Ag@SiO2-embedded InGaN/GaN nanorod array white light-emitting diode with perovskite nanocrystal films

Do Yeong Shin, Taehwan Kim, Ozgun Akyuz, Hilmi Volkan Demir, In Hwan Lee

Research output: Contribution to journalArticlepeer-review

Abstract

White light-emitting diodes (LEDs) are great candidates for general lighting. Phosphors have commonly been used for the color conversion layers of white LEDs; however, they backscatter more than half of the down-converted light, which is lost within the device, thus degrading the overall performance. In this study, we propose and demonstrate white LEDs with improved efficiency enabled by the intimate integration of Ag@SiO2-supported blue InGaN/GaN nanorod LEDs together with green- and red-emitting perovskite nanocrystal (PNC) films as color conversion layers. The photoluminescence (PL) intensity of the blue LEDs (BLEDs) was significantly enhanced owing to the localized surface plasmon (LSP) effect of Ag@SiO2 nanoparticles. In addition, the perovskite PL intensity was improved by the high-power BLED backlight. The resulting PL intensity of the Ag@SiO2 nanoparticle-embedded nanorod white LED was 62% greater than that of a planar white LED.

Original languageEnglish
Article number162974
JournalJournal of Alloys and Compounds
Volume898
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Localized surface plasmon
  • Nanorod light-emitting diodes
  • Perovskite nanocrystals
  • White light-emitting diodes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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