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Báo cáo hóa học: " Electroluminescent Characteristics of DBPPV–ZnO Nanocomposite Polymer Light Emitting Devices"
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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Electroluminescent Characteristics of DBPPV–ZnO Nanocomposite Polymer Light Emitting Devices | Nanoscale Res Lett 2009 4 485-490 DOI 10.1007 S11671-009-9261-6 NANO PERSPECTIVES Electroluminescent Characteristics of DBPPV-ZnO Nanocomposite Polymer Light Emitting Devices M. V. Madhava Rao Yan Kuin Su Tsung Syun Huang Chen-Han Yeh Ming-Lung Tu Received 5 August 2008 Accepted 27 January 2009 Published online 18 February 2009 to the authors 2009 Abstract We have demonstrated that fabrication and characterization of nanocomposite polymer light emitting devices with metal Zinc Oxide ZnO nanoparticles and 2 3-dibutoxy-1 4-poly phenylenevinylene DBPPV . The current and luminance characteristics of devices with ZnO nanoparticles are much better than those of device with pure DBPPV. Optimized maximum luminance efficiencies of DBPPV-ZnO 3 1 wt before annealing 1.78 cd A and after annealing 2.45 cd A having a brightness 643 and 776 cd m2 at a current density of 36.16 and 31.67 mA cm2 are observed respectively. Current density-voltage and brightness-voltage characteristics indicate that addition of ZnO nanoparticles can facilitate electrical injection and charge transport. The thermal annealing is thought to result in the formation of an interfacial layer between emissive polymer film and cathode. Keywords Polymer light emitting devices Electroluminescent ZnO nanoparticle Surface morphology Thermal annealing Introduction Polymer light emitting devices PLEDs have attracted much attention in recent years due to their potential applicability to flat large area displays 1-3 . Major important technological issues related to commercial M. V. Madhava Rao El Y. K. Su T. S. Huang C.-H. Yeh M.-L. Tu Institute of Microelectronics Department of Electrical Engineering Advanced Optoelectronic Technology Center National Cheng Kung University Tainan 701 Taiwan ROC e-mail madhavmora@yahoo.com applications are the quantum efficiency device stability and easy fabrication. Among the conjugated polymers polyphenylenevinylene PPV -based light emitting diodes are limited by their low quantum .