New acceptor–donor–acceptor-type conjugated molecules bearing naphtho[1,2-b:5,6-b′]dithiophene and (E)-1,2-di(thiophen-2-yl)ethene and their applications in thin-film transistors and photovoltaic cells

Lee, Tae Wan; Lee, Dong Hoon; Hong, Tae Ryang; Shin, Jicheol; Cho, Min Ju; Choi, Dong Hoon

doi:10.1016/j.synthmet.2015.05.005

Cited by 9 publications

(1 citation statement)

References 29 publications

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“…Ultimately, the devices only present a low PCE of 2.21% due to low J SC . 86 Besides the roles aforementioned, the TVT unit was also used as a p-bridge to construct small molecular donors. For example, Zhu et al obtained two isomeric A-D-A type SMs G16 and G17, which contain different electron-donating units 2,6substituted BDT (BDTx) and 4,8-substituted BDT (BDTy), same electron-withdrawing unit DPP, and the TVT bridge.…”

Section: Tvt-based P-type Materialsmentioning

confidence: 99%

Conjugated polymers and small molecules containing the thiophene–vinylene–thiophene (TVT) unit for organic photovoltaic applications

Wang¹,

Lei²,

Dong³

et al. 2023

J. Mater. Chem. A

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Section: Tvt-based P-type Materialsmentioning

confidence: 99%

Conjugated polymers and small molecules containing the thiophene–vinylene–thiophene (TVT) unit for organic photovoltaic applications

Wang¹,

Lei²,

Dong³

et al. 2023

J. Mater. Chem. A

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Design of Diketopyrrolopyrrole (DPP)‐Based Small Molecules for Organic‐Solar‐Cell Applications

et al. 2016

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After the first report in 2008, diketopyrrolopyrrole (DPP)-based small-molecule photovoltaic materials have been intensively explored. The power conversion efficiencies (PCEs) for the DPP-based small-molecule donors have been improved up to 8%. Furthermore, through judicious structure modification, DPP-based small molecules can also be converted into electron-acceptor materials, and, recently, some exciting progress has been achieved. The development of DPP-based photovoltaic small molecules is summarized here, and the photovoltaic performance is discussed in relation to structural modifications, such as the variations of donor-acceptor building blocks, alkyl substitutions, and the type of conjugated bridges, as well as end-capped groups. It is expected that the discussion will provide a guideline in the exploration of novel and promising DPP-containing photovoltaic small molecules.

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Synthesis, Characterization and Photovoltaic Properties of Electron‐Accepting (11‐Oxoanthra[2,1‐b]thiophen‐6‐ylidene)dipropanedinitrile‐Based Molecules

et al. 2021

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Two acceptor small molecules consisting of 2-(11-oxoanthra [2,1-b]thiophen-6-ylidene)dipropanedinitrile frameworks connected by a bis(thiophen-2-ylethynyl)arene bridge were synthesized by the two-step sequence of Sonogashira cross-coupling and Knoevenagel condensation in order to investigate their performance as non-fullerene acceptors in organic solar cells. Optical, electrochemical and photovoltaic properties of new 2,2'-[2,2'-(5,5'-(arenediyl)bis(ethyne-2,1-diyl)bis(thien-5,2-diyl)) bis(11-oxoanthra[2,1-b]thiophen-6-ylidene)]dipropanedinitriles and previously studied analogs of 2,2'-[2,2'-arenediylbis(11oxoanthra[1,2-b]thiophene-6-ylidene)]dipropanedinitriles were compared to assess the effect of introducing ethynylthiophene units between the arene linker and the 2-(11-oxoanthrathio-phen-6-ylidene)propanedinitrile units. Despite the proper energy level alignment and morphology, composites of the newly synthesized compounds with the PBDB-T donor polymer demonstrate a moderate PCE of 0.54 %. The small value of the short circuit current as compared to composites with fullerene acceptors is probably due to the low electron mobility in the newly synthesized compounds. The low electron mobility, in turn, is probably cause by the LUMO localization at the edge units of the acceptor-type molecules, in contrast to the almost uniform LUMO delocalization over the whole π-conjugated system for high-performing non-fullerene acceptors such as ITIC.

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New acceptor–donor–acceptor-type conjugated molecules bearing naphtho[1,2-b:5,6-b′]dithiophene and (E)-1,2-di(thiophen-2-yl)ethene and their applications in thin-film transistors and photovoltaic cells

Cited by 9 publications

References 29 publications

Conjugated polymers and small molecules containing the thiophene–vinylene–thiophene (TVT) unit for organic photovoltaic applications

Conjugated polymers and small molecules containing the thiophene–vinylene–thiophene (TVT) unit for organic photovoltaic applications

Design of Diketopyrrolopyrrole (DPP)‐Based Small Molecules for Organic‐Solar‐Cell Applications

Synthesis, Characterization and Photovoltaic Properties of Electron‐Accepting (11‐Oxoanthra[2,1‐b]thiophen‐6‐ylidene)dipropanedinitrile‐Based Molecules

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