Studies to improve conversion efficiency of thin film organic photovoltaic cells via development of novel filling process of organic semiconductor materials

提出了一种理想的薄膜有机光伏电池(OPVC)结构，以实现与硅基电池相当的高能量转换效率，其中两种类型的有机半导体以有序的方式交指。在这项研究中，我应用了自己开发的温度驱动超临界流体沉积(TSFD)技术，将有机半导体完全填充到纳米级的三维特征中。在对有机光伏材料的沉积行为与衬底温度、流量等的关系进行了基础性研究后，我们成功地在硅沟槽(1微米宽、10微米深)上填充了菲。

An "ideal" structure for thin film organic photovoltaic cell (OPVC) is proposed to achieve high energy conversion efficiency comparable with silicon-base cells, in which two types of organic semiconductors are interdigitated in an ordered fashion. In this research, I applied temperature-driven supercritical fluid deposition (TSFD), which has been developed by myself, to make a complete filling of organic semiconductors to nano-scale 3-dimensional features. After the fundamental studies including dependence of deposition behavior on substrate temperature, flow rate, etc., an organic photovoltaic material, anthracene was successfully filled onto Si trenches (1-um-width and 10-um-depth).