Enhanced Color-Conversion Efficiency of Hybrid Nanostructured-Cavities InGaN/GaN Light-Emitting Diodes Consisting of Nontoxic InP Quantum Dots

Che Yu Liu, Tzu Pei Chen, Jhih Kai Huang, Tzu Neng Lin, Chia Yen Huang, Xiu Ling Li, Hao Chung Kuo, Ji Lin Shen, Chun Yen Chang

Research output: Contribution to journalArticle

Abstract

Color-conversion efficiency enhancement of hybrid light-emitting diodes (LEDs) by cadmium-free colloidal quantum dots (QDs) and a novel selective area nanocavities structure has been demonstrated. Combining nanoimprinting and photolithography techniques, nanocavities array can be fabricated at designated locations on the LEDs. The color-conversion efficiency of selective area nanocavities LED can be enhanced by up to 13%. The significant color-conversion efficiency enhancement is attributed to resonance of InP QDs emission in nanocavities and nonradiative energy transfer from LED active layers to InP QDs, which has been investigated and characterized by finite domain time-domain simulation, electroluminescence, and time-resolved photoluminescence measurements. This hybrid nanostructured device, therefore, exhibits a great potential for the applications of multicolor lighting sources and micro-LED.

Original languageEnglish (US)
Article number8027032
JournalIEEE Journal of Selected Topics in Quantum Electronics
Volume23
Issue number5
DOIs
StatePublished - Sep 1 2017

Keywords

  • Light emitting diodes
  • colloidal quantum dots
  • energy transfer
  • nanotechnology
  • optoelectronic devices

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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