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

권오훈

Kwon, Oh Hoon
Ultrafast Laser Spectroscopy and Nano-microscopy Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Manipulated Interface for Enhanced Energy Cascade in Quasi-2D Blue Perovskite Light-Emitting Diodes

Author(s)
Shin, Yun SeopPark, Chan BeomAdhikari, AniruddhaYoon, Yung JinCho, Hye WonSon, Jung GeonSeo, JongdeukSong, TaeheeLee, WoojinYeop, JiwooKim, Jae WonGong, MinsikWalker, BrightKwon, Oh HoonKim, Gi-HwanKim, Jin Young
Issued Date
2022-10
DOI
10.1021/acsenergylett.2c01785
URI
https://scholarworks.unist.ac.kr/handle/201301/59874
Citation
ACS ENERGY LETTERS, v.7, no.10, pp.3345 - 3352
Abstract
Quasi-two-dimensional (2D) perovskites have recently emerged as emitters in blue perovskite light-emitting diodes (PeLEDs). The cascading energy-transfer process between different 2D phases plays an essential role in the high performance of this class of PeLEDs. Herein, we propose an interfacial engineering strategy by incorporating a zwitterionic additive, l-phenylalanine, into the hole-injection layer (HIL), enabling suppression of trap-assisted deactivation channels by virtue of the coordination interactions between the additive and Pb2+ defects in the perovskite phase. In addition, the introduction of l-phenylalanine reduces the release of metallic indium species from indium tin oxide substrates initiated by acidic HILs, resulting in the suppression of luminescence quenching in the perovskite layer. The synergetic benefits create an ideal energy landscape, blocking energy losses and boosting PeLED performance with a peak external quantum efficiency of 10.98% at 480 nm and extended device lifetimes. Our approach provides a versatile strategy to achieve high-performance blue PeLEDs.
Publisher
American Chemical Society
ISSN
2380-8195
Keyword
EFFICIENTPOLYMERPASSIVATIONPERFORMANCESTABILITYNANOCRYSTALSLEAD(II)OXIDE

qrcode

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