期刊
NANO ENERGY
卷 12, 期 -, 页码 794-800出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2015.01.045
关键词
TiO2 mesoporous films; Binder-free TiO2; nanoparticle pastes; Crack formation; Electrospon nanofibers; Dye-sensitized solar cells; Photoanodes
类别
资金
- National Aeronautics and Space Administration (NASA) of the United States [NNX13AD31A, NNX14AN22A]
- Office of Integrative Activities
- Office Of The Director [1355423] Funding Source: National Science Foundation
TiO2 mesoporous films have attracted growing interests for many energy conversion and storage applications. During preparation of the TiO2 films from binder-free nanoparticle pastes, the formation of cracks is a challenging issue. Herein, we report two facile methods to prepare TiO2 mesoporous films from a binder-free TiO2 nanoparticle paste with significantly reduced crack formation via incorporation of either thin electrospun SiO2 nanofibrous mat or short electrospun TiO2 nanofibers. The reduction of crack formation (i.e., the improvement of film integrity) of the binder-free TiO2 mesoporous films was investigated by optical microscopy and scanning electron microscopy. Thereafter, these films were studied as photoanodes in quasi-solid-state dye-sensitized solar cells; and the assembled devices exhibited energy conversion efficiencies of 4.5% with stable performances over long storage time. (C) 2015 Elsevier Ltd. All rights reserved.
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