Organic light-emitting diodes based on an ambipolar single crystal

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• 作者：Xianjie Li ; Yuanxiang Xu ; Feng Li ; ^{lifeng01@jlu.edu.cn} ; Yuguang Ma ; ^{ygma@jlu.edu.cn}
• 关键词：Slice-like organic single crystal ; Charge transport ; Time of flight technique ; Organic light-emitting diode
• 刊名：Organic Electronics
• 出版年：2012
• 期刊代码：137_15661199
• 类别：et
• 出版时间：May, 2012
• 卷：13
• 期：5
• 页码：762-766
• 文件大小：536 K

摘要

Slice-like organic single crystals of 1,4-bis(2-cyano-2-phenylethenyl)benzene (BCPEB) are grown by the physical vapor transport (PVT) method, and exhibit a very high photoluminescence quantum efficiency (桅_PL) of 75%. The ambipolar behavior of BCPEB single crystals are confirmed using the time of flight technique. The high efficiency and balanced (渭_h = 0.059 cm²/Vs and 渭_e = 0.070 cm²/Vs) carriers鈥?mobility imply that the BCPEB single crystal is a promising light-emitting layer in the diodes structure. Intense green electroluminescence (EL) from a diode has been successfully demonstrated at an applied electric field of 2 脳 10⁵ V/cm.