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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

20 Scopus Citations
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Author(s)

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

Detail(s)

Original languageEnglish
Pages (from-to)78-83
Journal / PublicationNano Energy
Volume8
Online published9 Jun 2014
Publication statusPublished - Sep 2014
Externally publishedYes

Abstract

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.

Research Area(s)

  • Light emitting diodes, Light extraction, Multiple quantum wells, Nanosphere lithography, Photonic crystals

Citation Format(s)

Enhanced light extraction of light-emitting diodes via nano-honeycomb photonic crystals. / Fu, Po-Han; Lin, Guan-Jhong; Wang, Hsin-Ping; Lai, Kun-Yu; He, Jr-Hau.

In: Nano Energy, Vol. 8, 09.2014, p. 78-83.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review