The operating voltage behavior of green fluorescent organic light emitting diode with blue common layer structure during laser imaging process

► The reason of increased operating voltage of OLED devices by laser imaging process. ► Comparison of OLED devices prepared with different environmental conditions during laser patterning. ► Effect of oxygen exposure or annealing on device performances. ► OLED devices fabricated with blue common layer structure. ► How to avoid the operating voltage increase during laser imaging process.