AC-driven, color- and brightness-tunable organic light-emitting diodes constructed from an electron only device

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• 作者：Yongbiao Zhao ; Rui Chen ; Yuan Gao ; Kheng Swee Leck ; Xuyong Yang ; Shuwei Liu ; Agus Putu Abiyasa ; Yoga Divayana ; Evren Mutlugun ; Swee Tiam Tan ; H ; ong Sun ; Hilmi Volkan Demir ; Xiao Wei Sun
• 关键词：Organic light-emitting diode ; Alternating current ; AC driving ; Color tunable ; Charge generation layer ; Transition metal oxide
• 刊名：Organic Electronics
• 出版年：December, 2013
• 年：2013
• 卷：14
• 期：12
• 页码：3195-3200
• 全文大小：1890 K

文摘

In 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.