Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 34, Issue 5, Pages 740-743Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/34/5/312
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The encapsulation effect of thermal chemical-vapour-deposition polymer films (TCVDPF) has been studied for organic light-emitting diodes (OLED). We used poly-p-xylylene (PPX) and/or poly-2-chloro-p-xylylene (PCPX) films as TCVDPE For the encapsulation, TCVDPF was deposited on the OLED during a dry process at room temperature. The lifetime of an encapsulated OLED with 0.6 mum thick TCVDPF was about four times longer than that of a non-encapsulated OLED in air. The lifetime of the OLED increased with increasing thickness of the TCVDPE We conclude that the effect of TCVDPF encapsulation on the long-term stability of the OLED is due to the prevention of oxygen and moisture in air and several other factors.
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