期刊
ORGANIC ELECTRONICS
卷 68, 期 -, 页码 236-241出版社
ELSEVIER
DOI: 10.1016/j.orgel.2019.02.019
关键词
OLED; HIL; TS-CuPc; F4-TCNQ; Hole mobility
资金
- National Key R&D Program of China [2016YFB0400703]
- National Natural Science Foundation of China [61475106, 61875144]
- Natural Science Foundation of Jiangsu Province [BK20151264]
- Collaborative Innovation Center of Suzhou Nano Science and Technology (NANOCIC)
- 111 project
- Joint International Research Laboratory of CarbonBased Functional Materials and Devices
- Priority Academic Program Development of the Jiangsu Higher Education Institutions (PAPD)
Efficient carrier injection plays an important role in realizing high performance organic light-emitting diodes (OLEDs). Herein, we discuss the development of an efficient and stable hole injection layer (HIL), 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodim ethane (F-4-TCNQ) doped copper phthalocyanine-3,4',4 '',4 '''-tetra-sulfonaked acid tetra sodium salt (TS-CuPc) via a solution process, in OLEDs. The p-type-doped TS-CuPc film demonstrates an improved hole mobility and a better surface morphology with the help of F-4-TCNQ. By the F-4-TCNQ tailoring, the composite film forms a cascade energy level alignment, which would effectively facilitate hole transport. In addition, the aqueous solution processed TS-CuPc:F-4-TCNQ precursor is close to neutral with good stability for avoiding the electrode erosion. As a result, the fabricated OLEDs employing TS-CuPc:F-4-TCNQ as HIL show a maximum power efficiency of 46.4 lm W-1, which is significantly higher than the conventional device based on poly (3,4-ethylenedioxythiophene):poly (styrene-sulfonate) (PEDOT:PSS) which has a maximum power efficiency of 26.3 lm W-1.
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