Carrier transportation, photoluminescence and lasing characteristics of 1,4-bis[2-[4-[N,N-di(p-tolyl)amino]phenyl]vinyl]benzene: implications for diode-pumped organic solid-state lasers

Two potential schemes were proposed in this work to realize an organic solid laser pumped by electroluminescence emission in an integrated organic light emitting diode (OLED) employing low threshold laser dyes, [1,4-bis[2-[4-[N,N-di(p-tolyl)amino]phenyl]vinyl]benzene (DSB) and DSB doped with 4-(dicyanomethylene)-2-t-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB), as the hole injection layer (HIL). Using DSB as HIL was found to improve the efficiency of the device, which exhibited peak efficiencies of 9.59 cd A(-1) and 6.93 lm W-1. For the system employing DSB doped with DCJTB as HIL, the mobility of the electron transport layer made a large contribution to the realization of a diode-pumped organic solid-state laser. Moreover, the optical characteristics of organic films pumped by a pulsed Nd:YAG laser at 355 nm were also investigated.