title: Synthesis, characterization and optoelectronic properties of a new perylene diimide-benzimidazole type solar light harvesting dye.
abstract: A perylene diimide type small molecule (BI-PDI) has been synthesized through Suzuki coupling reaction between N,N'-bis(2,6-diisopropylphenyl)-1,7-dibromoperylene-3,4,9,10-tetracarboxylic diimide and 2-(2-hydroxyphenyl)-7-phenyl-1H-benzimidazole-4-boronic acid. BI-PDI small molecule has showed an absorption band between 350 and 750 nm on thin films. HOMO and LUMO energy levels of BI-PDI dye have been calculated to be about -5.92 eV and -3.82 eV, respectively. Solution-processed bulk heterojunction (BHJ) solar cells have been constructed using BI-PDI as donor and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) as acceptor or poly(3-hexylthiophene) (P3HT) as donor and BI-PDI as acceptor. The external quantum efficiencies (EQE) of the devices cover the most of the visible region between 400 and 700 nm for both configurations. Photovoltaic performances of BI-PDI-based organic solar cells are limited by the aggregation tendency of PDI structure and poor hole/electron mobilities of the active layer.
authors.affiliation: Department of Chemistry, Faculty of Arts and Science, Celal Bayar University, Muradiye, 45030 Manisa, Turkey. Electronic address: haluk.dincalp@cbu.edu.tr.
authors.forename: Haluk
authors.initials: H
authors.lastname: Dinçalp
authors.affiliation: Department of Chemistry, Faculty of Arts and Science, Celal Bayar University, Muradiye, 45030 Manisa, Turkey.
authors.forename: Oguzhan
authors.initials: O
authors.lastname: Çimen
authors.affiliation: Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University, Martensstraße 7, 91058 Erlangen, Germany.
authors.forename: Tayebeh
authors.initials: T
authors.lastname: Ameri
authors.affiliation: Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University, Martensstraße 7, 91058 Erlangen, Germany.
authors.forename: Christoph J
authors.initials: CJ
authors.lastname: Brabec
authors.affiliation: Solar Energy Institute, Ege University, Bornova, 35100 Izmir, Turkey. Electronic address: siddik.icli@ege.edu.tr.
authors.forename: Sıddık
authors.initials: S
authors.lastname: İçli
mesh_terms: D001562:Benzimidazoles / Q000737:chemistry*; D007094:Imides / Q000737:chemistry*; D008027:Light; D010569:Perylene / Q000031:analogs & derivatives* / Q000737:chemistry; D012993:Solar Energy
chemical_list: D001562:Benzimidazoles; D007094:Imides; C521332:perylenediimide; D010569:Perylene; C031000:benzimidazole
keywords: Benzimidazole; Charge transfer; Light harvesting; Perylene diimide; Photoluminescence; Photovoltaics