期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 10, 页码 12268-12277出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c22456
关键词
graphene; phosphomolybdic acid; p-type doping; organic light-emitting diodes; perovskite light-emitting diodes
资金
- National Key R&D Program of China [2017YFB0404501]
- National Major Fundamental Research Program of China [91833306]
- NSFC [61675088, 61704091, 61705111, 61974054, 62074083, 62005131]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Priority Academic Program Development of Jiangsu Higher Education Institutions [YX030003]
- Science Fund for Distinguished Young Scholars of Jiangsu Province of China [BK20160039]
- International Science & Technology Cooperation Program of Jilin Province [20190701023GH]
- Scientific & Technological Developing Scheme of Jilin Province [20200401045GX]
- Open Foundation from Jilin University [IOSKL2017KF04]
The study proposes phosphomolybdic acid (PMA) as a novel p-type chemical dopant for graphene, achieving a monolayer graphene electrode with lower sheet resistance and work function while maintaining high transmittance. PMA-doped graphene shows improved efficiency in organic and perovskite light-emitting diodes, demonstrating the potential of PMA as a p-type chemical dopant for ideal graphene electrodes.
Graphene is a promising flexible transparent electrode, and significant progress in graphene-based optoelectronic devices has been accomplished by reducing the sheet resistance and tuning the work function. Herein, phosphomolybdic acid (PMA) is proposed as a novel p-type chemical dopant for graphene, and the optical and electrical properties of graphene are investigated systematically. As a result, the monolayer graphene electrode with lower sheet resistance and work function are obtained while maintaining a high transmittance. The Raman spectrum proves the p-type doping effect of PMA on graphene, and the X-ray photoelectron spectroscopy results reveal the mechanism, which is that the electrons transfer from graphene to PMA through the Mo-O-C bond. Furthermore, using the PMA-doped graphene anode, organic and perovskite light-emitting diodes obtained the maximum efficiencies of 129.3 and 15.6 cd/A with an increase of 50.8 and 36.8% compared with the pristine counterparts, respectively. This work confirms that PMA is a potential p-type chemical dopant to achieve an ideal graphene electrode and demonstrates the feasibility of PMA-doped graphene in the practical application of next-generation displays and solid-state lighting.
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