Zhao, Y.Chen, R.Gao, Y.Leck, K.S.Yang X.Liu, S.Abiyasa, A.P.Divayana, Y.Mutlugun, E.Tan, S.T.Sun H.Demir, Hilmi VolkanSun X.W.2016-02-082016-02-08201315661199http://hdl.handle.net/11693/20753In this paper, a color- and brightness-tunable organic light-emitting diode (OLED) is reported. This OLED was realized by inserting a charge generation layer into an electron only device to form an n-i-p-i-n structure. It is shown that, by changing the polarity of applied voltage, only the p-i-n junction operated under positive bias can emit light and, by applying an AC voltage, emission from both junctions was realized. It is also shown that, by using a combination of blue- and red-emiting layers in two p-i-n junctions, both the color and brightness of the resulting white OLED can be tuned independently by changing the positive and negative amplitudes of the AC voltage. © 2013 Elsevier B.V. All rights reserved.EnglishAC drivingAlternating currentCharge generation layerColor tunableOrganic light-emitting diodeTransition metal oxideAc-drivingAlternating currentCharge-generation layersColor tunableOrganic light emitting diodes(OLEDs)Transition-metal oxidesElectronic equipmentLuminanceOrganic light emitting diodes (OLED)ColorArticle10.1016/j.orgel.2013.09.028