Park, Sun Woo Hwang, Dae Sub Kim, Dong Young Kim, Dongho 2024-01-20T18:31:33Z 2024-01-20T18:31:33Z 2022-01-11 2010-10 0009-4536 https://pubs.kist.re.kr/handle/201004/131021 Functionalized porphyrin at beta-positions with carboxylic acid groups was prepared to investigate the photovoltaic function as dye-sensitized nanocrystalline-TiO2 solar cells. The electronic structures of the porphyrin macrocyclic core are strongly coupled with olefinic side chains so that the absorption spectrum exhibits broad and red-shifted Soret and Q-bands. 2b-Zn, which is a metallated porphyrin with 2-propenoic acid groups at two beta-positions, exhibits the power conversion efficiency of 5.18 %. From such photovoltaic performance, we can suggest that multiple pathways through olefinic side chains at two beta-positions enhance the electron injection efficiency. For improvement of the solar cell efficiency, we have employed empirical surface modification which is a post-treatment of the TiO2 film by aqueous TiCl4. As a result, post-TiCl4 treated cell exhibits the power conversion efficiency of 5.37 % and the maximum incident photon to current efficiency of 67.2 % in the Soret band region. English CHINESE CHEMICAL SOC Doubly beta-Functionalized Zinc(II) Porphyrin-sensitized TiO2 Solar Cells Article 10.1002/jccs.201000158 1 JOURNAL OF THE CHINESE CHEMICAL SOCIETY, v.57, no.5B, pp.1111 - 1118 JOURNAL OF THE CHINESE CHEMICAL SOCIETY 57 5B 1111 1118 N scie scopus 000285526000003 2-s2.0-78650943756 Chemistry, Multidisciplinary Chemistry Article; Proceedings Paper NANOCRYSTALLINE TIO2 PHOTOVOLTAIC CELLS GOLD NANOPARTICLES PHOTOELECTROCHEMICAL PROPERTIES SNO2 ELECTRODES TICL4 TREATMENT FILMS CONVERSION DENSITY LIGHT DSSCs Porphyrin TiCl4 treatment