Dual near infrared emission in Ag2Se quantum dots via Pb doping for broadband mini light-emitting diodes

Abstract

Dual emission almost covering the entire NIR-II region with the maximum full width at half maximum of 542 nm was achieved by doping small amounts of Pb ions into Ag₂Se quantum dots, which to the best of our knowledge has not been realized for continuous tunable dual NIR emission in Ag-based QDs. The fabricated broadband NIR mini light-emitting diodes based on the Pb-doped Ag₂Se QDs exhibit potential applications for highly sensitive and multispectral non-invasive imaging and NIR lighting.