Efficient tandem organic light-emitting diodes with non-doped structures

Yue Qin; Chen Yang Liu; Rui Qing Li; Jiong Wang; Ya Nan Lu; Yue Hua Chen; Yu Zhu Wang; Ya Nan Xu; Xin Wen Zhang; Wei Huang

doi:10.1364/OL.409613

Efficient tandem organic light-emitting diodes with non-doped structures

Yue Qin, Chen Yang Liu, Rui Qing Li, Jiong Wang, Ya Nan Lu, Yue Hua Chen, Yu Zhu Wang, Ya Nan Xu, Xin Wen Zhang, Wei Huang

Institute of Flexible Electronics

Nanjing University of Posts and Telecommunications

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Highly efficient tandem organic light-emitting diodes (TOLEDs) were achieved based on a non-doped charge generation unit (CGU) consisting of LiF/Al/C60/4,4’,4”tris(N-3-methylphenyl-N-phenyl-amino) triphenylamine (m-MTDATA) and ultrathin emitting layers. The current–voltage characteristics of the CGU devices and electron-only devices and the capacitance–voltage characteristics of the CGU-based capacitance devices were characterized to explore the charge generation and injection mechanisms. The charge generation process occurs at the interface of C60/m–MTDATA through electron transferring from the highest occupied molecular orbital of m-MTDATA to the lowest unoccupied molecular orbital of C60. It is found that the thinner C60 layer contributes to efficient electron injection. Under the optimal structure, the blue TOLEDs exhibit a maximum current efficiency (CE_max) of 43.3 cd/A. The CE_max and maximum external quantum efficiency (EQE_max) of the white TOLEDs reach 84.6 cd/A and 26.7%, respectively.

Original language	English
Pages (from-to)	6450-6453
Number of pages	4
Journal	Chinese Optics Letters
Volume	45
Issue number	23
DOIs	https://doi.org/10.1364/OL.409613
State	Published - 1 Dec 2020

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@article{1a54347517764a539ede9aa6d21acc36,

title = "Efficient tandem organic light-emitting diodes with non-doped structures",

abstract = "Highly efficient tandem organic light-emitting diodes (TOLEDs) were achieved based on a non-doped charge generation unit (CGU) consisting of LiF/Al/C60/4,4{\textquoteright},4”tris(N-3-methylphenyl-N-phenyl-amino) triphenylamine (m-MTDATA) and ultrathin emitting layers. The current–voltage characteristics of the CGU devices and electron-only devices and the capacitance–voltage characteristics of the CGU-based capacitance devices were characterized to explore the charge generation and injection mechanisms. The charge generation process occurs at the interface of C60/m–MTDATA through electron transferring from the highest occupied molecular orbital of m-MTDATA to the lowest unoccupied molecular orbital of C60. It is found that the thinner C60 layer contributes to efficient electron injection. Under the optimal structure, the blue TOLEDs exhibit a maximum current efficiency (CEmax) of 43.3 cd/A. The CEmax and maximum external quantum efficiency (EQEmax) of the white TOLEDs reach 84.6 cd/A and 26.7%, respectively.",

author = "Yue Qin and Liu, {Chen Yang} and Li, {Rui Qing} and Jiong Wang and Lu, {Ya Nan} and Chen, {Yue Hua} and Wang, {Yu Zhu} and Xu, {Ya Nan} and Zhang, {Xin Wen} and Wei Huang",

note = "Publisher Copyright: {\textcopyright} 2020 Optical Society of America",

year = "2020",

month = dec,

day = "1",

doi = "10.1364/OL.409613",

language = "英语",

volume = "45",

pages = "6450--6453",

journal = "Chinese Optics Letters",

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TY - JOUR

T1 - Efficient tandem organic light-emitting diodes with non-doped structures

AU - Qin, Yue

AU - Liu, Chen Yang

AU - Li, Rui Qing

AU - Wang, Jiong

AU - Lu, Ya Nan

AU - Chen, Yue Hua

AU - Wang, Yu Zhu

AU - Xu, Ya Nan

AU - Zhang, Xin Wen

AU - Huang, Wei

PY - 2020/12/1

Y1 - 2020/12/1

N2 - Highly efficient tandem organic light-emitting diodes (TOLEDs) were achieved based on a non-doped charge generation unit (CGU) consisting of LiF/Al/C60/4,4’,4”tris(N-3-methylphenyl-N-phenyl-amino) triphenylamine (m-MTDATA) and ultrathin emitting layers. The current–voltage characteristics of the CGU devices and electron-only devices and the capacitance–voltage characteristics of the CGU-based capacitance devices were characterized to explore the charge generation and injection mechanisms. The charge generation process occurs at the interface of C60/m–MTDATA through electron transferring from the highest occupied molecular orbital of m-MTDATA to the lowest unoccupied molecular orbital of C60. It is found that the thinner C60 layer contributes to efficient electron injection. Under the optimal structure, the blue TOLEDs exhibit a maximum current efficiency (CEmax) of 43.3 cd/A. The CEmax and maximum external quantum efficiency (EQEmax) of the white TOLEDs reach 84.6 cd/A and 26.7%, respectively.

AB - Highly efficient tandem organic light-emitting diodes (TOLEDs) were achieved based on a non-doped charge generation unit (CGU) consisting of LiF/Al/C60/4,4’,4”tris(N-3-methylphenyl-N-phenyl-amino) triphenylamine (m-MTDATA) and ultrathin emitting layers. The current–voltage characteristics of the CGU devices and electron-only devices and the capacitance–voltage characteristics of the CGU-based capacitance devices were characterized to explore the charge generation and injection mechanisms. The charge generation process occurs at the interface of C60/m–MTDATA through electron transferring from the highest occupied molecular orbital of m-MTDATA to the lowest unoccupied molecular orbital of C60. It is found that the thinner C60 layer contributes to efficient electron injection. Under the optimal structure, the blue TOLEDs exhibit a maximum current efficiency (CEmax) of 43.3 cd/A. The CEmax and maximum external quantum efficiency (EQEmax) of the white TOLEDs reach 84.6 cd/A and 26.7%, respectively.

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U2 - 10.1364/OL.409613

DO - 10.1364/OL.409613

M3 - 文章

C2 - 33258834

AN - SCOPUS:85097012677

SN - 1671-7694

VL - 45

SP - 6450

EP - 6453

JO - Chinese Optics Letters

JF - Chinese Optics Letters

IS - 23

ER -

Efficient tandem organic light-emitting diodes with non-doped structures

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