1,3-Diphenyl-5-(9-phenanthryl)-4,5-dihydro-1H-pyrazole (DPPhP): structure, properties, and application in organic light-emitting diodes
作者:C. Q. Ma、L. Q. Zhang、J. H. Zhou、X. S. Wang、B. W. Zhang、Y. Cao、P. Bugnon、M. Schaer、F. Nüesch、D. Q. Zhang、Y. Qiu
DOI:10.1039/b208130j
日期:——
A novel hole-transport material, 1,3-diphenyl-5-(9-phenanthryl)-4,5-dihydro-1H-pyrazole (DPPhP), was synthesized and fully characterized. The crystal structure of DPPhP was determined by X-ray diffraction analyses. DSC and AFM analysis demonstrate that DPPhP has a high Tg of 96 °C and good film forming ability. The hole-transport performance of DPPhP was examined by fabricating a multilayer device with structure of ITO/DPPhP (60 nm)/AlQ (60 nm)/LiF (0.8 nm)/Al, using DPPhP as the hole-transport layer along with an emitting-material, tris-(8-hydroxyquinolino)aluminium (AlQ). Both the brightness and efficiency of the device are about 30% higher than those of the device using N,N′-di-1-naphthenyl-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (α-NPD) as the hole-transport layer.
研究人员合成了一种新型空穴传输材料--1,3-二苯基-5-(9-菲基)-4,5-二氢-1H-吡唑(DPPhP),并对其进行了全面表征。通过 X 射线衍射分析确定了 DPPhP 的晶体结构。DSC 和原子力显微镜分析表明,DPPhP 具有 96 °C 的高 Tg 值和良好的成膜能力。通过制造一个具有 ITO/DPPhP (60 nm)/AlQ (60 nm)/LiF (0.8 nm)/Al 结构的多层器件,检验了 DPPhP 的空穴传输性能,该器件使用 DPPhP 作为空穴传输层,同时使用发光材料三(8-羟基喹啉)铝(AlQ)。该装置的亮度和效率都比使用 N,N′-二-1-萘基-N,N′-二苯基-1,1′-联苯-4,4′-二胺(α-NPD)作为空穴传输层的装置高出约 30%。