论文标题
局部有序无定的有机半导体中状态的密度：指数尾巴的出现
Density of states in locally ordered amorphous organic semiconductors: emergence of the exponential tails
论文作者
论文摘要
我们在无定形有机半导体中提出了一个局部秩序的简单模型，该模型自然会产生与状态的空间相关的指数密度（DOS）。对随机能量景观的主要贡献是由偶极子或四倍体的静电贡献提供的。邻居四极杆或反平行方向的优选平行方向的假设直接导致DOS的指数尾巴的形成，即使对于中等大小的有序域的中等大小也是如此。指数尾部形成对材料微观结构的细节的不敏感性表明，这种机制在无定形有机半导体中很常见。
We present a simple model of the local order in amorphous organic semiconductors which naturally produces a spatially correlated exponential density of states (DOS). The dominant contribution to the random energy landscape is provided by electrostatic contributions from dipoles or quadrupoles. An assumption of the preferable parallel orientation of neighbor quadrupoles or antiparallel orientation of dipoles directly leads to the formation of the exponential tails of the DOS even for a moderate size of the ordered domains. The insensitivity of the exponential tail formation to the details of the microstructure of the material suggests that this mechanism is rather common in amorphous organic semiconductors.
