title: Reduced Graphene Oxide/Mesoporous TiO2 Nanocomposite Based Perovskite Solar Cells.
abstract: We report on reduced graphene oxide (rGO)/mesoporous (mp)-TiO2 nanocomposite based mesostructured perovskite solar cells that show an improved electron transport property owing to the reduced interfacial resistance. The amount of rGO added to the TiO2 nanoparticles electron transport layer was optimized, and their impacts on film resistivity, electron diffusion, recombination time, and photovoltaic performance were investigated. The rGO/mp-TiO2 nanocomposite film reduces interfacial resistance when compared to the mp-TiO2 film, and hence, it improves charge collection efficiency. This effect significantly increases the short circuit current density and open circuit voltage. The rGO/mp-TiO2 nanocomposite film with an optimal rGO content of 0.4 vol % shows 18% higher photon conversion efficiency compared with the TiO2 nanoparticles based perovskite solar cells.
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University , Suwon 440-746, Republic of Korea.|Department of Mechanical Engineering and Materials Science, University of Pittsburgh , Pittsburgh, Pennsylvania 15261, United States.
authors.forename: Gill Sang
authors.initials: GS
authors.lastname: Han
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University , Suwon 440-746, Republic of Korea.
authors.forename: Young Hyun
authors.initials: YH
authors.lastname: Song
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University , Suwon 440-746, Republic of Korea.
authors.forename: Young Un
authors.initials: YU
authors.lastname: Jin
authors.affiliation: School of Chemical Engineering and Department of Energy Science, Sungkyunkwan University , Suwon, 440-746, Korea.
authors.forename: Jin-Wook
authors.initials: JW
authors.lastname: Lee
authors.affiliation: School of Chemical Engineering and Department of Energy Science, Sungkyunkwan University , Suwon, 440-746, Korea.
authors.forename: Nam-Gyu
authors.initials: NG
authors.lastname: Park
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University , Suwon 440-746, Republic of Korea.
authors.forename: Bong Kyun
authors.initials: BK
authors.lastname: Kang
authors.affiliation: Department of Mechanical Engineering and Materials Science, University of Pittsburgh , Pittsburgh, Pennsylvania 15261, United States.
authors.forename: Jung-Kun
authors.initials: JK
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering & Energy Systems Research, Ajou University , Suwon 443-749, Korea.
authors.forename: In Sun
authors.initials: IS
authors.lastname: Cho
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University , Suwon 440-746, Republic of Korea.|SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University , Suwon 440-746, Korea.
authors.forename: Dae Ho
authors.initials: DH
authors.lastname: Yoon
authors.affiliation: School of Advanced Materials Science & Engineering, Sungkyunkwan University , Suwon 440-746, Republic of Korea.
authors.forename: Hyun Suk
authors.initials: HS
authors.lastname: Jung
keywords: TiO2 nanocomposite; charge collection; electron transport layer; perovskite solar cells; reduced graphene oxide