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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs

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Highly Stable Bulk Perovskite for Blue LEDs with Anion-Exchange Method

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Title
Highly Stable Bulk Perovskite for Blue LEDs with Anion-Exchange Method
Author
Yoon, Yung JinShin, Yun SeopJang, HyungsuSon, Jung GeonKim, Jae WonPark, Chan BeomYuk, DohunSeo, JongdeukKim, Gi-HwanKim, Jin Young
Issue Date
2021-04
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.21, no.8, pp.3473 - 3479
Abstract
To date, the light emitting diode (LED) based halide perovskite was rapidly developed due to the outstanding property of perovskite materials. However, the blue perovskite LEDs based on the bulk halide perovskites have been rarely researched and showed low efficiencies. The bulk blue perovskite LEDs suffered from insufficient coverage on the substrate due to the low solubility of the inorganic Cl sources or damaged by the structural instability with participation of organic cations. Here, we show the new method of fabricating stable inorganic bulk blue perovskite LEDs with the anion exchange approach to avoid use of insoluble Cl precursors. The devices showed nice operational spectral stability at the desired blue emission peak. The bulk perovskite blue LEDs showed a maximum luminance of 1468 and 494 cd m(-2) for the 490 and 470 nm emission peaks, respectively.
URI
https://scholarworks.unist.ac.kr/handle/201301/53061
URL
https://pubs.acs.org/doi/10.1021/acs.nanolett.1c00124
DOI
10.1021/acs.nanolett.1c00124
ISSN
1530-6984
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