Single Source Precursor Chemical Vapor Decomposition Method to Fabricate Stable, Bright Emissive Aluminum Hydroxide Phosphors for UV-Pumped White Light-Emitting Devices

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

7 Scopus Citations
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Author(s)

  • Bingkun Chen
  • Xingjian Xu
  • Shuangyang Zou
  • Yongtian Wang
  • Bingsuo Zou
  • Haizheng Zhong

Detail(s)

Original languageEnglish
Article number1701115
Journal / PublicationAdvanced Optical Materials
Volume6
Issue number3
Online published27 Dec 2017
Publication statusPublished - 5 Feb 2018

Abstract

Aluminum hydroxides are considered to be a potential abundant, low-cost blue emissive material to construct UV-pumped white light-emitting diodes (WLEDs). In this work, a single-source precursor chemical vapor decomposition method is adapted to fabricate stable, strongly emissive aluminum hydroxide phosphors with photoluminescence quantum yield of up to 69% in solid state by thermal decomposing aluminum diacetate hydroxide (Al(OH)(Ac)2) at temperatures (260–360 °C) in N2 atmosphere. It exhibits layered, amorphous structure and its emission of aluminum hydroxide is enhanced by electron-donating surface hydroxyl groups and originates from F+ centers and carbon-related defects contributing to UV (388 nm) and blue (450–520 nm) spectral regions, respectively. Employing the as-fabricated aluminum hydroxides as blue phosphor and CuInS2 nanocrystals as red phosphor, high color rendering and high-efficiency WLEDs with luminous efficiencies up to 37 lm W−1 and high color rendering index of 91 are fabricated. This is the best performance reported so far for aluminum hydroxide based LEDs.

Research Area(s)

  • aluminum hydroxide, blue emission, rare-earth free phosphors, UV-pumped LEDs

Citation Format(s)

Single Source Precursor Chemical Vapor Decomposition Method to Fabricate Stable, Bright Emissive Aluminum Hydroxide Phosphors for UV-Pumped White Light-Emitting Devices. / Chen, Bingkun; Xu, Xingjian; Zou, Shuangyang; Wang, Yongtian; Zou, Bingsuo; Zhong, Haizheng; Rogach, Andrey L.

In: Advanced Optical Materials, Vol. 6, No. 3, 1701115, 05.02.2018.

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