Quantum Dot Sensitized Solar Cells Thesis No Homework Passes
To address the issue of improving overall PCE values in QDSSCs, new strategies such as Forster resonance energy transfer or FRET, plasmonic effects, and blending the photosensitizer dots with carbon nanostructures etc., were implemented in this thesis.Since photovoltaic performance parameters are closely linked to the energetics of the components which, in turn dictates electron transfer dynamics, in this work, we fabricated hitherto unexplored photoanode architectures and charge transfer and transport mechanisms were studied by detailed fluorescence quenching, and lifetime analyses.Colloidal nanocrystals or quantum dots (QDs) have attained immense scientific interest as light sensitive materials due to band gap tunability by size control, ease of preparation, multiple exciton generation and low cost.
There have been previous studies focusing on the components such as electrode, sensitiser, counter-electrode, and limited studies on electrolyte.
• What are the optimal reduced and oxidised species concentrations in a ferrocyanide/ferricyanide electrolyte to maximise the performance of a Cd S QDSSC?
• Which parameters in the diode model of the Cd S QDSSC cell have the most influence on cell performance with this redox electrolyte and which among these parameters are sensitive to tolerance changes?
Because of this minuteness the QD's optical and electronic properties differ from those of its bulk material's properties, such that it will absorb/emit light usually from the visible to infrared wavelength in the solar spectrum.
In addition, these properties can be controlled by tuning the parameters during synthesis, opening up a number of applications in biotechnology, electronics, photovoltaics, and quantum computing.