Highly efficient and low-cost top-emitting organic light-emitting diodes for monochromatic microdisplays

详细信息    查看全文

• 作者：Guohua Xie ; Qin Xue ; Ping Chen ; Chen Tao ; Chunmei Zhao ; Jianhua Lu ; Zhaoxin Gong ; Tianyu Zhang ; Ran Huang ; Huan Du ; Wenfa Xie ; Jingying Hou ; Yi Zhao ; Shiyong Liu
• 关键词：OLED microdisplay ; Low cost ; Electrical doping ; Trapping
• 刊名：Organic Electronics
• 出版年：2010
• 出版时间：March 2010
• 年：2010
• 卷：11
• 期：3
• 页码：407-411
• 全文大小：596 K

文摘

An efficient top-emitting organic light-emitting diode (TEOLED) achieving high luminance at very low voltage and enabling the integration of organic light-emitting diodes (OLEDs) with silicon-based driving circuits to realize high resolution and low power consumption OLED microdisplay is introduced. One of the key features is a p doped hole injecting layer (HIL) significantly reducing the driving voltage matching with that of silicon-based driving circuits without a high-voltage option. A well modulated interface is introduced to reduce the quenching of the excitons, and direct charge trapping effect in the emitter layer (EML) also play a role in balancing the charges in EML. We have demonstrated a TEOLED achieving a brightness of about 2500 cd/m² at 4 V and a maximum power efficiency of 28.8 lm/W at 1000 cd/m², which are ones of the best results of fluorescent emitters reported in literatures. Our OLED microdisplays without a high-voltage CMOS process show potentially low cost for commercial production.