期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 23, 页码 14725-14731出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b01639
关键词
graphene; flexible lamination encapsulation; polymer light emitting diodes (PLED); lifetime; water vapor transmission rate (WVTR)
资金
- National Research Foundation of Korea (NRF) - Korea government [NRF-2013R1A2A2A01068753]
- Ministry of Science, ICT and Future Planning (MSIP), Korea, under the IT Consilience Creative Program [IITP-2015-R0346-15-1007]
We introduce a simple, inexpensive, and large area flexible transparent lamination encapsulation method that uses graphene films with polydimethylsiloxane (PDMS) buffer on polyethylene terephthalate (PET) substrate. The number Of stacked graphene layers (n(G)) was increased from 2 to 6, and 6-layered graphene-encapsulation showed high impermeability to moisture and air. The graphene-encapsulated polymer light emitting diodes (PLEDs) had stable operating characteristics; and the operational lifetime of encapsulated PLEDs increased as nG increased. Calcium oxidation test data confirmed the improved impermeability of graphene-encapsulation with increased nG. As a practical application, we demonstrated large-area flexible organic light emitting diodes (FOLEDs) and transparent FOLEDs that were encapsulated by our polymer/graphene encapsillant.
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