12‐1: Invited Paper: Narrowing the Emission Linewidth of I‐III‐VI Quantum Dots

Abstract

In recent years, I‐III‐VI semiconductor quantum dots (QDs) have shown significant improvements that have unlocked new capabilities and end markets. Some typical examples of I‐III‐VI QDs are CuAlS2 (blue), AgInS2 (green), CuInSe2 (red) CuInSe2 (near‐IR), but other compositions and alloys are possible. These materials exhibit tunable photoluminescence (PL) emissions, and can achieve near unity PL quantum yield. They can have efficient broad emission, but also can have narrow emission, large Stokes shifts, and high optical extinction coefficients. These materials are often more stable, safer, and lower cost than alternatives such as CdSe, InP, and PbS or PbSe QDs. In this work, we discuss industrialization and scale‐up of I‐III‐VI QDs, starting with critical end uses related to spectrum optimization for greenhouses and solar energy. We also update on recent progress narrowing the emission linewidth (full‐width at half maximum) of I‐III‐VI QDs to the point that they are becoming competitive with legacy QDs used in displays and lighting.