کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1669267 | 1008881 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Low-cost and reliable thin film encapsulation for organic light emitting diodes using magnesium fluoride and zinc sulfide Low-cost and reliable thin film encapsulation for organic light emitting diodes using magnesium fluoride and zinc sulfide](/preview/png/1669267.png)
We report highly efficient gas diffusion barriers for organic light emitting diodes (OLEDs) with an encapsulation structure composed of alternating magnesium fluoride (MgF2) and zinc sulfide (ZnS) layers grown by vacuum thermal deposition. The half lifetime of yellow OLEDs under an initial luminance of 2000 cd/m2 with rubrene as an emitter reached 245 h using three pairs of MgF2/ZnS layers. The device lifetime was obviously improved using MgF2 and ZnS as passivation layers before UV-cured epoxy seal without desiccant with the lifetime for the initial luminance dropping to 56% being over 500 h. This simple and inexpensive encapsulation method can potentially be applied to top-emitting OLEDs due to good light transmission characteristic of the passivation film.
Journal: Thin Solid Films - Volume 519, Issue 7, 31 January 2011, Pages 2344–2348