The Formation of Ti-H Species at Interface Is Lethal to the Efficiency of TiO-Based Dye-Sensitized Devices.
TiO-based dye-sensitization cycle is one of the basic strategies for the development of solar energy applications. Although the power conversion efficiency (PCE) of dye-sensitized devices has been improved through constant attempts, the intrinsically fatal factor that leads to the complete failure o...
| Publicado en: | Journal of the American Chemical Society Vol. 139; no. 30; pp. 2083 - 2090 |
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| Autores principales: | , , , , , , , , , |
| Formato: | Artículo |
| Publicado: |
American Chemical Society
8/2/2017
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=128663458&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 128663458 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 8/2/2017 vid: 139 iid: 30 pid: 997 pub: American Chemical Society artinfo: ui: 128663458 10.1021/jacs.6b12324 ppf: 2083 ppct: 7 formats: tig: atl: The Formation of Ti-H Species at Interface Is Lethal to the Efficiency of TiO-Based Dye-Sensitized Devices. aug: au: Yan, Yan Shi, Weidong Yuan, Zhen He, Shenggui Li, Dongmei Meng, Qingbo Ji, Hongwei Chen, Chuncheng Ma, Wanhong Zhao, Jincai affil: Key Laboratory of Photochemistry and State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China 100190 School of Chemistry and Chemical Engineering, Jiangsu University, No. 301, Xuefu Road, Zhenjiang, P. R. China 212013 Key Laboratory for Renewable Energy (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, P. R. China 100190 su: Solar energy Fourier transform infrared spectroscopy Hydrophilic compounds Renewable energy sources Environmental physics sug: subj: Solar energy Fourier transform infrared spectroscopy Hydrophilic compounds Renewable energy sources Environmental physics ab: TiO-based dye-sensitization cycle is one of the basic strategies for the development of solar energy applications. Although the power conversion efficiency (PCE) of dye-sensitized devices has been improved through constant attempts, the intrinsically fatal factor that leads to the complete failure of the PCE of TiO-mediated dye-sensitized devices has not yet been determined. Here, by using isotopically labeled MAS-H NMR, ATR-FTIR spectroscopy (separate H/D and Ti/Ti experiments), and ESR, we revealed that the accumulative formation of Ti-H species on the TiO surface is the intrinsic cause of the PCE failure of TiO-based dye-sensitization devices. Such a Ti-H species is generated from the reduction of hydrogen ions (mostly released from dye carboxyl groups or organic electrolyte) accompanied by electron injection on the surface of TiO, which deteriorates the PCE mainly by reducing the electrical conductivity of the TiO (by a maximum of ∼80%) and the hydrophilic nature of the TiO surface (contact angle increased). pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2017 holdings: @attributes: islocal: N |
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