Buffer-modified C60/pentacene as organic charge generation layer based on AI and MoO3

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2018,（4）
• 页码范围: 286-290
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11801-018-7275-y

摘要

We demonstrate tandem organic light-emitting diodes (TOLEDs) with excellent performance using Al and MoO3 buffer-modified C6o/pentacene as charge generation layer (CGL).Al and MoO3 were used as the electron and hole injection layers of C60/pentacene CGL,respectively.Green phosphorescence TOLEDs with the structure of ITO/NPB/mCP:Ir(Ppy)3/TPBi/Al/C6o/pentacene/MoO3/NPB/mCP:Ir(ppy)3/TPBi/Cs2CO3/Al were fabricated.The resuits show that the inserted Al and MoO3 can effectively increase the charge injection capacity of organic CGL,resuiting the improvement of luminance and current efficiency of TOLEDs.The turn-on voltage of TOLEDs is much lower than that of single-unit device,and the current efficiency is more than 2 times larger than that of the single-unit device.TOLEDs can exhibit excellent photoelectric performance when the thicknesses of Al,C60,pentacene and MoO3 are 3 nm,15 nm,25 nm and 1 nm,respectively.The maximum luminance and current efficiency are 7 920.0 cd/m2 and 16.4cd/A,respectively.This work is significant to build new CGL structures for realizing high-performance TOLEDs.