Laminated Graphene Films for Flexible Transparent Thin Film Encapsulation
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- 作者：Hong-Kyu Seo ; Min-Ho Park ; Young-Hoon Kim ; Sung-Joo Kwon ; Su-Hun Jeong ; Tae-Woo Lee
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2016
- 出版时间：June 15, 2016
- 年：2016
- 卷：8
- 期：23
- 页码：14725-14731
- 全文大小：433K
- 年卷期：0
- ISSN：1944-8252
文摘
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 (nG) 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 encapsulant.