期刊
ADVANCED ENERGY MATERIALS
卷 1, 期 6, 页码 1169-1175出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201100363
关键词
atomic layer deposition; cadmium sulfide; quantum dot-sensitized solar cells; self-assembled monolayers; titanium dioxide
类别
资金
- Center for Advanced Molecular Photovoltaics [KUS-C1-015-21]
- King Abdullah University of Science and Technology (KAUST)
- Center on Nanostructuring for Efficient Energy Conversion, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Office of Basic Energy Science [DE-SC0001060]
- Albion Walter Hewlett Fellowship
- Stanford Nanocharacterization Laboratory (SNL)
- Center for Polymer Interfaces and Macromolecular Assemblies (CPIMA)
Functioning quantum dot (QD) sensitized solar cells have been fabricated using the vacuum deposition technique atomic layer deposition (ALD). Utilizing the incubation period of CdS growth by ALD on TiO2, we are able to grow QDs of adjustable size which act as sensitizers for solid-state QD-sensitized solar cells (ssQDSSC). The size of QDs, studied with transmission electron microscopy (TEM), varied with the number of ALD cycles from 1-10 nm. Photovoltaic devices with the QDs were fabricated and characterized using a ssQDSSC device architecture with 2,2',7,7'-tetrakis-(N,N-di-p methoxyphenylamine) 9,9'-spirobifluorene (spiro-OMeTAD) as the solid-state hole conductor. The ALD approach described here can be applied to fabrication of quantum-confined structures for a variety of applications, including solar electricity and solar fuels. Because ALD provides the ability to deposit many materials in very high aspect ratio substrates, this work introduces a strategy by which material and optical properties of QD sensitizers may be adjusted not only by the size of the particles but also in the future by the composition.
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