Enhanced Efficiency of Polymer Light-Emitting Diodes by Dispersing Dehydrated Nanotube Titanic Acid in the Hole-buffer Layer |
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| Authors: | L Qian Z Xu F Teng X-X Duan Z-S Jin Z-L Du F-S Li M-J Zheng Y-S Wang |
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| Institution: | (1) Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing, 100044, China;(2) Key Laboratory on special functional materials, Henan University, Kaifeng, 475001, China;(3) Department of Physics, State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, Peking University, Beijing, 100871, China |
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| Abstract: | Efficiency of polymer light-emitting diodes (PLEDs) with poly(2-methoxy-5-(2-ethyl hexyloxy)-p-phenylene vinylene) (MEH-PPV) as an emitting layer was improved if a dehydrated nanotubed titanic acid (DNTA) doped hole-buffer
layer polyethylene dioxythiophene (PEDOT) was used. Photoluminescence (PL) and Raman spectra indicated a stronger interaction
between DNTA and sulfur atom in thiophene of PEDOT, which suppresses the chemical interaction between vinylene of MEH-PPV
and thiophene of PEDOT. The interaction decreases the defect states in an interface region to result in enhancement in device
efficiency, even though the hole transporting ability of PEDOT was decreased. |
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| Keywords: | PLEDs nanotube hole-buffer composite materials energy |
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