Photohole screening effects in polythiophenes with pendant groups

被引:23
作者
Feng, DQ
Caruso, AN
Schulz, DL
Losovyj, YB
Dowben, PA [1 ]
机构
[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA
[2] Univ Nebraska, Ctr Mat Res & Anal, Lincoln, NE 68588 USA
[3] N Dakota State Univ, Ctr Nanoscale Sci & Engn, Fargo, ND 58102 USA
[4] Louisiana State Univ, Ctr Adv Microstruct & Devices, Baton Rouge, LA 70806 USA
关键词
D O I
10.1021/jp052712n
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We compare two mechanisms that dominate the temperature-dependent changes in electronic structure for poly(3-hexylthiophene-2,5 diyl) (P3HT). Structural changes in the relative orientation and configuration of the aromatic ring backbone are observed to occur over a wide range in temperature and affect the local final state screening in photoemission. There are also changes in conductivity and carrier concentration at lower temperatures leading to altered long-range intramolecular screening of photolioles and final state effects that affect excitation spectroscopies including photoemission. For polyethylenedioxythiophene (PEDOT), temperature-dependent changes in the structure and configuration of the polymer backbone are not as significant, although temperature-dependent final state effects are observed.
引用
收藏
页码:16382 / 16389
页数:8
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