有机发光二极管中ADN掺杂ErQ的1.54μm电致发光
自行设计了基于8-羟基喹啉铒(ErQ)为发射层(EMLs)和二硝酰胺铵(ADN)为蓝光主体材料的近红外有机发光二级管.器件的基本结构为(p-Si/NPB/EML/Bphen/Bphen∶ Cs2CO3/Sm/Au),设计并比较了三套不同发射层结构(ErQ/ADN为双层结构器件,(ErQ/ADN)×3为多层结构器件,ErQ∶ ADN为掺杂结构器件)的器件.三组器件在一定的偏压下,均可发出1.54 μm的光,对应三价铒离子4I13/2→4I15/2的跃迁.其中,ADN∶ErQ(1∶1)掺杂结构的近红外电致发光强度是ADN/ErQ双层结构中的三倍.此外,不同掺杂浓度的ADN:ErQ复合膜做了以下表征...
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| Published in | 红外与毫米波学报 Vol. 33; no. 1; pp. 31 - 35 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
北京大学物理学院人工微结构与介观物理国家重点实验室,北京,100871
2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-9014 |
| DOI | 10.3724/SP.J.1010.2014.00031 |
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| Summary: | 自行设计了基于8-羟基喹啉铒(ErQ)为发射层(EMLs)和二硝酰胺铵(ADN)为蓝光主体材料的近红外有机发光二级管.器件的基本结构为(p-Si/NPB/EML/Bphen/Bphen∶ Cs2CO3/Sm/Au),设计并比较了三套不同发射层结构(ErQ/ADN为双层结构器件,(ErQ/ADN)×3为多层结构器件,ErQ∶ ADN为掺杂结构器件)的器件.三组器件在一定的偏压下,均可发出1.54 μm的光,对应三价铒离子4I13/2→4I15/2的跃迁.其中,ADN∶ErQ(1∶1)掺杂结构的近红外电致发光强度是ADN/ErQ双层结构中的三倍.此外,不同掺杂浓度的ADN:ErQ复合膜做了以下表征:吸收谱、光致发光谱和荧光寿命谱.实验结果证实了在近红外电致发光过程中存在从ADN主体分子到ErQ发射分子的高效率的能量转移. |
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| Bibliography: | QU Hai-Jing, TAO Li, WANG Wei, RAN Guang-Zhao (State Key Laboratory for Mesoscopic Physics and School of Physics, Peking University, Beijing 100871, China) 31-1577/TN A near-infrared (NIR) organic light-emitting devices (OLEDs) was demonstrated with emissive layers (EMLs) based on erbium (111) tris (8-hydroxyquinoline) (ErQ) and the blue host material of 9,10-di-beta-naphthylanthraeene (ADN). The fundamental structure of the devices is (p-Si/NPB/EML/Bphen/Bphen: Cs2COs/Sm/Au), where three sets of EMLs (ErQ/ADN bilayer, (ErQ/ADN) ×3 mnhilayer, and ErQ: ADN doped layer) have been compared. In all the three structures, 1.54 μm eleetroluminescence was observed due to the 4113/2 -4I15/2 transitions of Er3+. Compared with the ADN/ErQ bilayer structure, the NIR eleetrol (EL) intensity is stronger by three times in the ADN: ErQ( 1:1 ) doped structure. The ADN: ErQ composite films with different doping levels were further characterized by the measurements of absorption, photol and photoluminescence decay time. The resul |
| ISSN: | 1001-9014 |
| DOI: | 10.3724/SP.J.1010.2014.00031 |