[15p-302-1~7] Perspectives on In-situ Observations during the Preparation of Organic Thin Film Devices

[15p-302-7] In situ Observation of Solution Process for Research on Organic Photovoltaics

〇Yuji Yoshida¹, Tetsuhiko Miyadera¹, Masayuki Chikamatsu¹ (1.RCPV AIST)

Keywords:in situ observation, organic photovoltaic cell, solution process

As one of typical applications of in situ observation, we introduce to control bulk heterojunction in organic photovoltaic cells. Usually, mixed layers of P3HT and PCBM were used as a photovoltaic layer, and the spin-coating films were prepared from the o-dichlorobenzene solution. In this time, we prepared the bulk heterojunction structure from the chloroform solution with low boiling point. By controlling drying speed, we have been able to control the bulk heterojunction structure. Especially, we confirmed the various structure formation by using in situ observation of grazing incidence X-ray diffraction and ultraviolet and visible light absorption spectroscopy.