[11a-S222-1~12] 12.4 Organic light-emitting devices and organic transistors

[11a-S222-1] Correlation between Electrical- and Optical- Driven Mode in Oscillation
of Organic Semiconductor Lasers

〇Katsumi Tanigaki^1,2, Thangavel Kanagasekaran¹, Hidekazu Shimotani², Shun Onuki², Taiki Miura² (1.AIMR, Tohoku Univ., 2.Department of Physics, Graduate Schoool of Science, Tohoku Univ.)

Keywords:Organic smeiconductor laser, Organic field-effect transistor, New device

Optically driven solid-state OSCLs (op-OSCLs) have later been exemplified, and laser emission with various colors has been demonstrated to date. However, successful operation of electrically driven OSCLs (el-OSCLs) had still not yet been achieved due to the low carrier mobilities and the low electron-injection efficiency in OSCs. Recently, we have challenged for the realization of el-OSCLs and reported very intriguing indication of a successful el-OSCL with FET structure using sc-BP3T as a laser medium, where both very sharp laser emission reaching the resolution limit of a detector emerges with a nonlinear increase in its intensity above the clear threshold of injection current density. For the purpose of realizing highly efficient light-emitting devices such as OSC lasers, the fundamental understanding on the difference between EL and PL are necessary. Here, we report accurate comparative studies on the difference between PL and EL of 5,5’’-Bis(4-biphenylyl)-2,2’:5’,2’’-terthiophene (BP3T).