[16p-P4-1~8] 6.6 Probe Microscopy

[16p-P4-5] Evaluation of bulk hetero-junction organic thin-film solar cells by STM

〇Osamu Takeuchi¹, Keishiro Murao¹, Takahiro Ochiai², Fuazerururahaman Ohashi¹, Kazutaka Shinohara¹, Takeshi Yasuda³, Shoji Yoshida¹, Hidemi Shigekawa¹ (1.Univ. of Tsukuba, 2.Takano Co., Ltd., 3.NIMS)

Keywords:Organic thin-film solar cells, Scanning tunneling microscopy

We developed a new scanning tunneling microscopy (STM) apparatus that can apply photo-excited STM and STM photoemission spectroscopy on a same organic solar cell specimen, to visualize nanoscale variation of generation efficiency on the solar cell due to the inhomogeneity of the organic thin films by photo-excited STM and to clarify the physical factor that limits the efficiency by combining photo-excited STM and STM photoemission spectroscopy. In this presentation, we report the recent result obtained by the STM on P3HT:PCBM bulk hetero-junction organic thin-film solar cell.