Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 8, Pages 7289-7295Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b19039
Keywords
graphene; PMMA; transfer method; hole-injection layer; F(4)TCNQ; OLEDs
Funding
- Science Fund for Distinguished Young Scholars of Jiangsu Province of China [BK20160039]
- Open Foundation from Jilin University [IOSKL2017KF04]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- NSFC [11674016]
- STINT [CH2015-6202]
- Priority Academic Program Development of Jiangsu Higher Education Institutions [YX030002]
- National Natural Science Foundation of China [61704091, 61505086, 61705111, 61274065]
- National Foundation for Science and Technology Development (973 project) [2015CB932203]
- National Key Research and Development Program of China [2017YFB0404501]
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Natural Science Foundation of Jiangsu Province [BM2012010]
- Nat. Key RD [2017YFB0403102]
- Beijing M. Sci. Tech. [Z161100002116032]
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Graphene as one of the most promising transparent electrode materials has been successfully applied in organic light-emitting diodes (OLEDs). However, traditional poly(methyl methacrylate) (PMMA) transfer method usually results in hardly removed polymeric residues on the graphene surface, which induces unwanted leakage current, poor diode behavior, and even device failure. In this work, we proposed a facile and efficient two-in-one method to obtain clean graphene and fabricate OLEDs, in which the poly(9,9-di-n-octylfluorene-alt-(1,4-phenylene-(4-secbutylphenyl)imino)-1,4-phenylene) (TFB) layer was inserted between the graphene and PMMA film both as a protector during the graphene transfer and a hole injection layer in OLEDs. Finally, green OLED devices were successfully fabricated on the PMMA-free graphene/TFB film, and the device luminous efficiency was increased from 64.8 to 74.5 cd/A by using the two-in-one method. Therefore, the proposed two-in-one graphene transfer method realizes a high-efficient graphene transfer and device fabrication process, which is also compatible with the roll-to-roll manufacturing. It is expected that this work can enlighten the design and fabrication of the graphene-based optoelectronic devices.
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