[8p-Z11-1~7] 12.4 Organic light-emitting devices and organic transistors

[8p-Z11-6] Organic Semiconductor Laser: Electrical and Optical Excitation

〇Katsumi Tanigaki^1,2, Thangavel Kanagasekaran³, Taiki Miura⁴, Hidekazu Shimotani⁴ (1.AIMR, Tohoku Univ., 2.BAQIS, China, 3.IISER, India, 4.Grad. Sch. Sci., Tohoku Univ.)

Keywords:Organic Semiconductor, Electrical luminescent devices, Laser

Optically-driven solid-state OSCLs (op-OSCLs) have been exemplified, and laser emission with various colors has been demonstrated to date. However, successful operation of electrically driven OSCLs (el-OSCLs) had still been difficult due to the low carrier mobilities as well as the low electron-injection efficiency in OSCs. we show intriguing experimental data of el-OSCL with FET structure in the cw mode using sc-BP3T as a laser medium, where a very sharp laser emission within the limit of a detector evidently emerges with a nonlinear increase in its intensity above the clear threshold of injection current density (^eJ_th). We compare both electrical and optical excitations for discussing the possibility of lasng.