TAILIEUCHUNG - Báo cáo hóa học: " Modification of Conductive Polymer for Polymeric Anodes of Flexible Organic Light-Emitting Diodes"

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: Modification of Conductive Polymer for Polymeric Anodes of Flexible Organic Light-Emitting Diodes | Nanoscale Res Lett 2009 4 613-617 DOI s11671-009-9288-8 NANO EXPRESS Modification of Conductive Polymer for Polymeric Anodes of Flexible Organic Light-Emitting Diodes Guang-Feng Wang Xiao-Ming Tao John H. Xin Bin Fei Received 24 January 2009 Accepted 5 March 2009 Published online 17 March 2009 to the authors 2009 Abstract A conductive polymer poly 3 4-ethylenedi-oxythiophene poly styrene sulfonate PEDOT PSS was modified with dimethyl sulfoxide DMSO in solution state together with sub-sequential thermal treatment of its spin-coated film. The electrical conductivity increased by more than three orders of magnitude improvement was achieved. The mechanism for the conductivity improvement was studied at nanoscale by particle size analysis field emission scanning electron microscopy FESEM and X-ray photoelectron spectroscopy XPS . Smaller particle size was observed resulting in larger contact area and better electrical conductive connections. Connection of conductive PEDOT increased on the surface of the PEDOT PSS particles which promoted high conductivity. Flexible anodes based on the modified PEDOT PSS were fabricated. Flexible organic light-emitting diodes FOLED based the polymeric anodes have a comparable performance to those on indium-tin-oxide ITO anodes. Keywords PEDOT PSS Polymeric anode Organic light-emitting diodes OLEDs Field emission scanning electron microscopy FESEM X-ray photoelectron spectroscopy XPS Introduction Conjugated conductive polymers have seen prosperous applications . printed sensors or timers electronic newspaper wearable electronics and displays. Poly 3 4- . Wang . Tao H J. H. Xin B. Fei Institute of Textiles and Clothing The Hong Kong Polytechnic University Hong Kong China e-mail tctaoxm@ ethylenedioxythiophene PEDOT a derivative of polythiophene firstly developed by Bayer AG research laboratories shows excellent transparency in the visible region good electrical conductivity and environmental stability 1

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