Abé, Sofie

Hens, Zeger

Smet, Philippe

English

Ghent University Academic Bibliography

APPLICATIONS OF COLLOIDAL NANOCRYSTALS  ABSORBER MATERIAL FOR SOLAR CELLS NANO = ALSO DIFFERENT Physical properties of a piece of metal or semiconductor of                    5 g and 5 kg =   the same      2 nm³ and 5 nm³ =   different from bulk ánd each other  QUANTUM DOTS ARE LUMINESCENT ABSORBER MATERIAL FOR PHOTODETECTORS NANO = SMALL WHITE LED COLOUR CONVERTOR FLUORESCENT BIOLABELS Part of the blue LED light needs to be converted to yellow (+ some red) to obtain (warm) white light.  white LED     =       blue LED        +     colour convertor Cheap and performant photodetectors  in the mid-IR range are needed. Colloidal semiconductor nanocrystals  – quantum dots – absorb photons  in a wide wavelength range and  emit photons with lower energy.  The emission wavelength  can be tuned by adjusting  the quantum dot diameter.  With one type of material (CdSe,  PbS, InP, CuInS2,…), conversion  to different colours – or even IR –  can be achieved.   Device fabrication requires patterning of QD layers. quantum dot                   linker                 target (protein) Sofie Abé Ι Philippe F. Smet Ι Zeger Hens White LEDs for lighting or displays require a proper combination of yellow, red and/or green colour convertors: quantum dots, phosphors or a combination of both. Semiconductor layers in solar cells absorb sunlight  and convert it to electricity, creating green energy. Absorbance        ambient light                                        UV light decreasing quantum dot size nanometers     synthesis = well controlled        tunable emission colour, broad absorption range  easy solution-based processing  can be combined with different technology platforms motivation TCO CdS    CIGS   Mo  glass, metal foil or plastics  Colloidal nanocrystals (CIGS) form a stable ink which can  be printed on any surface before annealing to bulk CIGS.     Emission In vivo imaging of cells and organisms with fluorescence microscopy requires stable luminescent labels that attach to specific cell organelles, cells, tissues or organs.         Quantum dots can be linked to target proteins, antigens  or other functional molecules (drugs etc.)  and allow simultaneous imaging of multiple targets  due to their narrow emission (multiplexing). image constructed with fluorescence microscope 

Applications of colloidal nanocrystals

https://biblio.ugent.be/publication/5664929/file/5665361

Applications of colloidal nanocrystals

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Ghent University Academic Bibliography