期刊
PHYSICAL REVIEW B
卷 83, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.121306
关键词
-
资金
- National Science Foundation
- Center for Advanced Molecular Photovoltaics [KUS-C1-015-21]
- AFOSR [FA9550-09-1-0436]
We quantify the degree of paracrystalline disorder in the pi-pi stacking direction of crystallites of a high performing semicrystalline semiconducting polymer with advanced x-ray line-shape analysis. Using density functional theory calculations to provide input to a simple tight-binding model, we obtain the density of states of a system of pi-pi stacked polymer chains with increasing amounts of paracrystalline disorder. We find that, for an aligned film of PBTTT, the paracrystalline disorder is 7.3%. This type of disorder induces a tail of trap states with a breadth of similar to 100 meV as determined through calculation. This finding agrees with previous device modeling and provides physical justification for the mobility edge model.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据