TY - JOUR
T1 - Efficient All-Perovskite White Light-Emitting Diodes Made of In Situ Grown Perovskite-Mesoporous Silica Nanocomposites
AU - Fan, Meng
AU - Huang, Jinpeng
AU - Turyanska, Lyudmila
AU - Bian, Zhenfeng
AU - Wang, Liancheng
AU - Xu, Chunyang
AU - Liu, Nan
AU - Li, Hongbo
AU - Zhang, Xiaoyu
AU - Zhang, Chengxi
AU - Yang, Xuyong
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023
Y1 - 2023
N2 - Metal halide perovskite quantum dots (QDs) have emerged as potential materials for high brightness, wide color gamut, and cost-effective backlight emission due to their high photoluminescence quantum yields, narrow emission linewidths, and tunable bandgaps. Herein, CsPbX3/SBA-15 nanocomposites are prepared with outstanding optical properties and high stability through an in situ growth strategy using mesoporous silica particles. According to finite-difference time-domain simulations, the mesoporous structure provides a strong waveguide effect on perovskite QDs and the uniform dispersion suppresses reabsorption losses, improving the overall photoconversion efficiency of perovskite QDs. The as-fabricated perovskite monochromatic light-emitting diode (LED) has a maximum luminous efficiency of 183 lm W−1, which is the highest for monochromatic perovskite LEDs reported to date. A further benefit of this work is that the white devices, which combine the green and red perovskite nanocomposites with commercial blue LED, exhibit a high luminous efficiency of 116 lm W−1 and a wide color gamut (125% for NTSC and 94% for Rec. 2020) with coordinates of (0.33,0.31).
AB - Metal halide perovskite quantum dots (QDs) have emerged as potential materials for high brightness, wide color gamut, and cost-effective backlight emission due to their high photoluminescence quantum yields, narrow emission linewidths, and tunable bandgaps. Herein, CsPbX3/SBA-15 nanocomposites are prepared with outstanding optical properties and high stability through an in situ growth strategy using mesoporous silica particles. According to finite-difference time-domain simulations, the mesoporous structure provides a strong waveguide effect on perovskite QDs and the uniform dispersion suppresses reabsorption losses, improving the overall photoconversion efficiency of perovskite QDs. The as-fabricated perovskite monochromatic light-emitting diode (LED) has a maximum luminous efficiency of 183 lm W−1, which is the highest for monochromatic perovskite LEDs reported to date. A further benefit of this work is that the white devices, which combine the green and red perovskite nanocomposites with commercial blue LED, exhibit a high luminous efficiency of 116 lm W−1 and a wide color gamut (125% for NTSC and 94% for Rec. 2020) with coordinates of (0.33,0.31).
KW - light-emitting diodes
KW - luminous efficacy
KW - perovskite quantum dots
KW - reabsorption
KW - waveguide effects
UR - http://www.scopus.com/inward/record.url?scp=85148062644&partnerID=8YFLogxK
U2 - 10.1002/adfm.202215032
DO - 10.1002/adfm.202215032
M3 - Article
AN - SCOPUS:85148062644
SN - 1616-301X
JO - Advanced Functional Materials
JF - Advanced Functional Materials
ER -