Browsing by Author "Chen, Tzi-Pei"

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Enhanced Light Extraction Efficiency of GaN-Based Hybrid Nanorods Light-Emitting Diodes
(2015-07-01)
Huang, Jhih-Kai
;
Liu, Che-Yu
;
Chen, Tzi-Pei
;
Huang, Hung-Wen
;
Lai, Fang-I
High light extraction GaN-based light-emitting diodes (LEDs) with a hybrid structure of straight nanorods located in an array of microholes have been successfully demonstrated. Via the nanoimprint lithography and photolithography techniques, high aspect-ratio light-guiding InGaN/GaN nanorods can be fabricated and regularly arranged in microholes, resulting in a great improvement of the light extraction for the GaN-based LED device. The light output power of the hybrid nanorods LED is 22.04 mW at the driving current standard of 25.4 A/cm(2), an enhancement of 38.7% to the conventional GaN-based LEDs. Furthermore, with a modification of the hybrid structures\' dimensions and locations, the emitted optical energy can be redistributed to obtain light-emitting devices with homogenueous optical field distributions.