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Investigation of Intrachain Exciton Diffusion of MEH-PPV in Solution with Different Polarity
Xue-cong Li*1, Qi-lin Yuan2, Fang Zhang1, Han-zhuang Zhang2
1.Department of Physics, Tianjin Polytechnic University, TianJin 300387, China;2.Femtosecond laser laboratory, College of Physics, Jilin University, Changchun 130012, China
Abstract:
Femtosecond time-resolved transient grating technique was adopted to insight into the intra-chain exciton diffusion of MEH-PPV in solution with different polarity. Broadband white-light continuum was introduced as the probe to observe the transient absorption and the femtosecond time-resolved transient grating information simultaneously. The vibrational dephasing behaviors, single exciton relaxation, and population relaxation dynamics of MEH-PPV were systematically investigated. The result shows that the relaxation processes of the sample solution will be accelerated in the solvent with larger polarity.
Key words:  Transient grating, Exciton diffusion, Poly[2-methoxy-5-(2'-ethylhexoxy)]-1,4-phenylene vinylene
FundProject:
附件
不同极性溶液中MEH-PPV链内激子扩散的研究
李雪璁*1, 袁启霖2, 张 芳1, 张汉壮2
1.天津工业大学应用物理系,天津 300387;2.吉林大学物理学院,长春 130012
摘要:
本文采用飞秒时间分辨瞬态光栅技术研究了MEH-PPV在不同极性溶液中的内激子扩散行为. 采用宽带连续白光同时探测瞬态吸收和瞬态光栅信息. 系统地研究了MEH-PPV的振动失相行为以及单激子弛豫和粒子数弛豫动力学. 结果表明,在极性较大的溶剂中,样品溶液的弛豫扩散过程会加快.
关键词:  瞬态光栅,激子扩散,MEH-PPV
DOI:10.1063/1674-0068/cjcp1806134
分类号: