Release Time:2019-03-13  Hits:

Indexed by: Journal Article

Date of Publication: 2016-05-01

Journal: CHINESE CHEMICAL LETTERS

Included Journals: ISTIC、SCIE

Volume: 27

Issue: 5

Page Number: 764-768

ISSN: 1001-8417

Key Words: Solvothermal synthesis; H2Pc single crystal; Optical properties; Near-infrared; Electroluminescence

Abstract: A metal-free purple H2Pc single crystal was synthesized by a facile solvothermal method, and its solubility and near-infrared (NIR) optical properties were also investigated due to its potential applications as a light-emitting layer for OLEDs. The H2Pc single crystal is insoluble in 1-chlorine naphthalene and other organic solvents. It gives a wide absorption in the range from 620 nm to 679 nm and a wide emission in near 922 nm. As an active light-emitting layer, H2Pc was employed to fabricate electroluminescent (EL) devices with a structure of ITO/NPB (30 nm)/Alq(3):H2Pc (30 nm)/BCP (20 nm)/Alq(3) (20 nm)/Al. The emission center is at 936 nm when the H2Pc doping concentration is 20 wt%. The doping concentration strongly governs the emission intensity. When doping concentration decreases from 10 wt% to 1 wt%, the emission intensity remarkably fades, and simultaneously the emission center undergoes a blue shift. (C) 2016 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.