Journal ArticleDOI
Multilayered Semiconductor (CdS/CdSe/ZnS)-Sensitized TiO2 Mesoporous Solar Cells: All Prepared by Successive Ionic Layer Adsorption and Reaction Processes
TLDR
In this article, a model semiconductor-sensitizer layer of CdSe with under- or overlayers of cdS or ZnS by pre- or postadsorption was prepared on the surface of mesoporous TiO2 films by a series of successive ionic layer adsorption and reaction (SILAR) processes.Abstract:
A model semiconductor-sensitizer layer of CdSe with under- or overlayers of CdS or ZnS by pre- or postadsorption was prepared on the surface of mesoporous TiO2 films by a series of successive ionic layer adsorption and reaction (SILAR) processes in solutions containing corresponding cations and anions. The growth of each semiconductor layer was monitored by taking UV−visible absorption spectra and high-resolution transmission electron microscopy (TEM) images. The all SILAR-prepared multicomponent sensitizer consisting of CdS/CdSe/ZnS layers was evaluated in a polysulfide electrolyte solution as a redox mediator in regenerative photoelectrochemical cells. The CdS and ZnS layers with the CdSe layer sandwiched in between were found to significantly enhance photocurrents. The best photovoltaic performance was obtained from the CdS/CdSe/ZnS-sensitizer with the ZnS layer on the top, yielding an overall power conversion efficiency of 3.44% with a mask around the active film and 3.90% with no mask. The effect of ...read more
Citations
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Journal ArticleDOI
Core/shell colloidal quantum dot exciplex states for the development of highly efficient quantum-dot-sensitized solar cells.
Jin Wang,Iván Mora-Seró,Zhenxiao Pan,Ke Zhao,Hua Zhang,Yaoyu Feng,Guang Yang,Xinhua Zhong,Juan Bisquert +8 more
TL;DR: This work reports on using a CdTe/CdSe type-II core/shell QD sensitizer with an absorption range extending into the infrared region because of its exciplex state, which is covalently linked to TiO2 mesoporous electrodes by dropping a bifunctional linker molecule mercaptopropionic acid (MPA)-capped QD aqueous solution onto the film electrode.
Journal ArticleDOI
Quantum dot-sensitized solar cells—perspective and recent developments: A review of Cd chalcogenide quantum dots as sensitizers
TL;DR: In this article, the concept and mechanism behind quantum dot-sensitized solar cells (QDSSCs) are reviewed, and possible approaches for improving the Cd chalcogenide QDSSC performance are also discussed.
Journal ArticleDOI
High-performance quantum dot-sensitized solar cells based on sensitization with CuInS2 quantum dots/CdS heterostructure
TL;DR: In this paper, a high performance quantum dot-sensitized solar cell (QDSSC) is reported, which consists of a TiO2/CuInS2-QDs/CdS/ZnS photoanode, a polysulfide electrolyte, and a CuS counter electrode.
Journal ArticleDOI
Highly Efficient Inverted Type-I CdS/CdSe Core/Shell Structure QD-Sensitized Solar Cells
TL;DR: The modified deposition technique with use of linker molecule MPA-capped water-soluble QDs and well-developed inverted type-I core/shell structure of the sensitizer together with the sintering treatment of QD-bound TiO(2) electrodes shows a record photovoltaic performance with a conversion efficiency of 5.32%.
Journal ArticleDOI
Recent Advances in Quantum Dot Surface Chemistry
TL;DR: This review addresses three main issues: how surface chemistry affects the optical properties of QDs, how it influences the excited state dynamics, and how one can manipulate surface chemistry to control the interactions between QDs and metal oxides, metal nanoparticles, and in self-assembled QD monolayers.
References
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