Efficient organic/polycrystalline silicon hybrid solar cells. (January 2015)

• Record Type: Journal Article
• Authors: Liu, Qiming; Ohki, Tatsuya; Liu, Dequan; Sugawara, Hiromitsu; Ishikawa, Ryo; Ueno, Keiji; Shirai, Hajime
• Is Part Of: Nano energy. Volume 11(2015:Jan.)
• Page Start: 260
• Page End: 266
• Publication Date: 2015-01
• Subjects: Polycrystalline silicon -- Hybrid solar cells -- Surface passivations -- Conjugated polymers -- Bulk heterojunctions; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2014.10.032
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: We firstly investigated efficient poly(3, 4-ethylenedioxythiophene): poly(styrenesulfonic acid) (PEDOT:PSS)/n-type polycrystalline silicon (p-Si) heterojunction solar cells fabricated by chemical mist deposition (CMD) using a high-pressure H2 O-vapor-treated p-Si prior to organic film deposition. High-pressure H2 O vapor treatment of the p-Si efficiently suppressed grain boundary defects and improved carrier transport at the PEDOT:PSS/p-Si interface. Furthermore, compared to spin coated devices, the CMD devices demonstrated a more uniform photovoltaic performance. The power conversion efficiency of the PEDOT:PSS/p-Si heterojunction solar cells was 9.7% with a short-circuit current density of 33.5 mA/cm 2, an open-circuit voltage of 0.54 V, and a fill factor of 0.53. These findings suggest that CMD with a negatively charged mist precursor provides uniform adhesion of PEDOT:PSS on p-Si, resulting in increased photovoltaic performance. Graphical abstract: Highlights: Efficient PEDOT:PSS/polycrystalline Si hybrid solar cell has been firstly demonstrated. Sufficient passivation of polycrystalline Si wafer through high pressure water vapor treatment. Uniform coating of conjugated polymer thin films(PEDOT:PSS) on the top of nanostructured polycrystalline Si substrates