Efficient CdSe quantum dot-sensitized solar cells prepared by an improved successive ionic layer adsorption and reaction process.
By Hyojoong Lee, Mingkui Wang, Peter Chen, Daniel R. Gamelin, S. M. Zakeeruddin, M. Graetzel, Md. K. Nazeeruddin. Nano letters (Print), 2009
614 citations recorded by the source corpus.
In pursuit of efficient quantum dot (QD)-sensitized solar cells based on mesoporous TiO(2) photoanodes, a new procedure for preparing selenide (Se(2-)) was developed and used for depositing CdSe QDs in situ over TiO(2) mesopores by the successive ionic layer adsorption and reaction (SILAR) process in ethanol. The sizes and density of CdSe QDs over TiO(2) were controlled by the number of SILAR cycles applied. After some optimization of these QD-sensitized TiO(2) films in regenerative photoelectrochemical cells using a cobalt redox couple [Co(o-phen)(3)(2+/3+)], including addition of a final layer of CdTe, over 4% overall efficiencies were achieved at 100 W/m(2) with about 50% IPCE at its maximum. Light-harvesting properties and transient voltage decay/impedance measurements confirmed that CdTe-terminated CdSe QD cells gave better charge-collection efficiencies and kinetic parameters than corresponding CdSe QD cells. In a preliminary study, a CdSe(Te) QD-sensitized TiO(2) film was combined with an organic hole conductor, spiro-OMeTAD, and shown to exhibit a promising efficiency of 1.6% at 100 W/m(2) in inorganic/organic hybrid all-solid-state cells.
Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/56ef50c9bd07807db3ce7ae5bf2fe05531e85e5d
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Citations in the corpus
- Recent progress and the status of dye-sensitised solar cell (DSSC) technology with state-of-the-art conversion efficiencies (2013, background): “73% [28] conversion efficiency compared to the traditional redox couples [22–24].”
- Quantum dot-sensitized solar cells—perspective and recent developments: A review of Cd chalcogenide quantum dots as sensitizers (2013, methodology): “Recent developments have seen the use of cobalt based electrolyte which promises high efficiency in QDSSCs [65,106,164,165].”