Synthesis and solar cells applications of EO‐PF‐DTBT polymer

Abstract

Poly{[2,7-(9,9-bis-(1-(2-(2-methoxyethoxy)ethoxy)ethyl)-fluorene)]-alt- [5,5-(4,7-di-2 0 -thienyl-2,1,3-benzothiadiazole)]} (EO-PF-DTBT) was synthesized by Suzuki coupling reaction. The polymer is soluble in common organic solvent, such as toluene, THF, and chloroform, and it also shows solubility in polar solvent, such as cyclopentanone. Solar cells based on EO-PF-DTBT and PC 61 BM show maximum power conversion efficiency of 2.65% with an open circuit voltage (V OC ) of 0.86 V, a short circuit current density (J SC ) of 6.10 mA/cm 2 , and a fill factor of 51% under AM 1.5G illumination at 100 mW/cm 2 , which is the best results for fluorene and 4,7-di-2-thienyl-2,1,3-benzothiadiazole copolymers and PC 61 BM blend. The 1,8-diiodooctane can work well to reduce the over-aggregated phase structure in polymer solar cells. Our results suggest that the introducing high hydrophilic side chain into conjugated polymer donor materials can tune the aggregation structure and improve the solar cells performances.

Water-soluble dinuclear iridium(iii) and ruthenium(ii) bis-terdentate complexes: photophysics and electrochemiluminescence

“…The synthetic routes for complexes 1-4 are illustrated in Scheme 1. The precursor compounds 2,7-bis (4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9-di(1-(2-(2-methoxyethoxy)ethoxy)ethyl)fluorene, 20,21 23 (4′-phenyl-2,2′:6′,2″-terpyridine)RuCl 3 , 24 and [1,3-di( pyrid-2-yl)-4,6-dimethylbenzene]Ru(CH 3 CN) 3 25 were prepared according to the established procedures. L1.…”

Fluorene Side-Chained Benzodithiophene Polymers for Low Energy Loss Solar Cells

“…As we all know, the fluorene unit has usually been used as electron-donating moiety to design D–A conjugated polymers due to its rigidity, high hole mobility, and highly conjugated structures. , Andersson’s group introduced the fluorene unit to design donor materials of PSCs . The resulting polymer PFDTBT exhibited good efficiency with PCE of 2.2%.…”