We demonstrate a blue fluorescent organic light-emitting device having a current efficiency of 19.2 cd/A and an external quantum efficiency of 8.32% at 100 cd/m(2). While driving at 20 mA/cm(2), the device showed a current efficiency of 16.5 cd/A with a CIE coordinate at (0.155, 0.239) and an operation voltage of 5.14 V. The estimated half-decay lifetime is 15,611 h at an initial luminance of 1000 cd/m(2). The improved performance is the result of better carrier balance which is achieved by using bis(10-hydroxybenzo[h]quinolinato)beryllium (Bebq(2)) as the electron-transport layer. (C) 2007 The Electrochemical Society.