Fabrication of current thin film solar cell technology involves costly evaporation techniques, which is hindering their mass market adoption. Nanoco, in response to the demand for new and alternative solar technologies has developed a range of CIGS and CIS (copper indium gallium diselenide, copper indium diselenide) nanocrystals or quantum dots (QDs) for use in next generation thin film solar cells that can be fabricated using conventional printing techniques.
Nanoco’s CIGS and CIS PV-QDs are unique among nano-materials developed for PV applications in that they are synthesised from the ‘ground up’, which provides materials possessing the desired elemental ratios or stoichiometry, which can be adjusted to meet specific needs. Our PV-QDs are highly crystalline, mono-dispersed (5.0 nm) particles, which absorb light up to 800 nm and our PV-QDs are unique in that they are capped with an organic ‘capping agent’ or ‘ligand’.
Right: The PL/Absorption Spectra of Nanoco’s CuInSe2 PV-QDs.
Because of the unique manner in which Nanoco’s PV-QDs are synthesised, they can be printed onto a substrate using a wide range of well understood printing techniques, even in roll-to-roll processes. Once printed, the PV-QDs are heated to remove the organic capping agent, which destroys the quantum confinement associated with the QDs and provides for a p-type semiconductor film possessing the desired crystalline structure.