The Study of High Contrast Display Devices
Date Issued
2009
Date
2009
Author(s)
Chiu, Tien-Lung
Abstract
In this thesis, two kinds of high contrast display devices were demonstrated. One is an organic light-emitting device (OLED) with absorptive and destructive interference black cathode (ADIBC) structure. The other is a hybrid device vertically integrated with a reflective liquid crystal display (RLCD) and a transparent OLED in one unit cell.he novel ADIBC-OLED constructed with a destructive interference cavity filled with a highly absorptive and conductively thin-film which was fabricated by doping Ag into N,N''-Bis (2,6-diisopropylphenyl)-1,7-bis (4-methoxy-phenyl) perylene-3,4,9,10 -tetracarboxydiimide (MPPDI). Strong absorption and high conduction of thin-film resulted from plasmon-enhanced absorption and electrical properties improvement of Ag nanoparticles. Reflection from the ADIBC-OLED is as low as 4% at 800 nm, and 5.5% at 550 nm. Besides, low reflection was also achieved at oblique viewing angles (12.3% at 550 nm with 60o) with good image quality under outdoor environments. Such a ADIBC-OLED exhibited a nearly identical J-V and lifetime performances to the control device.abrication and integration issues of the transflective (TR-) hybrid device consisting of a reflective LCD and an OLED were addressed and solved. With suitable design of the process flow, electrical and optical characteristics of the OLED were not affected by the following LCD processes. Storage lifetime of this TR-hybrid device was even longer than that of the control one because of the passivation effect of the LC materials.
Subjects
organic light emitted diode
low reflection
absorption
Type
thesis
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