Enhanced light extraction of light-emitting diodes via nano-honeycomb photonic crystals

Po Han Fu, Guan Jhong Lin, Hsin Ping Wang, Kun Yu Lai, Jr Hau He

研究成果: 雜誌貢獻期刊論文同行評審

23 引文 斯高帕斯(Scopus)


We present an effective light extraction scheme for GaN-based multi-quantum-well (MQW) light emitting diodes with periodic SiO2 nano-honeycomb arrays fabricated by natural lithography and reactive ion etching. The nano-honeycombs significantly boost light output by providing additional light extraction channels, not only guiding the internal modes into air but also alleviating the sever droop effect at high input power. At the driving current of 400mA, light output power through the nano-honeycombs is 77.8% higher than that of the bare device. In addition, the output power is particularly enhanced at the diffraction angle around 65°, which is attributed to the intensive first order diffraction on the honeycombs. Simulations based on finite-difference time-domain method are also carried out to reveal the field distribution across device interfaces.

頁(從 - 到)78-83
期刊Nano Energy
出版狀態已出版 - 9月 2014


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