An organic p-n junction as an efficient and cathode independent electron injection layer for flexible inverted organic light emitting diodes

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• 作者：Jeong-Hwan Lee ; Ji Whan Kim ; Sei-Yong Kim ; Seung-Jun Yoo ; Jae-Hyun Lee ; Jang-Joo Kim ; ^{jjkim@snu.ac.kr}
• 关键词：Organic p&ndash ; n junction ; Electrode independent electron injection ; Inverted organic light emitting diode ; Flexible electronics
• 刊名：Organic Electronics
• 出版年：2012
• 期刊代码：137_15661199
• 类别：et
• 出版时间：April, 2012
• 卷：13
• 期：4
• 页码：545-549
• 文件大小：776 K

摘要

We demonstrate an organic p-n junction as an efficient electron injection layer for green inverted bottom-emission organic light emitting diodes (IBOLEDs). The organic p-n junction composed of a p-CuPc/n-Bphen layer showed very efficient charge generation under a reverse bias reaching to 100 mA/cm² at 0.3 V, and efficient electron injection from indium tin oxide (ITO) when adopted in IBOLEDs. Moreover, the organic p-n junction resulted in the same current density-voltage-luminance characteristics independent of the work function of the cathode, which is a valuable advantage for flexible displays.