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New blue phosphorescence from trifluorosulfonyl-substituted iridium complexes

Authors
  • HA, YEON HEE
  • SOHN, SUNYOUNG
  • HAN, SEUNG-HOON
  • KIM, BOND GON
  • AHN, HYUNGJU
  • JUNG, SUNGJUNE
  • KWON, SOON-KI
  • KIM, YUN-HI
Publication Date
Jan 14, 2019
Source
[email protected]
License
Unknown
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Abstract

For color-pure phosphorescence organic light emitting diodes (PHOLEDs), we synthesized the trifluorometh) sulfonyl substituted ligand and two new blue Iridium complexes with perfluoro-sulfonyl group (SOCF(3)pic an, SOCF(3)mpic). The both iridium complexes showed similar photophysical and thermal properties while the HON energy leves of two Iridium complexes slightly differnet to be -5.84 eV for SOCF(3)pic and -5.74 eV fa SOCF(3)mpic, respectively. The device with the SOCF(3)mpic dopant exhibited higher device efficiencies of 7.17 cd A and 3.7% compared to that with the SOCF(3)pic dopant (4.03 cd/A and 2.78%). Two-dimensional GIXD image of scattered X-ray intensity from surface to full depth for SOCF(3)pic-doped and SOCF(3)mpic-doped TCTA:4PTP films were characterized for preferential orientation along the out-of-plane direction. / 1 / N

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