Jump to main content
Jump to site search

Issue 40, 2017
Previous Article Next Article

Highly stable CsPbBr3 quantum dots coated with alkyl phosphate for white light-emitting diodes

Author affiliations

Abstract

Inorganic halide perovskite quantum dots (QDs) suffer from problems related to poor water stability and poor thermal stability. Here we developed a simple strategy to synthesize alkyl phosphate (TDPA) coated CsPbBr3 QDs by using 1-tetradecylphosphonic acid both as the ligand for the CsPbBr3 QDs and as the precursor for the formation of alkyl phosphate. These QDs not only retain a high photoluminescence quantum yield (PLQY, 68%) and narrow band emission (FHWM ∼ 22 nm) but also exhibit high stability against water and heat. The relative PL intensity of the QDs was maintained at 75% or 59% after being dispersed in water for 5 h or heated to 375 K (100 °C), respectively. Finally, white light-emitting diodes (WLEDs) with a high luminous efficiency of 63 lm W−1 and a wide color gamut (122% of NTSC) were fabricated by using green-emitting CsPbBr3/TDPA QDs and red-emitting K2SiF6:Mn4+ phosphors as color converters. The luminous efficiency of the WLEDs remained at 90% after working under a relative humidity (RH) of 60% for 15 h, thereby showing promise for use as backlight devices in LCDs.

Graphical abstract: Highly stable CsPbBr3 quantum dots coated with alkyl phosphate for white light-emitting diodes

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Jun 2017, accepted on 11 Sep 2017 and first published on 14 Sep 2017


Article type: Communication
DOI: 10.1039/C7NR04179A
Citation: Nanoscale, 2017,9, 15286-15290
  •   Request permissions

    Highly stable CsPbBr3 quantum dots coated with alkyl phosphate for white light-emitting diodes

    T. Xuan, X. Yang, S. Lou, J. Huang, Y. Liu, J. Yu, H. Li, K. Wong, C. Wang and J. Wang, Nanoscale, 2017, 9, 15286
    DOI: 10.1039/C7NR04179A

Search articles by author

Spotlight

Advertisements