A novel device using a LiF layer both at the anode-organic interface and at the cathode-organic interface was fabricated, combining a weakened hole injection with enhanced electron injection. The device showed the highest luminance of 21 000 cd/m(2) m(2) at a fixed bias of 12 V. The device exhibits a steeper I-V characteristic and a higher brightness than that of the devices of other structures. The steeper I-V characteristic of the device may be useful to an organic electrically pumped laser.