title: Novel Solid-State Solar Cell Based on Hole-Conducting MOF-Sensitizer Demonstrating Power Conversion Efficiency of 2.1.
abstract: This work reports on designing of first successful MOF-sensitizer based solid-state photovoltaic device, perticularly with a meaningful output power conversion efficiency. In this study, an intrinsically conductive cobalt-based MOFs (Co-DAPV) formed by the coordination between Co (II) ions and a redox active di(3-diaminopropyl)-viologen (i.e., DAPV) ligand is investigated as sensitizer. Hall-effect measurement shows p-type conductivity of the Co-DAPV film with hole mobility of 0.017 cm2V-1s-1, suggesting its potential application as hole transporting sensitizer. Further, the energy levels of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of Co-DAPV are well-matched to be suitably employed for sensitizing TiO2. Thus, by layer-by-layer deposition of hole conducting MOF-sensitizer onto mesoporous TiO2film, a power conversion efficiency of as high as 2.1% is achieved, which exceeds the highest efficiency values of MOF-sensitized liquid-junction solar cells reported so far.
authors.affiliation: Institute of Materials Design, Department of Chemistry, Hanyang University , Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Do Young
authors.initials: DY
authors.lastname: Ahn
authors.affiliation: Institute of Materials Design, Department of Chemistry, Hanyang University , Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Deok Yeon
authors.initials: DY
authors.lastname: Lee
authors.affiliation: Institute of Materials Design, Department of Chemistry, Hanyang University , Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Chan Yong
authors.initials: CY
authors.lastname: Shin
authors.affiliation: Institute of Materials Design, Department of Chemistry, Hanyang University , Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Hoa Thi
authors.initials: HT
authors.lastname: Bui
authors.affiliation: Department of Energy and Materials Engineering, Dongguk University , Seoul 100-715, Republic of Korea.
authors.forename: Nabeen K
authors.identifier: http://orcid.org/0000-0002-4849-4121
authors.initials: NK
authors.lastname: Shrestha
authors.affiliation: Leibniz-Institute for Solid State and Materials Research (IFW) Dresden , Helmholtzstrasse 20, 01069 Dresden, Germany.
authors.forename: Lars
authors.identifier: http://orcid.org/0000-0002-6703-8447
authors.initials: L
authors.lastname: Giebeler
authors.affiliation: Department of Energy and Materials Engineering, Dongguk University , Seoul 100-715, Republic of Korea.
authors.forename: Yong-Young
authors.initials: YY
authors.lastname: Noh
authors.affiliation: Institute of Materials Design, Department of Chemistry, Hanyang University , Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Sung-Hwan
authors.initials: SH
authors.lastname: Han
keywords: hole conductor; metal−organic-frameworks; sensitizer; solar cell; solid-state