Light-emitting devices using thin film electrode with refractive index optimized capping layer for reduction of plasmonic energy loss

US9722208B2 · kind B2 · utility

Assignee

• KONICA MINOLTA LABORATORY U.S.A., INC. · US

Inventor

• Leiming Wang · Beijing, CN

Key dates

• Filing date: Dec 30, 2015
• Grant date: Aug 1, 2017
• Expiry date: Dec 30, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/351

Abstract

A light emitting device includes a substrate, a first electrode disposed on the substrate, a light emission layer (EML) disposed on the first electrode, a second electrode disposed on the EML, and a capping layer disposed on the second electrode. A thickness of the second electrode is not more than 50 nm, a refractive index of the capping layer is less than a refractive index of the EML, and the EML and the second electrode are separated by a distance not more than 100 nm.