All Solution-Processed Red Phosphorescent Organic Light-Emitting Diodes Using Cross-Linkable Complexes
발표자
()
초록
내용
A novel hole transport material (HTM) was designed and synthesized for the fabrication of solution-processed phosphorescent organic light-emitting diodes (PHOLEDs). The newly cross-linkable HTM was successfully thermal cross-linked with cross-linkable host and dopant in emitting layer (EML). After cross-linking, EML was not damaged by the organic solvent. The photophysical, and electrochemical properties of the cross-linkable HTM was systematically investigated by UV-visible, PL spectra, cyclic voltammetry, TGA and DSC. In addition, the red PHOLEDs were fabricated with the configuration of ITO/PEDOT:PSS/X-HTM/EML/TPBi/LiF/Al. A maximum external quantum efficiency (EQE) of 4.62% (2.26 cd/A) was achieved for red PHOLEDs after rinsing of cross-linked EML, which were similar EQE of 5.36% (2.61 cd/A) of red PHOLEDs with cross-linked EML.