%. The second was a high-power white LED, fabricated from the above high-power blue LED, and had a high φ_e of 756 mW at 350 mA. φ_v and η_l of the high-power white LED were 203 lm and 183 lmW ~(-1) at 350 mA, respectively. The third was a high-power white LED fabricated from four high-power blue LED dies. φ_v and η_l of the high-power white LED were 1913 lm and 135 lmW ~(-1) at 1 A, respectively. The white LED had a higher flux than a 20 W-class fluorescent lamp and 1.5 times the luminous efficacy of a tri-phosphor fluorescent lamp (90lmW~(-1)).
机译：我们制造了三种类型的高发光效率白光发光二极管（LED）。第一种是在20 mA的正向偏置电流下具有249 lm W〜（-1）的高发光效率（η_1）和14.4 lm的高光通量（φ_v）的白色LED。该η_1大约是三基色荧光灯（90 lmW〜（-1））的三倍。在该白色LED中用作激发源的蓝色LED具有47.1 mW的高输出功率（φ_e）和84.3％的高外部量子效率（η_（ex））。第二个是由上述大功率蓝色LED制成的大功率白色LED，在350 mA下的Φ_e为756 mW。高功率白光LED的φ_v和η_1在350 mA时分别为203 lm和183 lmW〜（-1）。第三个是由四个高功率蓝色LED管芯制成的高功率白色LED。高功率白光LED在1 A时的φ_v和η_1分别为1913 lm和135 lmW〜（-1）。白色LED的光通量比20 W级荧光灯高，并且是三基色荧光灯（90lmW〜（-1））的发光效率的1.5倍。

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