DataVXACS Applied Materials & InterfacesPaper
journal article·2017-03-29

Highly Simplified Tandem Organic Light-Emitting Devices Incorporating a Green Phosphorescence Ultrathin Emitter within a Novel Interface Exciplex for High Efficiency

Ting Xu, Jun-Gui Zhou, Chen-Chao Huang, Lei Zhang, Man-Keung Fung, Imran Murtaza, Hong Meng, Liang-Sheng Liao

ACS Applied Materials & Interfaces· Volume 9· Issue 12
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Source abstract

Abstract

Herein we report a novel design philosophy of tandem OLEDs incorporating a doping-free green phosphorescent bis[2-(2-pyridinyl-N)phenyl-C](acetylacetonato)iridium(III) (Ir(ppy)2(acac)) as an ultrathin emissive layer (UEML) into a novel interface-exciplex-forming structure of 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) and 1,3,5-tri(p-pyrid-3-yl-phenyl)benzene (TmPyPB). Particularly, relatively low working voltage and remarkable efficiency are achieved and the designed tandem OLEDs exhibit a peak current efficiency of 135.74 cd/A (EQE = 36.85%) which is two times higher than 66.2 cd/A (EQE = 17.97%) of the device with a single emitter unit. This might be one of the highest efficiencies of OLEDs applying ultrathin emitters without light extraction. Moreover, with the proposed structure, the color gamut of the displays can be effectively increased from 76% to 82% NTSC if the same red and blue emissions as those in the NTSC are applied. A novel form of harmonious fusion among interface exciplex, UEML, and tandem structure is successfully realized, which sheds light on further development of ideal OLED structure with high efficiency, simplified fabrication, low power consumption, low cost, and improved color gamut, simultaneously.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Organic Light-Emitting Diodes Research · Organic Electronics and Photovoltaics · Luminescence and Fluorescent Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China

School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen 518055, China

Key Laboratory of Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Centre for Advanced Materials, Nanjing Tech University, Nanjing 211816, China

Department of Physics, International Islamic University, Islamabad 44000, Pakistan

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Guangdong Academician Workstation · Shenzhen Science and Technology Innovation Committee · Shenzhen Key Laboratory of Organic Optoelectromagnetic Functional Materials of Shenzhen Science and Technology Plan · Guangdong Province · Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University · Shenzhen Municipality · Priority Academic Program Development of Jiangsu Higher Education Institutions

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