[15p-P13-1~17] 16.3 Bulk, thin-film and other silicon-based solar cells

▲ [15p-P13-2] Nafion-Modified PEDOT:PSS/c-Si Solar Cells

〇Qiming Liu¹, Jaker Hossain¹, Takuya Miura¹, Daisuke Harada¹, Ryo Ishikawa¹, Keiji Ueno¹, Hajime Shirai¹ (1.Saitama Univ.)

Keywords:heterojunction solar cells, PEDOT:PSS, Nafion

We demonstrate the chemistry of amphiphilic perfluorosulfonic copolymer Nafion-coated conductive PEDOT:PSS and its effect on the photovoltaic performance of PEDOT:PSS/Si heterojunction solar cells. In this study, solution-processed Nafion-modified PEDOT:PSS/c-Si heterojunction solar cells exhibited a higher power conversion efficiency over 14% with better stability for light soaking rather than the pristine device by adjusting the layer thickness of Nafion. These findings originate from following contributions, i.e., 1) Increased carrier mobility due to the extension of π-conjugation of PEDOT, 2) the resistance of the moisture and impurity due to Nafion layer, 3) Nafion over layer acts as an antireflection layer and 4) Silver paste as a top grid electrode diffuse and/or preferentially dissolved with Nafion, resulting in a good contact with underneath Nafion-modified PEDOT:PSS.