High Efficiency and White Light Organic Polymer Light-Emitting Device
Date Issued
2005
Date
2005
Author(s)
Peng, Kang-Chun
DOI
en-US
Abstract
In this thesis, we use triton to modify PEDOT:PSS which is used as the hole injection in our PLED device. Because triton is a kind of interface active solvent, it can improve the adhesion of the interface, and make PEDOT and PSS disperse uniformly in water solution. That can raise the conductivity and help hole-injection capability to improve device efficiency. Then we use a new light-emitting material (P1) as the emitting layer in PLEDs. To improve device performance, we use BCP as the hole blocking layer, Alq3 as the electron transport layer and the new polymer material (OPV-IPDI) as the hole transport layer, which can improve the efficiency by six times compared to the control device Furthermore, we apply PEDOT:PSS, OPV-IPDI and its derivatives (OPV-OXD, OXD-IPDI, and OPV-Si) as the hole injection and transport layers respectively in small molecule OLEDs. Compared with the conventioanl hole transport material, we demonstrate our new hole transport materials (OPV-IPDI and OPV-OXD) can effectively reduce the driving voltage by 2V and improve the current efficiency more than twice.
On the other hand, by using a simple spin-coating process, we spin polymer luminescent material MEHPPV on the emitting side of the high efficiency blue small molecule OLED. Based on luminescence conversion mechanism, we successfully fabricate a pure white light (0.323, 0.329) device based on a high efficiency blue small molecule OLED. The white light device has color rendering index of 71.1 and the luminous efficiency of 10.1 lm/W at 10 mA/cm2.
Subjects
有機
發光
白光
organic
light
emitting
white light
polymer
Type
thesis
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