Jang, Song-Rim Zhu, Kai Ko, Min Jae Kim, Kyungkon Kim, Chulhee Park, Nam-Gyu Frank, Arthur J. 2024-01-20T16:04:46Z 2024-01-20T16:04:46Z 2021-09-05 2011-10 1936-0851 https://pubs.kist.re.kr/handle/201004/129948 Sensitization of solid-state dye-sensitized solar cells (SSDSSCs) with a new, organic donor-a-acceptor dye with a large molar absorption coefficient led to an open-circuit voltage of over 1V at AM1.5 solar irradiance (100 mW/cm(2)). Recombination of electrons In the TiO(2) film with the oxidized species in the hole-transfer material (HIM) was significantly slower with the organic dye than with a standard ruthenium complex dye. Density functional theory indicated that steric shielding of the electrons in the TiO(2) by the organic dye was important in reducing recombination. Preventing the loss of photoelectrons resulted in a significant voltage gain. There was no evidence that the organic dye contributed to the high voltage by shifting the band edges to more negative electrode potentials. Compared with an iodide-based liquid electrolyte, however, the more positive redox potential of the solid-state HIM used in the SSDSSCs favored higher voltages. English AMER CHEMICAL SOC BAND-EDGE MOVEMENT NANOCRYSTALLINE TIO2 CONVERSION EFFICIENCY CHARGE-TRANSPORT SPIRO-OMETAD RECOMBINATION PERFORMANCE PHOTOVOLTAICS CATIONS DEVICE Voltage-Enhancement Mechanisms of an Organic Dye in High Open-Circuit Voltage Solid-State Dye-Sensitized Solar Cells Article 10.1021/nn2029567 1 ACS NANO, v.5, no.10, pp.8267 - 8274 ACS NANO 5 10 8267 8274 scie scopus 000296208700081 2-s2.0-80054974016 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article BAND-EDGE MOVEMENT NANOCRYSTALLINE TIO2 CONVERSION EFFICIENCY CHARGE-TRANSPORT SPIRO-OMETAD RECOMBINATION PERFORMANCE PHOTOVOLTAICS CATIONS DEVICE high V(oc) solid-state dye-sensitized solar cells spiro-MeOTAD organic sensitizer recombination kinetics