掺杂空穴传输层的有机电致发光器件性能研究  

Performance of organic light emitting diodes with doped hole transport layer

作　　者：徐维[1,2] 乔日东[3] 尚福军[3] 

机构地区：[1]西安交通大学先进制造技术研究所,陕西西安710049 [2]五邑大学应用物理与材料学院,广东江门529020 [3]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《兵器材料科学与工程》2010年第3期19-22,共4页Ordnance Material Science and Engineering

基　　金：中国博士后基金(No20090461297)

摘　　要：以F4-TCNQ为p型掺杂剂,掺入m-MTDATA作为空穴传输层,ITO导电玻璃作为阳极,Alq3作为发光层,Bphen作为电子传输层,LiF和Al分别用作电子注入层和阴极,制备有机电致发光器件。相比于未掺杂器件,电压及功率效率获得提高。这归功于p型掺杂使阳极与空穴传输层界面产生欧姆接触,及空穴传输层传导率的提高,而随着掺杂的引入及掺杂浓度的增加,注入的空穴变得过剩,使载流子不平衡变得越发严重,导致器件电流效率及亮度降低。因此,应该加强电子的注入及传输,以达到载流子平衡,同时达到降低器件电压、提高功率效率、电流效率及亮度的目的。An organic light emitting diodes with the structure of ITO/4,4′,4″-tris（3-methylphenylphenylamono） triphenylamine（m-MTDATA）：x%F4-TCNQ（40 nm）/NPB（10 nm）/Alq3（20 nm）/BPhen：（30 nm）/LiF（1 nm）/Al（130 nm） were fabricated.mMTDATA：F4-TCNQ,Alq3,BPhen,Liq and Al were used as hole transport layer（HTL）,emission layer（EML）,electron transport layer（ETL）,electron injection layer（EIL） and cathode respectively.The voltage is reduced and power efficiency is improved with F4-TCNQ doped into m-MTDATA.It′s attributed to the ohmic contact between ITO/HTL interface.However,the current efficiency and luminance is reduced due to the unbalance between hole and electron,so electron injection and transport should be enhanced.As a result,carriers balance,reduced voltage,enhanced current and power efficiency,and the luminance of the devices can be achieved.

关 键 词：掺杂 有机电致发光器件 载流子平衡 

分 类 号：TN383[电子电信—物理电子学]