One might then be tempted to assume that QDs are now a stagnant technology with slow and unchanging commercial prospects. This assumption would however be very wrong.
Largely inspired from the IDTechEx Research report "Quantum Dot Materials and Technologies 2018-2028: Trends, Markets, Players", this article sets out to make this point, demonstrating that QDs have now entered a time of growth, and crucially, rapid technological change.
Quantum dots: transitions so far from the past to present
QDs' first success beyond research uses came in the display industry. Here, first high-performance Cd-based QDs were adopted in LCDs either in edge-optic or film-type implementations. The industry however has already evolved beyond that status: the edge optic has largely become obsolete since its main proponent sold its patent portfolio after IP litigations, whilst the industry has already transitioned away from Cd based towards Cd-free/less QDs with the latter expected to reach 80% market share in 2018. Note that this transition in material composition was driven largely by legislatures who finally announced a ban (effective Oct 2019) on toxic cadmium.
The transition however still comes at a performance penalty: the alternative InP QDs still suffers from a wider emission band (FWHM) whilst having largely bridged the quantum yield (QY) discrepancy. Today, CdSe already achieves 35nm and <20nm in commercial and laboratory settings, respectively; whereas InP QDs are at c. 40nm commercially but struggle to go to 35nm even in labs.