TY  - 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 . .