NM12.03.03 : Near-Unity Quantum Yield CuInS2/ZnS Quantum Dots

5:00 PM–7:00 PM Apr 3, 2018 (America - Denver)

PCC North, 300 Level, Exhibit Hall C-E

Nicolai Archuleta1 Matt Bergren1 Nikolay Makarov1 Hunter McDaniel1 Karthik Ramasamy1

1, UBIQD, Los Alamos, New Mexico, United States

CuInS2/ZnS quantum dots (QDs) have the potential to be disruptive in the emerging QD industry owing to their wide-range tunable bright emission from visible to near-infrared spectrum, lack of toxic heavy elements, air and moisture stability, and scalable low-cost manufacturing process. UbiQD, a New Mexico-based quantum dot manufacturer spun out from Los Alamos National Lab, has achieved greater than 85% quantum yield, or optical efficiency, for its quantum dots over most of its accessible spectrum from the visible to the near infra-red (550 nm to 1100 nm peak emission). The company also manufactures QDs with peak emissions further into the near infra-red (out to ~1300 nm), but typically with QYs ~ 60%. For some colors between orange (600 nm) and NIR (1000 nm), the company manufactured optimized quantum dots with near 100% quantum yield.

With this milestone, UbiQD's materials now have the highest reported photon conversion efficiency for quantum dots that do not contain cadmium, an element known for its toxicity and which is widely used by many quantum dot manufacturers. At the same time, the quantum yields reported by the company are also comparable to the best cadmium-containing nanomaterials that currently exist. The benefit of high quantum yield positively impacts all quantum dot applications including lighting, displays, security, biotechnology, and design. While there are many potential markets for UbiQD's patented technology, the company's primary focus is enabling windows to generate electricity using products known as luminescent solar concentrators.

This poster presentation will describe results from our QD optimization and scale-up efforts, together with an overview of the markets enabled by high performance QDs.