Experimental and theoretical investigation of 2D nanoplatelet-based conversion layers for color LED microdisplays

• DOI: 10.1364/oe.425907
• Publication Date: 2021-05-24T10:00:08Z
• Authors: E. Quesnel; A. Suhm; M. Consonni; M. Reymermier; G. Lorin; C. Laugier; M. Tournaire; P. Le Maitre; A. Lagrange; B. Racine; M. D’Amico; E. Cao
• Keywords: Photoresist; Quantum Efficiency; LED lamp

In the field of augmented reality, there is a need for very bright color microdisplays to meet user specifications. Today, one most promising technology manufacture such displays involves blue micro-LED and quantum dots-based conversion layers. Despite recent progress, external power efficiencies (EPCE) these layers remain under ∼25%, below needs (>40%) reach white luminance 100,000 cd/m 2 . this work, we have synthesized CdSe x S 1-x nanoplatelet-based red green conversion, measured their absorption properties EPCE performances with respect layer thickness. On basis, model was developed that reliably predicts while using only few input data, namely coefficients photoluminescence yield (PLQY) photoresist. It brings new insight into process at play level provides simple method extensive optimization materials. Finally, study highlights outstanding efficiency photoresist made core-double shell nanoplatelets 31% (45% PLQY) 8 µm-thick layer.