Improved Efficiency Roll-Off and Operational Lifetime of Organic Light-Emitting Diodes with a Tetradentate Platinum(II) Complex by Using an n-Doped Electron-Transporting Layer
The efficiency roll-off and operational lifetime of organic light-emitting diodes (OLEDs) with a tetradentate Pt(II) emitter is improved by engaging an n-doped electron-transporting layer (ETL). Compared to those devices with non-doped ETL, the driving voltage is lowered, the charged carrier is bala...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2021-03-01
|
Series: | Molecules |
Subjects: | |
Online Access: | https://www.mdpi.com/1420-3049/26/7/1835 |
id |
doaj-b526f1e15543446dafe08537dc679c57 |
---|---|
record_format |
Article |
spelling |
doaj-b526f1e15543446dafe08537dc679c572021-03-25T00:07:18ZengMDPI AGMolecules1420-30492021-03-01261835183510.3390/molecules26071835Improved Efficiency Roll-Off and Operational Lifetime of Organic Light-Emitting Diodes with a Tetradentate Platinum(II) Complex by Using an n-Doped Electron-Transporting LayerWeiqiang Liu0Liang Zhou1Long Yi Jin2Gang Cheng3Department of Chemistry, College of Science, Yanbian University, Yanji 133002, ChinaState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, ChinaDepartment of Chemistry, College of Science, Yanbian University, Yanji 133002, ChinaState Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, ChinaThe efficiency roll-off and operational lifetime of organic light-emitting diodes (OLEDs) with a tetradentate Pt(II) emitter is improved by engaging an n-doped electron-transporting layer (ETL). Compared to those devices with non-doped ETL, the driving voltage is lowered, the charged carrier is balanced, and the exciton density in the emissive layer (EML) is decreased in the device with n-doped ETL with 8-hydroxyquinolinolatolithium (Liq). High luminance of almost 70,000 cd m<sup>−2</sup> and high current efficiency of 40.5 cd A<sup>−1</sup> at high luminance of 10,000 cd m<sup>−2</sup> is achieved in the device with 50 wt%-Liq-doped ETL. More importantly, the extended operational lifetime of 1945 h is recorded at the initial luminance of 1000 cd m<sup>−2</sup> in the 50 wt%-Liq-doped device, which is longer than that of the device with non-doped ETL by almost 10 times. This result manifests the potential application of tetradentate Pt(II) complexes in the OLED industry.https://www.mdpi.com/1420-3049/26/7/1835tetradentate Pt(II) complexesorganic light-emitting diodesoperational lifetime |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Weiqiang Liu Liang Zhou Long Yi Jin Gang Cheng |
spellingShingle |
Weiqiang Liu Liang Zhou Long Yi Jin Gang Cheng Improved Efficiency Roll-Off and Operational Lifetime of Organic Light-Emitting Diodes with a Tetradentate Platinum(II) Complex by Using an n-Doped Electron-Transporting Layer Molecules tetradentate Pt(II) complexes organic light-emitting diodes operational lifetime |
author_facet |
Weiqiang Liu Liang Zhou Long Yi Jin Gang Cheng |
author_sort |
Weiqiang Liu |
title |
Improved Efficiency Roll-Off and Operational Lifetime of Organic Light-Emitting Diodes with a Tetradentate Platinum(II) Complex by Using an n-Doped Electron-Transporting Layer |
title_short |
Improved Efficiency Roll-Off and Operational Lifetime of Organic Light-Emitting Diodes with a Tetradentate Platinum(II) Complex by Using an n-Doped Electron-Transporting Layer |
title_full |
Improved Efficiency Roll-Off and Operational Lifetime of Organic Light-Emitting Diodes with a Tetradentate Platinum(II) Complex by Using an n-Doped Electron-Transporting Layer |
title_fullStr |
Improved Efficiency Roll-Off and Operational Lifetime of Organic Light-Emitting Diodes with a Tetradentate Platinum(II) Complex by Using an n-Doped Electron-Transporting Layer |
title_full_unstemmed |
Improved Efficiency Roll-Off and Operational Lifetime of Organic Light-Emitting Diodes with a Tetradentate Platinum(II) Complex by Using an n-Doped Electron-Transporting Layer |
title_sort |
improved efficiency roll-off and operational lifetime of organic light-emitting diodes with a tetradentate platinum(ii) complex by using an n-doped electron-transporting layer |
publisher |
MDPI AG |
series |
Molecules |
issn |
1420-3049 |
publishDate |
2021-03-01 |
description |
The efficiency roll-off and operational lifetime of organic light-emitting diodes (OLEDs) with a tetradentate Pt(II) emitter is improved by engaging an n-doped electron-transporting layer (ETL). Compared to those devices with non-doped ETL, the driving voltage is lowered, the charged carrier is balanced, and the exciton density in the emissive layer (EML) is decreased in the device with n-doped ETL with 8-hydroxyquinolinolatolithium (Liq). High luminance of almost 70,000 cd m<sup>−2</sup> and high current efficiency of 40.5 cd A<sup>−1</sup> at high luminance of 10,000 cd m<sup>−2</sup> is achieved in the device with 50 wt%-Liq-doped ETL. More importantly, the extended operational lifetime of 1945 h is recorded at the initial luminance of 1000 cd m<sup>−2</sup> in the 50 wt%-Liq-doped device, which is longer than that of the device with non-doped ETL by almost 10 times. This result manifests the potential application of tetradentate Pt(II) complexes in the OLED industry. |
topic |
tetradentate Pt(II) complexes organic light-emitting diodes operational lifetime |
url |
https://www.mdpi.com/1420-3049/26/7/1835 |
work_keys_str_mv |
AT weiqiangliu improvedefficiencyrolloffandoperationallifetimeoforganiclightemittingdiodeswithatetradentateplatinumiicomplexbyusinganndopedelectrontransportinglayer AT liangzhou improvedefficiencyrolloffandoperationallifetimeoforganiclightemittingdiodeswithatetradentateplatinumiicomplexbyusinganndopedelectrontransportinglayer AT longyijin improvedefficiencyrolloffandoperationallifetimeoforganiclightemittingdiodeswithatetradentateplatinumiicomplexbyusinganndopedelectrontransportinglayer AT gangcheng improvedefficiencyrolloffandoperationallifetimeoforganiclightemittingdiodeswithatetradentateplatinumiicomplexbyusinganndopedelectrontransportinglayer |
_version_ |
1724204118786965504 |