TY - JOUR AU - 박원일 DA - 2015/03 PY - 2015 UR - http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b00178 UR - http://hdl.handle.net/20.500.11754/22701 AB - Three-dimensional (3D), tubular-structured monolayer graphene networks were hybridized with TiO2 nanoparticular layer for futuristic and robust electrode applications. A continuous form of 3D graphene with good carrier mobility provides a direct pathway for electrons to the current collector for a photoanode in dye-sensitized solar cells. This characteristic feature, coupled with its energy level, ensures an enhanced charge collection efficiency. Particular attention was paid to the graphene surface functionalization and the effective loading of TiO2 nanoparticles to improve the light harvesting and minimize electron recombination for a photoanode. The optimal hybrid structure resulted in a 10% enhanced energy conversion efficiency, compared to the TiO2-based analogue without graphene. The impedance spectra confirmed that the increase in photovoltaic performance was mainly driven by the efficient charge collection through the 3D, tubular-structured monolayer graphene. This new electrode prototype can serve as a good complement to conventional TiO2 nanostructures. PB - AMER CHEMICAL SOC KW - SENSITIZED SOLAR-CELLS KW - ELECTRODES KW - FILMS KW - RECOMBINATION KW - TRANSPARENT KW - PHOTOANODES KW - PERFORMANCE KW - STRENGTH KW - DEVICES KW - IONS TI - Three-Dimensional Monolayer Graphene and TiO2 Hybrid Architectures for High-Efficiency Electrochemical Photovoltaic Cells IS - 12 VL - 119 DO - 10.1021/acs.jpcc.5b00178 T2 - JOURNAL OF PHYSICAL CHEMISTRY C ER -