[19a-P4-1~31] 12.4 Organic light-emitting devices and organic transistors

[19a-P4-13] Luminescent Properties of Green Phosphorescent Cyclometalated Platinum(II) Complexes in Polymer Thin Films

〇Yoshiaki Sakurai¹, Shigeyuki Yagi², Chen Qiang², Tatsuya Shigehiro², Takeshi Maeda², Hiroyuki Nakazumi² (1.TRI Osaka, 2.OPU)

Keywords:green phosphorescent cyclometalated platinum(II) Complexes,photoluminescent property,electroluminescent property

Considerable attention has been paid to the phosphorescent materials from a standpoint of the improvement of device performances of organic light-emitting diodes (OLEDs). Particularly, organometallic complexes with heavy metal centers are reliable candidates because the strong spin-orbital coupling induced by the metal center gives rise to efficient triplet generation to afford highly efficient room-temperature phosphorescence. Among them, cyclometalated platinum(II) complexes are one of the representative compounds. We recently reported cyclometalated platinum(II) complexes bearing a 2-(dibenzo-[b, d]furan-4-yl)pyridine (dbfp) cyclometalated ligand, that exhibit highly efficient green phosphorescence. To study the effect of a series of substituents on emission behavior of a the dbfp-based complex, we investigated the photoluminescence (PL) properties of green phosphorescent cyclometalated platinum(II) complexes in the thin polymer films. In addition, we report electroluminescence (EL) behavior of polymer light-emitting diodes (PLEDs) containing these platinum(II) complexes as emitting dopants.