GaN-based photon-recycling green light-emitting diodes with vertical-conduction structure

Jinn Kong Sheu, Fu Bang Chen, Wei Yu Yen, Yen Chin Wang, Chun Nan Liu, Yu Hsiang Yeh, Ming Lun Lee

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A p-i-n structure with near-UV(n-UV) emitting InGaN/GaN multiple quantum well(MQW) structure stacked on a green unipolar InGaN/GaN MQW was epitaxially grown at the same sapphire substrate. Photon recycling green light-emitting diodes(LEDs) with verticalconduction feature on silicon substrates were then fabricated by wafer bonding and laser lift-off techniques. The green InGaN/GaN QWs were pumped with n-UV light to reemit low-energy photons when the LEDs were electrically driven with a forward current. Efficiency droop is potentially insignificant compared with the direct green LEDs due to the increase of effective volume of active layer in the optically pumped green LEDs, i.e., light emitting no longer limited in the QWs nearest to the p-type region to cause severe Auger recombination and carrier overflow losses.

Original languageEnglish
Pages (from-to)A371-A381
JournalOptics Express
Issue number7
Publication statusPublished - 2015 Apr 6

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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