Number of the records: 1
Photocurrent Enhanced by Singlet Fission in a Dye-Sensitized Solar Cell
- 1.
SYSNO ASEP 0443599 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Photocurrent Enhanced by Singlet Fission in a Dye-Sensitized Solar Cell Author(s) Schrauben, J. N. (US)
Zhao, Y. (US)
Mercado, C. (US)
Dron, P. I. (US)
Ryerson, J. L. (US)
Michl, Josef (UOCHB-X) RID, ORCID
Zhu, K. (US)
Johnson, J. C. (US)Number of authors 8 Source Title ACS Applied Materials and Interfaces. - : American Chemical Society - ISSN 1944-8244
Roč. 7, č. 4 (2015), s. 2286-2293Number of pages 8 s. Language eng - English Country US - United States Keywords photovoltaics ; singlet fission ; triplet ; spectroscopy ; charge transfer ; photocurrent Subject RIV CF - Physical ; Theoretical Chemistry Institutional support UOCHB-X - RVO:61388963 UT WOS 000349137300020 EID SCOPUS 84922475031 DOI 10.1021/am506329v Annotation Investigations of singlet fission have accelerated recently because of its potential utility in solar photoconversion, although only a few reports definitively identify the role of singlet fission in a complete solar cell. Evidence of the influence of singlet fission in a dye-sensitized solar cell using 1,3-diphenylisobenzofuran (DPIBF, 1) as the sensitizer is reported here. Self-assembly of the blue-absorbing 1 with co-adsorbed oxidation products on mesoporous TiO2 yields a cell with a peak internal quantum efficiency of similar to 70% and a power conversion efficiency of similar to 1.1%. Introducing a ZrO2 spacer layer of thickness varying from 2 to 20 angstrom modulates the short-circuit photocurrent such that it is initially reduced as thickness increases but 1 with 1015 angstrom of added ZrO2. This rise can be explained as being due to a reduced rate of injection of electrons from the S1 state of 1 such that singlet fission, known to occur with a 30 ps time constant in polycrystalline films, has the opportunity to proceed efficiently and produce two T1 states per absorbed photon that can subsequently inject electrons into TiO2. Transient spectroscopy and kinetic simulations confirm this novel mode of dye-sensitized solar cell operation and its potential utility for enhanced solar photoconversion. Workplace Institute of Organic Chemistry and Biochemistry Contact asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434 Year of Publishing 2016
Number of the records: 1