High-Brightness Blue and White LEDs based on Inorganic Perovskite Nanocrystals and their Composites
Abstract
Inorganic metal halide perovskite nanocrystals (NCs) have been employed universally in light-emitting applications during the past two years. Here, blue-emission (≈ 470 nm) Cs-based perovskite NCs are derived by directly mixing synthesized bromide and chloride nanocrystals with a weight ratio of 2:1. High-brightness blue perovskite light-emitting diodes (PeLEDs) are obtained by controlling the grain size of the perovskite films. Moreover, a white PeLED is demonstrated for the first time by blending orange polymer materials with the blue perovskite nanocrystals as the active layer. Exciton transfer from the blue nanocrystals to the orange polymers via Forster or Dexter energy transfer is analyzed through time resolved photoluminescence. In conclusion, by tuning the ratio between the perovskite nanocrystals and polymers, pure white light is achieved with the a CIE coordinate at (0.33,0.34).
- Authors:
-
- Univ. of California, Los Angeles, CA (United States); National Cheng Kung Univ., Tainan (Taiwan)
- Univ. of California, Los Angeles, CA (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- US Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); USDOE
- OSTI Identifier:
- 1364159
- Report Number(s):
- NREL/JA-5900-68405
Journal ID: ISSN 0935-9648
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Materials
- Additional Journal Information:
- Journal Volume: 29; Journal Issue: 23; Journal ID: ISSN 0935-9648
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE; light-emitting diodes; nanocrystals; perovskites; white light
Citation Formats
Yao, En -Ping, Yang, Zhanlue, Meng, Lei, Sun, Pengyu, Dong, Shiqi, Yang, Ye, and Yang, Yang. High-Brightness Blue and White LEDs based on Inorganic Perovskite Nanocrystals and their Composites. United States: N. p., 2017.
Web. doi:10.1002/adma.201606859.
Yao, En -Ping, Yang, Zhanlue, Meng, Lei, Sun, Pengyu, Dong, Shiqi, Yang, Ye, & Yang, Yang. High-Brightness Blue and White LEDs based on Inorganic Perovskite Nanocrystals and their Composites. United States. https://doi.org/10.1002/adma.201606859
Yao, En -Ping, Yang, Zhanlue, Meng, Lei, Sun, Pengyu, Dong, Shiqi, Yang, Ye, and Yang, Yang. Mon .
"High-Brightness Blue and White LEDs based on Inorganic Perovskite Nanocrystals and their Composites". United States. https://doi.org/10.1002/adma.201606859. https://www.osti.gov/servlets/purl/1364159.
@article{osti_1364159,
title = {High-Brightness Blue and White LEDs based on Inorganic Perovskite Nanocrystals and their Composites},
author = {Yao, En -Ping and Yang, Zhanlue and Meng, Lei and Sun, Pengyu and Dong, Shiqi and Yang, Ye and Yang, Yang},
abstractNote = {Inorganic metal halide perovskite nanocrystals (NCs) have been employed universally in light-emitting applications during the past two years. Here, blue-emission (≈ 470 nm) Cs-based perovskite NCs are derived by directly mixing synthesized bromide and chloride nanocrystals with a weight ratio of 2:1. High-brightness blue perovskite light-emitting diodes (PeLEDs) are obtained by controlling the grain size of the perovskite films. Moreover, a white PeLED is demonstrated for the first time by blending orange polymer materials with the blue perovskite nanocrystals as the active layer. Exciton transfer from the blue nanocrystals to the orange polymers via Forster or Dexter energy transfer is analyzed through time resolved photoluminescence. In conclusion, by tuning the ratio between the perovskite nanocrystals and polymers, pure white light is achieved with the a CIE coordinate at (0.33,0.34).},
doi = {10.1002/adma.201606859},
journal = {Advanced Materials},
number = 23,
volume = 29,
place = {United States},
year = {Mon Apr 10 00:00:00 EDT 2017},
month = {Mon Apr 10 00:00:00 EDT 2017}
}
Web of Science
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