کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1596600 1515715 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly efficient organic electroluminescent diodes realized by efficient charge balance with optimized electron and hole transport layers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Highly efficient organic electroluminescent diodes realized by efficient charge balance with optimized electron and hole transport layers
چکیده انگلیسی

Highly efficient organic electroluminescent devices (OLEDs) were developed based on 4,7-diphenyl-1, 10-phenanthroline (BPhen) as the electron transport layer (ETL), tris-(8-hydroxyquinoline) aluminum (Alq3) as the emission layer (EML) and N,Ń-bis-[1-naphthy(-N,Ńdiphenyl-1,1’-biphenyl-4,4’-diamine)] (NPB) as the hole transport layer (HTL). The typical device structure was glass substrate/ ITO/ NPB/ Alq3/ BPhen/ LiF/ Al. Since BPhen possesses a considerable high electron mobility of 5×10−4 cm2 V −1 s−1, devices with BPhen as ETL can realize an extremely high luminous efficiency. By optimizing the thickness of both HTL and ETL, we obtained a highly efficient OLED with a current efficiency of 6.80 cd/A and luminance of 1361 cd/m2 at a current density of 20 mA/cm2. This dramatic improvement in the current efficiency has been explained on the principle of charge balance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 144, Issues 7–8, November 2007, Pages 343–346
نویسندگان
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