Impact of Alternating-Current Operation on All-Inorganic Quantum Dot Light-Emitting Diodes

被引：0

作者：

Lee, Hak June ^{[1
]}

Park, Jin Su ^{[1
]}

Rhee, Seunghyun ^{[2
]}

Park, Jeong Woo ^{[1
]}

Seok, Hae Jun ^{[3
]}

Jung, Dongju ^{[1
]}

Lim, Jaemin ^{[1
]}

Shin, Doyoon ^{[1
]}

Im, Seongbin ^{[1
]}

Min, Se Jong ^{[1
]}

Park, Young-Shin ^{[4
]}

Kim, Han Ki ^{[3
,5
]}

Bae, Wan Ki ^{[1
,5
]}

Hahm, Donghyo ^{[1
,4
]}

机构：

[1] Sungkyunkwan Univ SKKU, SKKU Adv Inst Nano Technol SAINT, Suwon 16419, South Korea

[2] Korea Res Inst Chem Technol KRICT, Div Adv Mat, Daejeon 34113, South Korea

[3] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea

[4] Los Alamos Natl Lab, Chem Div, Los Alamos, NM 87545 USA

[5] Sungkyunkwan Univ SKKU, Dept Display Engn, Suwon 16419, South Korea

来源：

ACS APPLIED MATERIALS & INTERFACES | 2024年 / 16卷 / 30期

基金：

新加坡国家研究基金会;

关键词：

quantum dot-based light-emitting diodes; alternating-currentoperation; inorganic hole transport layer; all-inorganiclight-emitting diodes; optoelectronics; HIGHLY EFFICIENT; SEMICONDUCTOR NANOCRYSTALS; ELECTROLUMINESCENCE; PERFORMANCE;

D O I：

10.1021/acsami.4c09447

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In colloidal quantum dot light-emitting diodes (QD-LEDs), replacing organic hole transport layers (HTLs) with their inorganic counterparts is expected to yield distinct advantages due to their inherent material robustness. However, despite the promising characteristics of all-inorganic QD-LEDs, some challenges persist in achieving stable operation; for example, the electron overflow toward the inorganic HTL and charge accumulation within working devices return a temporal inconsistency in device characteristics. To address these challenges, we propose an operational approach that employs an alternating-current (AC) in all-inorganic QD-LEDs. We carry out comprehensive studies on the optoelectrical characteristics of all-inorganic QD-LEDs under direct-current (DC) or AC operation and demonstrate that AC operation can facilitate efficient charge carrier recombination within the QD emissive layer, leading to improved device efficiency and temporally invariant optoelectronic characteristics. Leveraging the intrinsic material robustness of inorganic charge transport layers (CTLs), our current study suggests a promising pathway toward enhancing the performance and stability of QD-LEDs, particularly for futuristic display applications.

引用

页码：39683 / 39692

页数：10