Počet záznamů: 1
Photocurrent Enhanced by Singlet Fission in a Dye-Sensitized Solar Cell
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SYSNO ASEP 0443599 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Photocurrent Enhanced by Singlet Fission in a Dye-Sensitized Solar Cell Tvůrce(i) 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)Celkový počet autorů 8 Zdroj.dok. ACS Applied Materials and Interfaces. - : American Chemical Society - ISSN 1944-8244
Roč. 7, č. 4 (2015), s. 2286-2293Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova photovoltaics ; singlet fission ; triplet ; spectroscopy ; charge transfer ; photocurrent Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Institucionální podpora UOCHB-X - RVO:61388963 UT WOS 000349137300020 EID SCOPUS 84922475031 DOI 10.1021/am506329v Anotace 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. Pracoviště Ústav organické chemie a biochemie Kontakt asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434 Rok sběru 2016
Počet záznamů: 1