Title :
Improve efficiency by surface treatment of top-emission flexible polymer light-emitting diode
Author :
Ming-Lung Tu ; Yan-Kuin Su ; Ruei-Tang Chen ; Shin-Her Yu
Author_Institution :
Dept. of Electron. Eng., Fortune Inst. of Technol., Kaohsiung, Taiwan
Abstract :
A yellow flexible top-emission polymer light-emitting diode (TOPLED) was fabricated on cyclic olefin copolymer (COC) substrate. The light-emitting material was phenyl-substituted (p-phenylene vinylene) (HYPPV) polymer. The structure of TOPLED was COC/Ag/PEDOT:PSS/HYPPV/Ca/Ag. The Ag on COC was used as anode and the Ag on Ca was used as cathode. After anode Ag was thermally evaporated on COC substrate, the ultraviolet-ozone (UV-ozone) was treated on surface of anode Ag. The treating time was varied. The optimal treated time was 3 minutes. The luminous efficiency of TOPLED increased 42% with 3 minutes UV-ozone treatment.
Keywords :
anodes; calcium; cathodes; flexible electronics; light emitting diodes; ozonation (materials processing); polymer blends; silver; surface treatment; COC substrate; Ca-Ag; TOPLED; UV-ozone treatment; cyclic olefin copolymer substrate; light-emitting material; luminous efficiency; phenyl-substituted (p-phenylene vinylene) (HYPPV) polymer; surface treatment; time 3 min; ultraviolet-ozone; yellow flexible top-emission polymer light-emitting diode; Anodes; Cathodes; Cities and towns; Light emitting diodes; Polymers; Substrates; Surface treatment; efficiency; light-emitting diode; optical polymer;
Conference_Titel :
Next-Generation Electronics (ISNE), 2015 International Symposium on
Conference_Location :
Taipei
DOI :
10.1109/ISNE.2015.7131974
