ACS Macro Lett
Fukuoka i3-Center for Organic Photonics and Electronics Research (i3-OPERA), Fukuoka 819-0388, Japan.
Published: July 2016
We report on the realization of polymer light-emitting diodes (PLEDs) based on fluorescent polythiophene (PT)-based insulated molecular wires (IMWs). PLEDs using PT emitting layers traditionally have low external quantum efficiencies (η) below 0.1%. Moreover, IMWs lack a thorough exploitation for electroluminescent applications due to concerns about reduced charge transport between their chains. We constructed multilayer PLEDs containing PT IMW emitting layers that show the maximum η close to 1.4%, luminance at 3700 cd/m, and low turn on voltage at 2.5 V. We also show a strong influence of the thickness of electron transport layer on η through device optimization and optical simulations.
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http://dx.doi.org/10.1021/acsmacrolett.6b00205 | DOI Listing |
Materials (Basel)
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China Electric Power Research Institute Co., Ltd., Beijing 100192, China.
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Center of Nanomaterials for Renewable Energy (CNRE), State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
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Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan.
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School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.
The incorporation of polymeric insulators has led to notable achievements in the field of organic semiconductors. By altering the blending concentration, polymeric insulators exhibit extensive capabilities in regulating molecular configuration, film crystallinity, and mitigation of defect states. However, current research suggests that the improvement in such physical properties is primarily attributed to the enhancement of thin film morphology, an outcome that seems to be an inevitable consequence of incorporating insulators.
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