A Pyridine‐Containing Anthracene Derivative with High Electron and Hole Mobilities for Highly Efficient and Stable Fluorescent Organic Light‐Emitting Diodes

• DOI: 10.1002/adfm.201002691
• Publication Date: 2011-04-12T08:35:48Z
• Authors: Yongduo Sun; Lian Duan; Deqiang Zhang; Juan Qiao; Guifang Dong; Liduo Wang; Yong Qiu
• Keywords: Ambipolar diffusion

Abstract A pyridine‐containing anthracene derivative, 9,10‐bis(3‐(pyridin‐3‐yl)phenyl)anthracene (DPyPA), which comprehensively outperforms the widely used electron‐transport material (ETM), tris(8‐quinolinolato) aluminum (Alq 3 ), is synthesized. DPyPA exhibits ambipolar transport properties, with both electron and hole mobilities of around 10 −3 cm −2 V −1 s ; about two orders magnitude higher than that Alq . The nitrogen atom in pyridine ring coordinates to lithium cations, leads efficient injection when LiF/Al as cathode. Electrochemical measurements demonstrate cations anions are stable, may improve stability devices based on DPyPA. Red‐emitting, green‐emitting, blue‐emitting fluorescent organic light emitting diodes ETM display lower turn‐on voltages, efficiencies, stronger luminance ETM. power efficiencies greater by 80–140% relative those ‐based devices. improved performance these attributed increased carrier balance. In addition, device employing possesses excellent stability: half‐life DPyPA‐based 67 000 h—seven times longer device—for an initial 5000 cd m