Guldin, S;
Docampo, P;
Stefik, M;
Kamita, G;
Wiesner, U;
Snaith, HJ;
Steiner, U;
(2012)
Layer-by-Layer Formation of Block-Copolymer-Derived TiO2 for Solid-State Dye-Sensitized Solar Cells.
Smalkl
, 8
, Article 3. 10.1002/smll.201102063.
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Abstract
Morphology control on the 10 nm length scale in mesoporous TiO2 films is crucial for the manufacture of high-performance dye-sensitized solar cells. While the combination of block-copolymer self-assembly with solgel chemistry yields good results for very thin films, the shrinkage during the film manufacture typically prevents the build-up of sufficiently thick layers to enable optimum solar cell operation. Here, a study on the temporal evolution of block-copolymer-directed mesoporous TiO2 films during annealing and calcination is presented. The in-situ investigation of the shrinkage process enables the establishment of a simple and fast protocol for the fabrication of thicker films. When used as photoanodes in solid-state dye-sensitized solar cells, the mesoporous networks exhibit significantly enhanced transport and collection rates compared to the state-of-the-art nanoparticle-based devices. As a consequence of the increased film thickness, power conversion efficiencies above 4% are reached.
| Type: | Article |
|---|---|
| Title: | Layer-by-Layer Formation of Block-Copolymer-Derived TiO2 for Solid-State Dye-Sensitized Solar Cells |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/smll.201102063 |
| Publisher version: | http://dx.doi.org/10.1002/smll.201102063 |
| Language: | English |
| Additional information: | The authors acknowledge Dr. M. Kolle for help with graphics design and Prof. D. Eder for useful discussions. This publication is based on work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST), the European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 246124, the EPSRC (EP/F056702/1 and EP/F065884/1), the Department of Energy (DE-FG02 87ER45298) through the Cornell Fuel Cell Institute (CFCI), and the National Science Foundation (DMR-1104773). M. S. was supported by the Cornell Fuel Cell Institute and the Energy Materials Center at Cornell (EMC2), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001086. This is the peer reviewed version of the following article: Guldin, S et al, which has been published in final form at 10.1002/smll.201102063 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving. |
| 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.ucl.ac.uk/id/eprint/1446959 |
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