By Topic

Near-infrared organic light emitting diodes based on heavy metal phthalocyanines

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
3 Author(s)
Rosenow, Thomas Conrad ; Institut für Angewandte Photophysik, Technische Universität Dresden, D-01062 Dresden, Germany ; Walzer, Karsten ; Leo, Karl

Your organization might have access to this article on the publisher's site. To check, click on this link: 

We demonstrate near-infrared (NIR) organic light-emitting diodes containing the phthalocyanines of copper (CuPc), palladium (PdPc), and platinum (PtPc) as emitting material. The devices show NIR emission from the triplet excitonic states of those phthalocyanines at 1095, 1025, and 966 nm, respectively. A yellow singlet emitter serves as host for the emitter materials, reducing triplet exciton quenching and improving energy transfer to the emitter. Using the emitter PtPc as guest and the yellow singlet emitter as host, an external quantum efficiency of 0.3% is achieved for infrared light emission at 966 nm. Due to the use of electrically doped charge transport layers, operation at voltages significantly below 3 V is possible. Light output reaches 80 μW/cm2 at a current density of 140 mA/cm2.

Published in:

Journal of Applied Physics  (Volume:103 ,  Issue: 4 )