Near-Infrared Light-Emitting Diodes Based on RoHS-Compliant InAs/ZnSe Colloidal Quantum Dots
Manuela De Franco, Dongxu Zhu, Aswin Asaithambi, Mirko Prato, Eleftheria Charalampous, Sotirios Christodoulou, Ilka Kriegel, Luca De Trizio, Liberato Manna, Houman Bahmani Jalali, Francesco Di Stasio
Abstract
We demonstrate efficient, stable, and fully RoHS-compliant near-infrared (NIR) light-emitting diodes (LEDs) based on InAs/ZnSe quantum dots (QDs) synthesized by employing a commercially available amino-As precursor. They have a record external quantum efficiency of 5.5% at 947 nm and an operational lifetime of ∼32 h before reaching 50% of their initial luminance. Our findings offer a new solution for developing RoHS-compliant light-emitting technologies based on Pb-free colloidal QDs.
Topics & Concepts
Light-emitting diodeQuantum dotOptoelectronicsMaterials scienceDiodeInfraredNanotechnologyColloidOpticsChemical engineeringPhysicsEngineeringQuantum Dots Synthesis And PropertiesPerovskite Materials and ApplicationsChalcogenide Semiconductor Thin Films