Kim, Youngjin Park, Jong Hyuk Jung, Jihoon Lee, Sang-Soo 2024-01-20T08:00:31Z 2024-01-20T08:00:31Z 2021-09-05 2015-02 2040-3364 https://pubs.kist.re.kr/handle/201004/125823 We demonstrate facilitated ion transport in oligomer electrolytes by introducing TiO2 hollow particles of ellipsoidal and spherical shapes. It was found that the TiO2 hollow particles of ellipsoidal shape are much more effective in constructing ionic diffusion paths for the Grotthuss mechanism, resulting in highly enhanced diffusion coefficients of ions such as I- and I-3(-) in oligomer electrolytes. Compared to the hollow spheres of the TiO2 component, the ellipsoidal hollow particles of the TiO2 component provide 11% larger ionic diffusion coefficients, because of their geometry with a relatively small diffusion resistance. Since the facilitated ion transport can render fast redox reactions at both photo and counter electrodes, the solid state dye-sensitized solar cells employing oligomer electrolytes based on the TiO2 hollow ellipsoids exhibit highly improved photovoltaic performances including highly improved energy-conversion efficiency without destabilizing the cell. English ROYAL SOC CHEMISTRY SENSITIZED SOLAR-CELLS OLIGOMER ELECTROLYTES SPHERES NANOSTRUCTURES PARTICLES DIFFUSION PERFORMANCE BATTERIES SHELLS SALTS Geometrical implication of ion transporters employing an ellipsoidal hollow structure in pseudo-solid electrolytes Article 10.1039/c4nr05965d 1 NANOSCALE, v.7, no.6, pp.2729 - 2734 NANOSCALE 7 6 2729 2734 scie scopus 000349472300066 2-s2.0-84922341482 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article SENSITIZED SOLAR-CELLS OLIGOMER ELECTROLYTES SPHERES NANOSTRUCTURES PARTICLES DIFFUSION PERFORMANCE BATTERIES SHELLS SALTS facilitated ion transport TiO2 ellipsoidal hollow particles Grotthuss mechanism