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Contrast and efficiency enhancement in organic light-emitting devices utilizing high absorption and high charge mobility organic layers.

Optics express (2006-08-21)
W F Xie, Y Zhao, C N Li, S Y Liu
ABSTRACT

Organic light-emitting devices utilizing copper phthalocyanine (CuPc) and C(60) as the hole- and electron-injection layers were reported. Compared with a conventional device without CuPc and C(60) layers, the improvement of the contrast is more than 100% under 140-lx ambient lighting at a brightness of 300 cd/m(2). A maximum current efficiency of 3.93 cd/A, which is higher than 3.62 cd/A for a conventional device, was obtained at 9 V. The device has a maximum luminance of 17170 cd/m(2) at 15 V. The high contrast and high efficiency of the device are attributed to the high absorption and high charge mobility of CuPc and C(60) films.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Copper(II) phthalocyanine, β-form, Dye content 90 %
Sigma-Aldrich
Copper(II) phthalocyanine, sublimed grade, Dye content 99 %
Sigma-Aldrich
Copper(II) phthalocyanine, Dye content >99 %
Sigma-Aldrich
Copper(II) phthalocyanine, triple-sublimed grade, >99.95% trace metals basis
Sigma-Aldrich
Fullerene-C60, sublimed, 99.9%
Sigma-Aldrich
Fullerene-C60, 99.5%
Sigma-Aldrich
Fullerene-C60, 98%