| Summary: | 碩士 === 國立中山大學 === 電機工程學系研究所 === 93 === Organic light-emitting diode has several advantages using in
the flat penal display, but it is still needed to improve the disadvantages. The charge-carriers of the organic layers are one of the dominant factors to influence the performance of OLED.
Hence, it is worth to study and understand the charge
transporting behaviors by the theoretical simulation in the
organic layers of OLED, and that is helpful for the OLED in
future.
In this study, three kinds of models are used to simulate the
characteristics of several different organic light-emitting devices,
and it also try to compare the relationship between the current
density and voltage. Three kinds of models are described as (1)
The field-dependent carrier mobility model (FDM model), (2) An
exponential distribution of traps model (EDT model), and (3) The
field dependent trap occupancy model (FDTO model). For the
simulation of three models, the characteristics of several
hole-only devices and electron-only devices were analyzed to
investigate and discuss the organic layer of the devices with different materials. In addition, by varying the parameters such as the thickness and temperature, a comparison was made between the results simulated from models with the values obtained from experimental works. Finally, based on above results, the characteristics of OLED could be improved for future applications.
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