scholarly journals 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 ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1835
Author(s):  
Weiqiang Liu ◽  
Liang Zhou ◽  
Long Yi Jin ◽  
Gang Cheng
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Driving Voltage ◽  
High Luminance ◽  
High Current Efficiency ◽  
Light Emitting ◽  
Organic Light ◽  
Operational Lifetime ◽  
Electron Transporting Layer ◽  
Charged Carrier

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−2 and high current efficiency of 40.5 cd A−1 at high luminance of 10,000 cd m−2 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−2 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.

scholarly journals Flexible organic light-emitting diodes for antimicrobial photodynamic therapy

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Cheng Lian ◽  
Marta Piksa ◽  
Kou Yoshida ◽  
Saydulla Persheyev ◽  
Krzysztof J. Pawlik ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Bacterial Infections ◽  
Light Emitting Diodes ◽  
High Irradiance ◽  
Organic Light Emitting Diodes ◽  
Light Sources ◽  
Driving Voltage ◽  
Light Emitting ◽  
Organic Light ◽  
Operational Lifetime

Abstract Bacterial infection and the growth of antibiotic resistance is a serious problem that leads to patient suffering, death and increased costs of healthcare. To address this problem, we propose using flexible organic light-emitting diodes (OLEDs) as light sources for photodynamic therapy (PDT) to kill bacteria. PDT involves the use of light and a photosensitizer to generate reactive oxygen species that kill neighbouring cells. We have developed flexible top-emitting OLEDs with the ability to tune the emission peak from 669 to 737 nm to match the photosensitizer, together with high irradiance, low driving voltage, long operational lifetime and adequate shelf-life. These features enable OLEDs to be the ideal candidate for ambulatory PDT light sources. A detailed study of OLED–PDT for killing Staphylococcus aureus was performed. The results show that our OLEDs in combination with the photosensitizer methylene blue, can kill more than 99% of bacteria. This indicates a huge potential for using OLEDs to treat bacterial infections.

Low driving voltage and high stability organic light-emitting diodes with rhenium oxide-doped hole transporting layer

2007 ◽  
Vol 91 (1) ◽  
pp. 011113 ◽  
Author(s):  
Dong-Seok Leem ◽  
Hyung-Dol Park ◽  
Jae-Wook Kang ◽  
Jae-Hyun Lee ◽  
Ji Whan Kim ◽  
...  
Keyword(s):  
High Stability ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Driving Voltage ◽  
Rhenium Oxide ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Transporting

Highly efficient bluish green organic light-emitting diodes of iridium(iii) complexes with low efficiency roll-off

2018 ◽  
Vol 47 (22) ◽  
pp. 7587-7593 ◽  
Author(s):  
Ning Su ◽  
Zheng-Guang Wu ◽  
You-Xuan Zheng
Keyword(s):  
Current Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Current ◽  
High Current Efficiency ◽  
Light Emitting ◽  
Organic Light ◽  
Bluish Green ◽  
Low Efficiency

Two efficient bluish green iridium(iii) complexes were applied as emitters in the organic light-emitting diodes, which showing high current efficiency of 58.17 cd A−1 and external quantum efficiency of 25.33% with low efficiency roll-off.

High efficiency blue/green/yellow/red fluorescent organic light-emitting diodes sensitized by phosphors: general design rules and electroluminescence performance analysis

2019 ◽  
Vol 7 (36) ◽  
pp. 11293-11302 ◽  
Author(s):  
Jingwen Yao ◽  
Shian Ying ◽  
Qian Sun ◽  
Yanfeng Dai ◽  
Xianfeng Qiao ◽  
...  
Keyword(s):  
Performance Analysis ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Luminance ◽  
Design Rules ◽  
Light Emitting ◽  
General Design ◽  
Organic Light

Phosphor sensitized fluorescent organic light-emitting diodes realize high efficiency and low roll-off at high luminance.

High-Luminance Top-Emitting Organic Light-Emitting Diodes Using Cs∕Al∕Au as the Semitransparent Multimetal Cathode

2007 ◽  
Vol 154 (10) ◽  
pp. J302 ◽  
Author(s):  
J. T. Lim ◽  
C. H. Jeong ◽  
J. H. Lee ◽  
G. Y. Yeom ◽  
E.-C. Shin ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Luminance ◽  
Light Emitting ◽  
Organic Light

scholarly journals Realization of high-efficiency fluorescent organic light-emitting diodes with low driving voltage

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Amin Salehi ◽  
Chen Dong ◽  
Dong-Hun Shin ◽  
Liping Zhu ◽  
Christopher Papa ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Driving Voltage ◽  
Light Emitting ◽  
Organic Light
Sign in / Sign up

Export Citation Format

Share Document