Highly efficient molecular organic light-emitting diodes based on exciplex emission
Highly efficient molecular organic light-emitting diodes based on exciplex emission
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DOI：
10.1063/1.1563838
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发表时间：
2003-04-07
影响因子：
4
通讯作者：
Kafafi, ZH
中科院分区：
文献类型：
--
作者：
Palilis, LC;M채kinen, AJ;Kafafi, ZH
以硅烷衍生物为发射材料和电子输运材料，以空穴输运胺衍生物为载体的分子有机发光二极管（MOLEDs）实现了高效的杂化发射。硅酮衍生物2,5-二-（3-联苯）-1,1-二甲基- 3,4-二苯基硅环戊二烯（PPSPP）显示蓝色荧光（476 nm），固态光致发光量子产率高达85%。另一硅酮衍生物2,5-二-（2′，2′-联吡啶-6-基）-1,1-二甲基-3,4-二苯基硅环戊二烯具有较高的电子迁移率，被用作电子传递材料。以这两种硅孔和N，N'-二苯基-N，N-'-（2-萘基）-（1,1'-苯基）-4,4(')-二胺（NPB）为空穴转运体的MOLEDs显示出以495nm为中心的电致发光（EL）。相对于PPSPP的蓝色荧光，这种红移的EL波段被分配给NPB:PPSPP外复合物。在100 cd/m(2)下测量了4.5 V的工作电压，在100 A/m(2)下实现了3.4%的EL量子效率。(C) 2003年美国物理研究所。
Highly efficient exciplex emission is observed from molecular organic light-emitting diodes (MOLEDs) based on silole derivatives as emissive and electron transport materials, and a hole transporting amine derivative. A silole derivative, 2,5-di-(3-biphenyl)-1,1-dimethyl- 3,4-diphenylsilacyclopentadiene (PPSPP), which shows blue fluorescence (476 nm) with a high solid-state photoluminescence quantum yield of 85% was used as the emitter. Another silole derivative, 2,5-bis-(2',2'-bipyridin-6-yl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene which exhibits high electron mobility, was used as the electron transport material. MOLEDs using these two siloles and N,N'-diphenyl-N,N-'-(2-napthyl)-(1,1'-phenyl)-4,4(')-diamine (NPB) as the hole transporter show electroluminescence (EL) emission centered at 495 nm. This red-shifted EL band relative to the blue fluorescence of PPSPP is assigned to a NPB:PPSPP exciplex. An operating voltage of 4.5 V was measured at 100 cd/m(2) and an EL quantum efficiency of 3.4% was achieved at 100 A/m(2). (C) 2003 American Institute of Physics.