期刊
CHIMIA
卷 67, 期 3, 页码 142-148出版社
SWISS CHEMICAL SOC
DOI: 10.2533/chimia.2013.142
关键词
Core-shell; Dye-sensitized solar cell; Electron lifetime; Photo-capacitor; Spiro-OMeTAD
资金
- BASF SE
- Bundesministerium fur Bildung and Forschung (BMBF)
- Swedish Energy Agency
- Swedish Research Council
- STandUP for Energy program
This paper describes the synthesis and characterization of core-shell structures, based on SnO2 and TiO2, for use in dye-sensitized solar cells (DSc). Atomic layer deposition is employed to control and vary the thickness of the TiO2 shell. Increasing the TiO2 shell thickness to 2 nm improved the device performance of liquid electrolyte-based DSC from 0.7% to 3.5%. The increase in efficiency originates from a higher open-circuit potential and a higher short-circuit current, as well as from an improvement in the electron. lifetime. SnO2-TiO2 core-shell DSC devices retain their photovoltage in darkness for longer than 500 seconds, demonstrating that the electrons are contained in the core material. Finally core-shell structures were used for solid-state DSC applications using the hole transporting material 2,2',7,7',-tetrakis(N,N-di-p-methoxyphenyl-amine)-9,9',-spirofluorene. Similar improvements in device performance were obtained for solid-state DSC devices.
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