Science Daily November 1, 2022
It is possible to accurately design the electronic properties of quantum dots just by changing their size. However, to create functional devices, many dots have to be combined into a new material. During this process, the properties of the dots are often lost. Researchers in the Netherlands have made a highly conductive optoelectronic metamaterial through controlled ordering of colloidal quantum dots in three dimensions and over large areas achieving outstanding transport properties. The measured electron mobilities are the highest ever reported for a self-assembled solid of fully quantum-confined objects. This ultimately demonstrated that optoelectronic metamaterials with highly tunable optical properties (in this case in the short-wavelength infrared spectral range) and charge mobilities approaching the one of bulk semiconductor can be obtained. The finding paves the way towards a new generation of optoelectronic devices…read more. TECHNICAL ARTICLE
Colloidal quantum dots with truncated cube shape and their original ligands… Credit: Credit: Arjen Kamp, Majid Ahmadi & Jacopo Pinna / University of Groningen