Journal ArticleDOI
Organic electroluminescent devices with improved stability
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TLDR
In this article, a stable organic electroluminescent devices based on vapor-deposited Alq thin films have been achieved, which are derived from several factors including: (1) a multilayer thin-film structure with a CuPc stabilized hole-injection contact, (2) a hole-transport diamine layer using a naphthyl substituted benzidine derivative, and (3) an ac drive wave form.Abstract:
Highly stable organic electroluminescent devices based on vapor‐deposited Alq thin films have been achieved. The improvement in stability is derived from several factors including: (1) a multilayer thin‐film structure with a CuPc stabilized hole‐injection contact, (2) a hole‐transport diamine layer using a naphthyl‐substituted benzidine derivative, and (3) an ac drive wave form. These emissive devices have shown an operational half‐lifetime of about 4000 h from an initial luminance of 510 cd/m2.read more
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Spectroscopic ellipsometry on a novel cyanine dyes in Langmuir–Blodgett multilayers
TL;DR: In this article, a spectroscopic ellipsometer (SE) was used to measure the refractive index of cyanine dye in Langmuir-Blodgett (LB) films.
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Journal ArticleDOI
Evolution of luminance by voltage in organic light-emitting diodes
TL;DR: In this article, the degradation behavior of luminance and voltage in organic light-emitting diodes was studied and it was shown that luminance decay is faster at higher initial luminance, where δ(t) indicates a decay exponent.
Journal ArticleDOI
Synthesis and Characterization of New Anthracene-Based Blue Host Material
Ki Ho So,Hyuntae Park,Sung Chul Shin,Sang-Gyeong Lee,Dong Hui Lee,Kyeong-Hoon Lee,Hyeong-Yun Oh,Soon-Ki Kwon,Yun-Hi Kim +8 more
TL;DR: In this paper, a new anthracene-based host material, 9,10-bis(2,4-dimethylphenyl)anthracene (BDA), was designed to increase color purity as well as device efficiency.