A new non-fullerene acceptor based on the combination of a heptacyclic benzothiadiazole unit and a thiophene-fused end group achieving over 13% efficiency

Physical Chemistry Chemical Physics, Journal Year: 2019, Volume and Issue: 21(48), P. 26557 - 26563

Published: Jan. 1, 2019

A new non-fullerene acceptor, namely Y10, based on dithienothiophen[3,2-b]-pyrrolobenzothiadiazole (TPBT) as the central core and 2-(6-oxo-5,6-dihydro-4H-cyclopenta[c]thiophen-4-ylidene)malononitrile (TC) electron-deficient end group, has been designed synthesized. Y10 reveals a narrow optical energy gap (Eoptg) of 1.35 eV with broad absorption band from 600 to 900 nm. wide bandgap polymer, J11, donor material (Eoptg = 1.96 eV) is used blend for construction organic solar cell devices, which achieve an impressive power conversion efficiency (PCE) 13.46% open circuit voltage (Voc) 0.89 V, short current (Jsc) 21.21 mA cm-2, fill factor (FF) 71.55%, thermal annealing treatment at 100 °C 5 min 0.8 wt% 1-chloronaphthalene (CN) additive. These results indicate that incorporation TPBT unit TC group provides efficient strategy high performance cells.

Language: Английский

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Screening Quinoxaline-Type Donor Polymers for Roll-to-Roll Processing Compatible Organic Photovoltaics

ACS Applied Polymer Materials, Journal Year: 2019, Volume and Issue: 1(8), P. 2168 - 2176

Published: June 28, 2019

We demonstrate, by screening a library of four derivatives benzodithiophene–quinoxaline (BDT-QX)-based polymer, that BDT-QX are donor polymer candidates for large-scale coating organic photovoltaic (OPV) active layers. Our study shows pairing them with twisted N-annulated perylene diimide (PDI) dimer, which solid-state aggregation can be induced via diphenyl ether (DPE) solvent additive, yields OPV devices power conversion efficiency (PCE) over 5%. The layers, both spin-coated (from o-xylenes and o-methylanisole) slot-die-coated o-xylenes), maintain high open-circuit voltage (Voc) 1 V fill factor (FF) ca. 60%, maximum PCE respectively 6.07 4.11%, show promise compatibility roll-to-roll, non-halogenated processing devices.

Language: Английский

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PTB7 and PTB7-Th as universal polymers to evaluate materials development aspects of organic solar cells including interfacial layers, new fullerenes, and non-fullerene electron acceptors

Synthetic Metals, Journal Year: 2022, Volume and Issue: 287, P. 117088 - 117088

Published: June 3, 2022

Language: Английский

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Near-IR absorption and photocurrent generation using a first-of-its-kind boron difluoride formazanate non-fullerene acceptor

Materials Chemistry Frontiers, Journal Year: 2020, Volume and Issue: 4(6), P. 1643 - 1647

Published: Jan. 1, 2020

We report the synthesis and characterization of first non-fullerene acceptor containing a boron difluoride formazanate core end-capped with N-annulated perylene diimides.

Language: Английский

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Highly thermo- and photo-stable acceptor-acceptor′-acceptor type perylenediimide dimeric acceptors: Role of monofluorinating the central benzo[c][1,2,5]thiadiazole linking core

Materials Today Communications, Journal Year: 2024, Volume and Issue: 40, P. 110016 - 110016

Published: July 31, 2024

Language: Английский

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