Docampo, P;
Guldin, S;
Stefik, M;
Tiwana, P;
Orilall, MC;
Huettner, S;
Sai, H;
... Snaith, HJ; + view all
(2010)
Control of Solid-State Dye-Sensitized Solar Cell Performance by Block-Copolymer-Directed TiO2 Synthesis.
Advanced Functional Materials
, 20
(11)
1787 - 1796.
10.1002/adfm.200902089.
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Abstract
Hybrid dye-sensitized solar cells are typically composed of mesoporous titania (TiO2), light-harvesting dyes, and organic molecular hole-transporters. Correctly matching the electronic properties of the materials is critical to. ensure efficient device operation. In this study, TiO2 is synthesized in a well-defined morphological confinement that arises from the self-assembly of a diblock copolymer-poly(isoprene-b-ethylene oxide) (Pl-b-PEO). The crystallization environment, tuned by the inorganic (TiO2 mass) to organic (polymer) ratio, is shown to be a decisive factor in determining the distribution of sub-bandgap electronic states and the associated electronic function in solid-state dye-sensitized solar cells. Interestingly, the tuning of the sub-bandgap states does not appear to strongly influence the charge transport and recombination in the devices. However, increasing the depth and breadth of the density of sub-bandgap states correlates well with an increase in photocurrent generation, suggesting that a high density of these sub-bandgap states is critical for efficient photo-induced electron transfer and charge separation.
| Type: | Article |
|---|---|
| Title: | Control of Solid-State Dye-Sensitized Solar Cell Performance by Block-Copolymer-Directed TiO2 Synthesis |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/adfm.200902089 |
| Publisher version: | http://dx.doi.org/10.1002/adfm.200902089 |
| Language: | English |
| Additional information: | This is the peer reviewed version of the following article: 'Docampo, P., Guldin, S., Stefik, M., Tiwana, P., Orilall, M. C., Hüttner, S., Sai, H., Wiesner, U., Steiner, U. and Snaith, H. J (2010) Control of Solid-State Dye-Sensitized Solar Cell Performance by Block-Copolymer-Directed TiO2 Synthesis. Advanced Functional Materials , 20 (11) 1787 - 1796', which has been published in final form at http://dx.doi.org/10.1002/adfm.200902089. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.This work was funded in part by by the EPSRC Nanotechnology Grand Challenges Energy grant (EP/F056702/1), and EP/F065884/1, the Department of Energy (DE-FG02 87ER45298) through the Cornell Fuel Cell Institute (CFCI), the National Science Foundation (DMR-0605856), and the Cornell Universiy KAUST Center for Research and Education. S.H. acknowledges a scholarship of the Bayerische Graduiertenforderung and funding from European RTN-6 Network “Polyfilm”. |
| Keywords: | MESOPOROUS MOLECULAR-SIEVES; ELECTRON-TRANSPORT; TRANSIENT PHOTOCURRENT; NANOCRYSTALLINE TIO2; SPIRO-OMETAD; METAL-OXIDES; THIN-FILMS; RECOMBINATION; EFFICIENCY; MECHANISM research-areas: Chemistry; Science & Technology - Other Topics; Materials Science; Physics web-of-science-categories: Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1446951 |
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