title: A non-fullerene electron acceptor based on fluorene and diketopyrrolopyrrole building blocks for solution-processable organic solar cells with an impressive open-circuit voltage.
abstract: A novel solution-processable non-fullerene electron acceptor 6,6'-(5,5'-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(thiophene-5,2-diyl))bis(2,5-bis(2-ethylhexyl)-3-(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione) (DPP1) based on fluorene and diketopyrrolopyrrole conjugated moieties was designed, synthesized and fully characterized. DPP1 exhibited excellent solubility and high thermal stability which are essential for easy processing. Upon using DPP1 as an acceptor with the classical electron donor poly(3-hexylthiophene), solution processable bulk-heterojunction solar cells afforded a power conversion efficiency of 1.2% with a high open-circuit voltage (1.1 V). As per our knowledge, this value of open circuit voltage is one of the highest values reported so far for a bulk-heterojunction device using DPP1 as a non-fullerene acceptor.
authors.affiliation: School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne Victoria 3001, Australia. sheshanath.bhosale@rmit.edu.au.
authors.forename: Hemlata
authors.initials: H
authors.lastname: Patil
authors.forename: Wang Xi
authors.initials: WX
authors.lastname: Zu
authors.forename: Akhil
authors.initials: A
authors.lastname: Gupta
authors.forename: Vijila
authors.initials: V
authors.lastname: Chellappan
authors.forename: Ante
authors.initials: A
authors.lastname: Bilic
authors.forename: Prashant
authors.initials: P
authors.lastname: Sonar
authors.forename: Anushri
authors.initials: A
authors.lastname: Rananaware
authors.forename: Sidhanath V
authors.initials: SV
authors.lastname: Bhosale
authors.forename: Sheshanath V
authors.initials: SV
authors.lastname: Bhosale
mesh_terms: D011211:Electric Power Supplies; D004583:Electrons; D005449:Fluorenes / Q000737:chemistry*; D011758:Pyrroles / Q000138:chemical synthesis / Q000737:chemistry*; D011789:Quantum Theory; D012993:Solar Energy; D013056:Spectrophotometry, Ultraviolet; D013876:Thiophenes / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: C000598992:6,6'-(5,5'-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(thiophene-5,2-diyl))bis(2,5-bis(2-ethylhexyl)-3-(thiophen-2-yl)pyrrolo(3,4-c)pyrrole-1,4(2H,5H)-dione); D005449:Fluorenes; D011758:Pyrroles; D013876:Thiophenes; C507295:poly(3-hexylthiophene); C041509:fluorene