File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

김주영

Kim, Ju-Young
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Growth of Nanosized Single Crystals for Efficient Perovskite Light-Emitting Diodes

Author(s)
Lee, SeungjinPark, Jong HyunNam, Yun SeokLee, Bo RamZhao, BaodanDi Nuzzo, DanieleJung, Eui DaeJeon, HanseolKim, Ju-YoungJeong, Hu YoungFriend, RichardSong, Myoung Hoon
Issued Date
2018-04
DOI
10.1021/acsnano.7b09148
URI
https://scholarworks.unist.ac.kr/handle/201301/23968
Fulltext
https://pubs.acs.org/doi/abs/10.1021/acsnano.7b09148
Citation
ACS NANO, v.12, no.4, pp.3417 - 3423
Abstract
Organic inorganic hybrid perovskites are emerging as promising emitting materials due to their narrow full-width at half maximum emissions, color tunability, and high photoluminescence quantum yields (PLQYs). However, the thermal generation of free charges at room temperature results in a low radiative recombination rate and an excitation-intensity-dependent PLQY, which is associated with the trap density. Here, we report perovskite films composed of uniform nanosized single crystals (average diameter = 31.7 nm) produced by introducing bulky amine ligands and performing the growth at a lower temperature. By effectively controlling the crystal growth, we maximized the radiative bimolecular recombination yield by reducing the trap density and spatially confining the charges. Finally, highly bright and efficient green emissive perovskite light emitting diodes that do not suffer from electroluminescence blinking were achieved with a luminance of up to 55 400 cd m(-2), current efficiency of 55.2 cd A(-1), and external quantum efficiency of 12.1%.
Publisher
AMER CHEMICAL SOC
ISSN
1936-0851
Keyword (Author)
perovskite light-emitting diodenanosized single crystalamine liganddefect siteelectroluminescence blinking
Keyword
LEAD HALIDE PEROVSKITESSOLAR-CELLSNANOCRYSTALLINE PEROVSKITEOPTICAL-PROPERTIESPHOTOLUMINESCENCEPERFORMANCEIODIDEPASSIVATIONHYSTERESISBLINKING

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.