دوره 7، شماره 1 - ( 3-1392 )                   جلد 7 شماره 1 صفحات 18-11 | برگشت به فهرست نسخه ها

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Ghoshani M, Behjat A, Jafari F, torabi N. Thin-film Encapsulation of Organic Light-Emitting Diodes Using Single and Multilayer Structures of MgF2, YF3 and ZnS. IJOP. 2013; 7 (1) :11-18
URL: http://ijop.ir/article-1-124-fa.html
Thin-film Encapsulation of Organic Light-Emitting Diodes Using Single and Multilayer Structures of MgF2, YF3 and ZnS. . 1392; 7 (1) :18-11

URL: http://ijop.ir/article-1-124-fa.html


چکیده:   (17614 مشاهده)

In this research, the lifetime of green organic light emitting diodes (OLEDs) is studied using four passivation layers. To encapsulate the OLEDs, MgF2, YF3, composed of alternating MgF2/ZnS and YF3/ZnS layers were grown by thermal vacuum deposition. Measurements show that the device lifetime is significantly improved by using YF3 and ZnS as passivation layers. However, diodes encapsulated by MgF2/ZnS and YF3/ZnS nano-structures show a highly efficient gas diffusion barrier that results in a longer lifetime of the devices. The half lifetime of the green OLEDs reached 1200 minutes using YF3/ZnS layers. The electroluminescence (EL) and current-voltage characteristics of the devices were also examined to compare the electrical and the emissivity properties of the devices before and after encapsulation. This simple and inexpensive thin-film encapsulation method would be potentially employed to capsulate top emitting OLEDs and flexible OLEDs due to their good performance and easy fabrication.

     
نوع مطالعه: پژوهشي | موضوع مقاله: عمومى
دریافت: 1392/4/5 | ویرایش نهایی: 1393/12/5 | پذیرش: 1392/8/15 | انتشار: 1392/12/21

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