کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1664712 | 1518018 | 2015 | 5 صفحه PDF | دانلود رایگان |
• Highly efficient blue phosphorescent organic light-emitting diode (PHOLEDs)
• Hole transporting layer consists with mixed layer for delayed hole injection
• The blue PHOLEDs with long lifetime due to suppression of quenching process
The authors have demonstrated a highly efficient and long-lifetime blue phosphorescent organic light emitting diode (PHOLED) that uses two types of mixed layers. The mixed layers play the role of carrier injection control and exciton generation zone extension. One of the layers is applied for mixing the hole transport layer (HTL) and host material at the HTL side for carrier injection control. The other works as a mixed electron transporting layer (ETL) and host material at the ETL side. The optimized blue PHOLED has been shown to achieve high performance owing to the mixed layer effects. It gave a maximum luminous efficiency of 25.55 cd/A, maximum external quantum efficiency of 13.05%, and lifetime of 7.24 h under 500 cd/m2. These results indicate that applying mixed layers is a simple and efficient method that does not require significant structural change.
Journal: Thin Solid Films - Volume 587, 31 July 2015, Pages 61–65