Photo- and electro-luminescent properties of 5,10,15,20-tetra-p-tolyl-21H,23H-porphine doped poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] films |
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Authors: | Guolun Zhong Jun Wu Yonghong Wang Jinbao Xu |
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Affiliation: | a Department of Biological and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, PR China b State Key Laboratory of Polymer Reaction Engineering, College of Material Science and Chemical Engineering, Zhejiang University, Hangzhou 310027, PR China |
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Abstract: | In this work we studied both photoluminescence (PL) and electroluminescence (EL) properties of 5, 10, 15, 20-tetra-p-tolyl-21H, 23H-porphine (TTP) doped poly2-methoxy-5-(2′-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV) with the weight percentages of 0, 0.5, 1, 3, 5, 8 and 12, respectively. In the process of PL the significant energy transfer occurs from MEH-PPV to TTP, even though there is a small spectral overlap between the absorption of TTP and the emission of MEH-PPV. For investigation of the process of EL a series of organic light-emitting diodes were fabricated with the device structure of ITO/PEDOT:PSS/TTP-doped polymer layer/Al (ITO = Indium Tin Oxides; PEDOT:PSS = poly (3,4-oxyethyleneoxythiophene): poly-(styrene sulfonate)). In devices in which the TTP was present at 5% the emission of EL was dominated by TTP; at lower doping levels MEH-PPV emission dominated. Moreover, multi-color emission was observed at the doping level below 5%. On the other hand, the mechanism for the EL process was reported. |
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Keywords: | Optical properties Polymers Photoluminescence Multilayers |
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