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Singlet Exciton Migration in a Conjugated Polymer by Picosecond Time-Resolved Photoluminescence
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作者 MA Guo-Hong QIAN Shi-Xiong +3 位作者 LEI Hong WANG He-Zhou WANG Rong-Qiu LI Yong-Fang 《Chinese Physics Letters》 SCIE CAS CSCD 2001年第7期944-946,共3页
The transient photoluminescence(PL)of DO-PPV(poly-(2,5-dioctyloxy-1,4-phenylene vinylene))solution in chloroform was investigated by picosecond time-resolved PL spectroscopy.An ultrafast rise of PL and the following s... The transient photoluminescence(PL)of DO-PPV(poly-(2,5-dioctyloxy-1,4-phenylene vinylene))solution in chloroform was investigated by picosecond time-resolved PL spectroscopy.An ultrafast rise of PL and the following single exponential decay with a time constant about 400ps were assigned to the formation of intrachain exciton and its decay process,respectively.The redshift of the PL emission spectrum with time was caused by the subsequent exciton migration among the different conjugated segments in the DO-PPV polymer. 展开更多
关键词 spectroscopy. DECAY EXPONENTIAL
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