Synthesis and characterization of thermally crosslinkable hole-transporting polymers for PLEDs
作者:Sang-Mi Park、Kyoung-Soo Yook、Woo-Hyung Lee、Yongtaek Hong、Jun-Yeob Lee、In-Nam Kang
DOI:10.1002/pola.26943
日期:2013.12.1
Two new thermally crosslinkable hole‐transporting polymers, X‐PTPA and X‐PCz, were synthesized via Yamamoto coupling reactions. The number‐averaged molecular weights (Mn) of X‐PTPA and X‐PCz were found to be 45,000 and 48,000, respectively, and therewith, polydispersity indices were of 1.8 and 1.7, respectively. Thermally crosslinked X‐PTPA and X‐PCz exhibit excellent solvent resistance and stable
通过Yamamoto偶联反应合成了两种新型的可热交联的空穴传输聚合物X-PTPA和X-PCz。数均分子量(M nX-PTPA和X-PCz的)分别为45,000和48,000,因此多分散指数分别为1.8和1.7。热交联的X‐PTPA和X‐PCz具有出色的耐溶剂性和稳定的光电性能。薄膜状态下X-PTPA和X-PCz的紫外可见最大吸收峰分别在389 nm和322 nm。X-PTPA和X-PCz的HOMO电平分别估计为-5.27和-5.39 eV。多层器件(ITO /交联的X-PTPA或X-PCz / SY-PPV / LiF / Al)以SY(超黄色)作为发光层制造。具有交联的X-PTPA层的多层设备的最大效率大约是不具有交联的X-PTPA层的设备的三倍,并且远高于交联的X-PCz设备的效率。观察到的结果可以解释这一结果,即交联的X-PTPA会在发射极SY内增加电子积累,并由于电荷平衡的改善而形成有效的激子。©2013