光谱学与光谱分析, 2011, 31 (4): 882, 网络出版: 2011-05-30
利用NPB/MoO3/NPB作为空穴传输层的低驱动电压的有机发光器件
Low Driving Voltage in Organic Light-Emitting Diodes with NPB/MoO3/NPB as a Hole Transport Layer
摘要
通过引入(NPB/MoO3)x/NPB作为空穴传输层, 获得了低驱动电压的有机电致发光器件(OLEDs), (NPB/MoO3)x为多层结构(x为0, 1和2)。 通过对比发现, 在相同亮度下, x=1对应的器件具有最低的工作电压。 这是由于在NPB和MoO3之间产生了电荷转移复合物(charge transfer, CT), 这将会降低器件的空穴注入势垒, 从而降低其工作电压。 文中所研究器件为基于8-羟基喹啉铝(tris(8-hydroxyquinoline) aluminum, Alq3)的绿光器件。 与x=0时的普通器件相比, 在亮度为1 000 cd·m-2时, x=1时的工作电压降低了0.8 V。
Abstract
Driving voltage of organic light-emitting diodes (OLEDs) was lowered by applying (NPB/MoO3)x/NPB as a hole transport layer (HTL).(NPB/MoO3)x was multi-layer periodic (MLP) structure with x changed from 0 to 3.Compared with the conventional device with 0-periodic structure, the driving voltage of the device with 1-periodic structure was the lowest.This was due to charge transfer (CT) complex formation between NPB and MoO3.The driving voltage of tris(8-hydroxyquinoline) aluminum (Alq3)-based organic light-emitting devices (OLEDs) could be lowered by 0.8 V at 1 000 cd·m-2 by using multiple structure of NPB/MoO3/NPB.
刘国强, 纪文宇, 谢文法, 张汉壮. 利用NPB/MoO3/NPB作为空穴传输层的低驱动电压的有机发光器件[J]. 光谱学与光谱分析, 2011, 31(4): 882. LIU Guo-qiang, JI Wen-yu, XIE Wen-fa, ZHANG Han-zhuang. Low Driving Voltage in Organic Light-Emitting Diodes with NPB/MoO3/NPB as a Hole Transport Layer[J]. Spectroscopy and Spectral Analysis, 2011, 31(4): 882.
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