Surface Coating of Lead-free Perovskites to Break the Luminescence Threshold for Fluorescent Information Recognition

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

3 Scopus Citations
View graph of relations

Author(s)

  • Hongbo Zhao
  • Ru Chen
  • Xiaoyan Li
  • Hai Lin

Detail(s)

Original languageEnglish
Pages (from-to)10534–10544
Journal / PublicationACS Sustainable Chemistry and Engineering
Volume11
Issue number28
Online published5 Jul 2023
Publication statusPublished - 17 Jul 2023

Abstract

Lead-free perovskites are becoming a promising candidate in the new generation of fluorescence information recognition owing to their superior optoelectronic properties and stable chemical properties. However, the vast majority of perovskite phosphors present a luminescence threshold (LT) due to concentration quenching and exhibit a single luminescent peak as the monochrome source, leading to limited application prospects. Herein, surface coating of Bi3+-doped all-inorganic lead-free Cs2ZrCl6 perovskite microcrystal is designed to break LT and present dual-mode luminescence under 259 and 358 nm excitation. Dual-mode fluorescence peaks are located at 435 and 453 nm, contrary to self-trapped exciton (STE) emissions reported previously, which originate from STE emission and inter-configurational 3P0,11S0 transitions of Bi3+, respectively. Moreover, surface coating of ethyl orthosilicate (CHSiO) is introduced to form a core-shell structure, enhancing the particle dispersion and the luminescence stability of Cs2ZrCl6:Bi3+ phosphors, which breaks the LT to increase luminescence intensity. Finally, the Cs2ZrCl6:Bi3+-coated CHSiO is mixed with polydimethylsiloxane and printed QR code by screen printing technology to achieve dual-mode luminescence and display. These findings reveal the unique advantages of surface-coated Bi3+-doped Cs2ZrCl6 perovskites, thus opening a new pathway for multi-mode fluorescence recognition and remote excitation applications. © 2023 American Chemical Society.

Research Area(s)

  • dual-mode fluorescence, information recognition, lead-free perovskites, luminescence threshold, surface coating

Citation Format(s)

Surface Coating of Lead-free Perovskites to Break the Luminescence Threshold for Fluorescent Information Recognition. / Zhao, Hongbo; Chen, Ru; Li, Xiaoyan et al.
In: ACS Sustainable Chemistry and Engineering, Vol. 11, No. 28, 17.07.2023, p. 10534–10544.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review