Charge transfer at organic semiconductor hetero-interfaces: Towards a unified picture in intermediate cases of ground state and excited state scenarios

在本论文中，我们利用三个小组的联合专业知识研究了有机半导体异质界面上的电荷转移。我们的目标是通过结合互补的实验技术，包括生长和结构研究、电输运研究、光谱学和电子结构分析，对所涉及的电子过程和光学性质有一个全面的了解。参与分子之间的相互作用出现在基态和光激发后。将确定合适的材料组合，允许电荷在相互界面上转移，并研究所得到的有机半导体异质结构的电子特性。重点关注电荷转移的程度、结合能和电荷转移态的各向异性以及态密度的形状。

In this proposal, we study the charge transfer at organic semiconductor hetero-interfaces using the joint expertise of three groups. Our aim is to obtain a comprehensive understanding of the electronic processes and optical properties involved by combining complementary experimental techniques, including growth and structural studies, electrical transport investigations, optical spectroscopy and analysis of the electronic structure. Interaction between the involved molecules appear both in the ground state and after optical excitation. Suitable material combinations allowing for charge transfer across their mutual interfaces will be identified and the electronic properties of the resulting organic semiconductor heterostructures will be studied. The focus is on the degree of charge transfer, the binding energy and the anisotropy of the charge transfer state, as well as the shape of density of states.