Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment
Само за регистроване кориснике
2018
Аутори
Tomasevic-Ilic, TijanaJovanović, Đorđe
Popov, Igor
Fandan, Rajveer
Pedros, Jorge
Spasenović, Marko
Gajic, Rados
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Liquid phase exfoliation followed by Langmuir-Blodgett self-assembly (LBSA) is a promising method for scalable production of thin graphene films for transparent conductor applications. However, monolayer assembly into thin films often induces a high density of defects, resulting in a large sheet resistance that hinders practical use. We introduce UV/ozone as a novel photochemical treatment that reduces sheet resistance of LBSA graphene threefold, while preserving the high optical transparency. The effect of such treatment on our films is opposite to the effect it has on mechanically exfoliated or CVD films, where UV/ozone creates additional defects in the graphene plane, increasing sheet resistance. Raman scattering shows that exposure to UV/ozone reduces the defect density in LBSA graphene, where edges are the dominant defect type. FTIR spectroscopy indicates binding of oxygen to the graphene lattice during exposure to ozone. In addition, work function measurements reveal that the tre...atment dopes the LBSA film, making it more conductive. Such defect patching paired with doping leads to an accessible way of improving the transparent conductor performance of LBSA graphene, making solutionprocessed thin films a candidate for industrial use.
Кључне речи:
UV/ozone treatment / Transparent conductors / Liquid phase exfoliation / Langmuir-Blodgett assembly / Graphene films / Defect patchingИзвор:
Applied Surface Science, 2018, 458, 446-453Издавач:
- Elsevier, Amsterdam
Финансирање / пројекти:
- Qatar National Research Foundation [NPRP 7-665-1-125]
- Innovation Fund through the Collaborative Grant Scheme
- European Union's Horizon 2020 Research and Inovation Programme under Marie Sklodowska-Curie Grant [642688]
- Spanish MINECOSpanish Government [RyC-2015-18968]
- Spanish MINECO (project GRAFAGEN) [ENE2013-47904-C3]
- International Erasmus+ project [2015-2-ES01-KA107-022648]
- Физика уређених наноструктура и нових материјала у фотоници (RS-MESTD-Basic Research (BR or ON)-171005)
- Наноструктурни мултифункционални материјали и нанокомпозити (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45018)
DOI: 10.1016/j.apsusc.2018.07.111
ISSN: 0169-4332
WoS: 000441400000052
Scopus: 2-s2.0-85050081992
Институција/група
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Tomasevic-Ilic, Tijana AU - Jovanović, Đorđe AU - Popov, Igor AU - Fandan, Rajveer AU - Pedros, Jorge AU - Spasenović, Marko AU - Gajic, Rados PY - 2018 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1113 AB - Liquid phase exfoliation followed by Langmuir-Blodgett self-assembly (LBSA) is a promising method for scalable production of thin graphene films for transparent conductor applications. However, monolayer assembly into thin films often induces a high density of defects, resulting in a large sheet resistance that hinders practical use. We introduce UV/ozone as a novel photochemical treatment that reduces sheet resistance of LBSA graphene threefold, while preserving the high optical transparency. The effect of such treatment on our films is opposite to the effect it has on mechanically exfoliated or CVD films, where UV/ozone creates additional defects in the graphene plane, increasing sheet resistance. Raman scattering shows that exposure to UV/ozone reduces the defect density in LBSA graphene, where edges are the dominant defect type. FTIR spectroscopy indicates binding of oxygen to the graphene lattice during exposure to ozone. In addition, work function measurements reveal that the treatment dopes the LBSA film, making it more conductive. Such defect patching paired with doping leads to an accessible way of improving the transparent conductor performance of LBSA graphene, making solutionprocessed thin films a candidate for industrial use. PB - Elsevier, Amsterdam T2 - Applied Surface Science T1 - Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment EP - 453 SP - 446 VL - 458 DO - 10.1016/j.apsusc.2018.07.111 ER -
@article{ author = "Tomasevic-Ilic, Tijana and Jovanović, Đorđe and Popov, Igor and Fandan, Rajveer and Pedros, Jorge and Spasenović, Marko and Gajic, Rados", year = "2018", abstract = "Liquid phase exfoliation followed by Langmuir-Blodgett self-assembly (LBSA) is a promising method for scalable production of thin graphene films for transparent conductor applications. However, monolayer assembly into thin films often induces a high density of defects, resulting in a large sheet resistance that hinders practical use. We introduce UV/ozone as a novel photochemical treatment that reduces sheet resistance of LBSA graphene threefold, while preserving the high optical transparency. The effect of such treatment on our films is opposite to the effect it has on mechanically exfoliated or CVD films, where UV/ozone creates additional defects in the graphene plane, increasing sheet resistance. Raman scattering shows that exposure to UV/ozone reduces the defect density in LBSA graphene, where edges are the dominant defect type. FTIR spectroscopy indicates binding of oxygen to the graphene lattice during exposure to ozone. In addition, work function measurements reveal that the treatment dopes the LBSA film, making it more conductive. Such defect patching paired with doping leads to an accessible way of improving the transparent conductor performance of LBSA graphene, making solutionprocessed thin films a candidate for industrial use.", publisher = "Elsevier, Amsterdam", journal = "Applied Surface Science", title = "Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment", pages = "453-446", volume = "458", doi = "10.1016/j.apsusc.2018.07.111" }
Tomasevic-Ilic, T., Jovanović, Đ., Popov, I., Fandan, R., Pedros, J., Spasenović, M.,& Gajic, R.. (2018). Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment. in Applied Surface Science Elsevier, Amsterdam., 458, 446-453. https://doi.org/10.1016/j.apsusc.2018.07.111
Tomasevic-Ilic T, Jovanović Đ, Popov I, Fandan R, Pedros J, Spasenović M, Gajic R. Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment. in Applied Surface Science. 2018;458:446-453. doi:10.1016/j.apsusc.2018.07.111 .
Tomasevic-Ilic, Tijana, Jovanović, Đorđe, Popov, Igor, Fandan, Rajveer, Pedros, Jorge, Spasenović, Marko, Gajic, Rados, "Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment" in Applied Surface Science, 458 (2018):446-453, https://doi.org/10.1016/j.apsusc.2018.07.111 . .