The stability of colloidal quantum dot ligands in polymer photon multiplier nanocomposites
Photovoltaic (PV) technologies hold the potential to generate low-cost sustainable energy, however, their deployment en masse is currently hampered by their high cost / efficiency ratios. The biggest efficiency loss occurs due to the PVs inability to efficiently harvest the entire solar spectrum, where the absorption of high energy blue light results in energy losses due to thermalization. The photon-multiplier (PM) concept, in which a blue photon is converted into two red photons with efficiency that in principle can reach 100%, is a promising route to reducing such losses. A route for generating PM thin-films that could be easily interfaced with a solar cell involves dispersing singlet fission organic semiconductors and colloidal quantum dots (QD) within a polymer matrix. This experiment aims to gain new insight into the influence of polymer matrices on i) the quality of the QD dispersion and ii) the morphology of the QD ligand envelope. Due to the contrast provided by isotopic labelling (deuteration of the polymer matrix), SANS is an ideal technique to make this measurement.
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Michael P. Weir; JONES Richard A.L.; RAO Akshay; RYAN Anthony J.; SCHWEINS Ralf and Daniel T. W. Toolan. (2019). The stability of colloidal quantum dot ligands in polymer photon multiplier nanocomposites. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1914
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