title: Highly Efficient Perovskite Solar Cells Employing an Easily Attainable Bifluorenylidene-Based Hole-Transporting Material.
abstract: The 4,4'-dimethoxydiphenylamine-substituted 9,9'-bifluorenylidene (KR216) hole transporting material has been synthesized using a straightforward two-step procedure from commercially available and inexpensive starting reagents, mimicking the synthetically challenging 9,9'-spirobifluorene moiety of the well-studied spiro-OMeTAD. A power conversion efficiency of 17.8 % has been reached employing a novel HTM in a perovskite solar cells.
authors.affiliation: Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.
authors.forename: Kasparas
authors.initials: K
authors.lastname: Rakstys
authors.affiliation: Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.
authors.forename: Michael
authors.initials: M
authors.lastname: Saliba
authors.affiliation: Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
authors.affiliation: Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.
authors.forename: Paul
authors.initials: P
authors.lastname: Gratia
authors.affiliation: Department of Solid State Electronics, Vilnius University, Sauletekio 9, Vilnius, 10222, Lithuania.
authors.forename: Egidijus
authors.initials: E
authors.lastname: Kamarauskas
authors.affiliation: Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.
authors.forename: Sanghyun
authors.initials: S
authors.lastname: Paek
authors.affiliation: Department of Solid State Electronics, Vilnius University, Sauletekio 9, Vilnius, 10222, Lithuania.
authors.forename: Vygintas
authors.initials: V
authors.lastname: Jankauskas
authors.affiliation: Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland. mdkhaja.nazzeruddin@epfl.ch.|Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia. mdkhaja.nazzeruddin@epfl.ch.
authors.forename: Mohammad Khaja
authors.initials: MK
authors.lastname: Nazeeruddin
keywords: bifluorenylidene; electrochemistry; hole-transporting materials; photovoltaics; solar cells