Co-oxide quantum dots by microplasma (Green Chem 20, 2018, 2101)

Plasma at the gas/liquid interface can promote a complex mixture of reactions in solution and microplasma-assisted direct-current anodic oxidation is an efficient and green process in synthesising nanoscale materials for various applications. In this study, we demonstrated the direct synthesis of crystalline Co3O4 quantum dots, ca. 2–5 nm in diameter, by the direct anodization of Co foil with charge balanced by the microplasma at the flowing-helium/pure-ethanol interface under ambient conditions.(Green Chemistry 20, 2018, 2101).

Type-I solar cells (Nano Energy 50, 2018, 245-255)

Devices with Type-I alignment represent a novel photovoltaic architecture. A type-I alignment leads to the possibility of enhanced carrier extraction and in general synergies between the respective materials qualities (e.g. carrier multiplication for Si NCs and exceptional transport for perovskites). The atypical band alignment forming a type-I heterojunction has not been predominantly utilized and is believed to represent a novel approach to the wider family of QD solar cell device architectures.(Nano Energy 50, 2018, 245–255).

Solar cells with SiSn nanocrystals (Materials Today Energy 7, 2018, 87)

Silicon-tin alloy nanocrystals with quantum confinement effect for photovoltaics. Synthetized nanoparticles with average of 3 nm in diameter and optical bandgap of 0.81 eV at room temperature were obtained with a Si (0.88)/Sn (0.12) alloyed composition that corresponds to a ratio of about eight Si atoms for every Sn atom. The potential of silicon-tin nanocrystals as a photovoltaic material is assessed and an enhancement of the solar cells performance is demonstrated due to the extended spectral range and increased absorption. (Materials Today Energy 7, 2018, 87).

MABI & silicon nanocrystals (Nanoscale, 2017, 9, 18759)

Zero-dimensional methylammonium iodo bismuthate (MABI) can accommodate
silicon nanocrystals
, leading to solar cells with an enhancement in the short-circuit current. Through the material MABI, we demonstrate a promising alternative to the organometal trihalide perovskite class and present a model material for future composite third-generation photovoltaics. (Nanoscale, 2017, 9, 18759).

Transport layer with ultra-small CuO nanoparticles (Plasma Process Polym 14, 2017, 1600224)

CuO is a versatile p-type material for energy applications capable of imparting diverse functionalities by manipulating its band-energy diagram. CuO nanoparticles films have been used for the first time in all-inorganic third generation solar cell devices demonstrating highly effective functionalities as blocking layer (Plasma Process Polym 14, 2017, 1600224).

Charge carrier localised in MABI clusters (Nature Communications 8, 2017, 170)

Nanoclusters in organic-inorganic hybrid bismuth halide can be used for the splitting of a high-energy photons and this could bring advances in solar cells as they are arranged in a bulk crystalline material that can be processed from solution. The generation of two low-energy photons from a high-energy one has been observed in quantum dots and lanthanide ions due to the confinement of excitons and the transport of charge carriers from neighbouring ones (Nature Communications 8, 2017, 170).

Environmentally friendly quantum dots for next generation solar cells (Sust. Energy Fuels 1, 2017, 1611)

Shine on you crazy carbon! Nitrogen-doped carbon quantum dots (N-CQDs) are synthesized using a simple custom atmospheric pressure microplasma. The N-CQDs show interesting quantum confined optical properties that depend on the amount of nitrogen incorporation. The N-CQDs are incorporated into a photovoltaic device as the photoactive layer achieving an extraordinary open-circuit voltage of 1.8 V and a power conversion efficiency of 0.8% (champion device), amongst the highest reported to date for group IV and carbon based quantum dots (Sustainable Energy Fuels 1, 2017, 1611).