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Title: Multicolor fluorescent light-emitting diodes based on cesium lead halide perovskite quantum dots

Abstract

High quantum yield, narrow full width at half-maximum and tunable emission color of perovskite quantum dots (QDs) make this kind of material good prospects for light-emitting diodes (LEDs). However, the relatively poor stability under high temperature and air condition limits the device performance. To overcome this issue, the liquid-type packaging structure in combination with blue LED chip was employed to fabricate the fluorescent perovskite quantum dot-based LEDs. A variety of monochromatic LEDs with green, yellow, reddish-orange, and red emission were fabricated by utilizing the inorganic cesium lead halide perovskite quantum dots as the color-conversion layer, which exhibited the narrow full width at half-maximum (<35 nm), the relatively high luminous efficiency (reaching 75.5 lm/W), and the relatively high external quantum efficiency (14.6%), making it the best-performing perovskite LEDs so far. Compared to the solid state LED device, the liquid-type LED devices exhibited excellent color stability against the various working currents. Furthermore, we demonstrated the potential prospects of all-inorganic perovskite QDs for the liquid-type warm white LEDs.

Authors:
 [1];  [2]; ; ; ;  [1];  [3]
  1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012 (China)
  2. (China)
  3. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012 (China)
Publication Date:
OSTI Identifier:
22594359
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 109; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AIR; CESIUM; COLOR; COMPARATIVE EVALUATIONS; FLUORESCENCE; LAYERS; LEAD HALIDES; LIGHT EMITTING DIODES; LIQUIDS; MONOCHROMATIC RADIATION; PACKAGING; PEROVSKITE; QUANTUM DOTS; QUANTUM EFFICIENCY; STABILITY; TEMPERATURE RANGE 0400-1000 K; WIDTH

Citation Formats

Wang, Peng, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, Bai, Xue, E-mail: baix@jlu.edu.cn, E-mail: yuzhang@jlu.edu.cn, Sun, Chun, Zhang, Xiaoyu, Zhang, Yu, E-mail: baix@jlu.edu.cn, E-mail: yuzhang@jlu.edu.cn, and Zhang, Tieqiang. Multicolor fluorescent light-emitting diodes based on cesium lead halide perovskite quantum dots. United States: N. p., 2016. Web. doi:10.1063/1.4960662.
Wang, Peng, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, Bai, Xue, E-mail: baix@jlu.edu.cn, E-mail: yuzhang@jlu.edu.cn, Sun, Chun, Zhang, Xiaoyu, Zhang, Yu, E-mail: baix@jlu.edu.cn, E-mail: yuzhang@jlu.edu.cn, & Zhang, Tieqiang. Multicolor fluorescent light-emitting diodes based on cesium lead halide perovskite quantum dots. United States. doi:10.1063/1.4960662.
Wang, Peng, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, Bai, Xue, E-mail: baix@jlu.edu.cn, E-mail: yuzhang@jlu.edu.cn, Sun, Chun, Zhang, Xiaoyu, Zhang, Yu, E-mail: baix@jlu.edu.cn, E-mail: yuzhang@jlu.edu.cn, and Zhang, Tieqiang. Mon . "Multicolor fluorescent light-emitting diodes based on cesium lead halide perovskite quantum dots". United States. doi:10.1063/1.4960662.
@article{osti_22594359,
title = {Multicolor fluorescent light-emitting diodes based on cesium lead halide perovskite quantum dots},
author = {Wang, Peng and State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012 and Bai, Xue, E-mail: baix@jlu.edu.cn, E-mail: yuzhang@jlu.edu.cn and Sun, Chun and Zhang, Xiaoyu and Zhang, Yu, E-mail: baix@jlu.edu.cn, E-mail: yuzhang@jlu.edu.cn and Zhang, Tieqiang},
abstractNote = {High quantum yield, narrow full width at half-maximum and tunable emission color of perovskite quantum dots (QDs) make this kind of material good prospects for light-emitting diodes (LEDs). However, the relatively poor stability under high temperature and air condition limits the device performance. To overcome this issue, the liquid-type packaging structure in combination with blue LED chip was employed to fabricate the fluorescent perovskite quantum dot-based LEDs. A variety of monochromatic LEDs with green, yellow, reddish-orange, and red emission were fabricated by utilizing the inorganic cesium lead halide perovskite quantum dots as the color-conversion layer, which exhibited the narrow full width at half-maximum (<35 nm), the relatively high luminous efficiency (reaching 75.5 lm/W), and the relatively high external quantum efficiency (14.6%), making it the best-performing perovskite LEDs so far. Compared to the solid state LED device, the liquid-type LED devices exhibited excellent color stability against the various working currents. Furthermore, we demonstrated the potential prospects of all-inorganic perovskite QDs for the liquid-type warm white LEDs.},
doi = {10.1063/1.4960662},
journal = {Applied Physics Letters},
number = 6,
volume = 109,
place = {United States},
year = {Mon Aug 08 00:00:00 EDT 2016},
month = {Mon Aug 08 00:00:00 EDT 2016}
}
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  • We have investigated the effect of reaction temperature of hot-injection method on the structural properties of CsPbX3 (X: Br, I, Cl) perovskite nanocrystals (NCs) using the small- and wide-angle X-ray scattering. It is confirmed that the size of the NCs decreased as the reaction temperature decreased, resulting stronger quantum confinement. The cubic-phase perovskite NCs were formed despite the reaction temperatures increased from 140 to 180 °C. However, monodispersive NC cubes which are required for densely packing self-assembly film were only formed at lower temperatures. From the X-ray scattering measurements, the spin-coated film from more monodispersive perovskite nanocubes synthesized at lowermore » temperatures resulted in more preferred orientation. This dense-packing perovskite film with preferred orientation yielded efficient light-emitting diode (LED) performance. Thus, the dense-packing structure of NC assemblies formed after spin-coating should be considered for high-efficient LEDs based on perovskite quantum dots in addition to quantum confinement effect of the quantum dots.« less
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