In situ preparation of Mn-doped perovskite nanocrystalline films and application to white light emitting devices

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

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Author(s)

  • Xianwei Bai
  • Lingqiang Meng
  • Ni Zhou
  • Jinju Zheng
  • Xue-Feng Yu
  • Jun-Jun Xiao
  • Bingsuo Zou
  • Jia Li

Detail(s)

Original languageEnglish
Pages (from-to)1163-1169
Journal / PublicationJournal of Colloid and Interface Science
Volume606
Issue numberpt. 2
Online published14 Aug 2021
Publication statusOnline published - 14 Aug 2021

Abstract

Mn-doped perovskite nanocrystals have promised new optoelectronic applications due to their unique material properties. In the present study, Mn-doped perovskite nanocrystalline films were prepared in situ in a polymer matrix. The Mn-doped perovskite nanocrystals (PNCs) had good crystallinity and uniform size/spatial distributions in the polymer film. Bright dual-color emission and the long lifetime of the excited state of the dopant were observed from the host exciton and the Mn2+ dopant, respectively. Furthermore, magnetism was observed in the optimal Mn2+ concentration, implying that magnetic coupling was achieved in the Mn-doped perovskite lattice. The Mn-doped perovskite films also showed superior stability against moisture. To demonstrate the practicality of this composite film, a white light emitting device was fabricated by combining a single composite film with a blue light emitting diode; the device showed a high-quality white light emission, and the Commission Internationale De L'Eclairage (CIE) chromaticity coordinate of the white light emitting diode (WLED) (0.361, 0.326) was close to the optimal white color index. In this single-layer WLED, self-absorption among the luminous multilayers in traditional white light emitting diodes can be avoided. The study findings revealed that Mn-doped perovskite nanocrystalline films have many exciting properties, which bodes well for the fundamental study and design of high-performance optoelectronic devices.

Research Area(s)

  • Dual emission, Magnetic, Mn doping, Perovskite, White LED

Citation Format(s)

In situ preparation of Mn-doped perovskite nanocrystalline films and application to white light emitting devices. / Bai, Xianwei; Meng, Lingqiang; Zhou, Ni; Zheng, Jinju; Yu, Xue-Feng; Chu, Paul K.; Xiao, Jun-Jun; Zou, Bingsuo; Li, Jia.

In: Journal of Colloid and Interface Science, Vol. 606, No. pt. 2, 15.01.2022, p. 1163-1169.

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