Synergistic effects of an alkylthieno[3,2-b]thiophene π-bridging backbone extension on the photovoltaic performances of donor–acceptor copolymers

2017 ◽  
Vol 5 (21) ◽  
pp. 10269-10279 ◽  
Author(s):  
Hyeongjin Hwang ◽  
Dong Hun Sin ◽  
Chandramouli Kulshreshtha ◽  
Byungho Moon ◽  
Jiwon Son ◽  
...  
Keyword(s):  
Synergistic Effects ◽  
Photovoltaic Properties ◽  
Donor Acceptor ◽  
Conjugated Copolymers

Synergistic effects of a thiophene-based π-bridging backbone extension on the photovoltaic properties of the conjugated copolymers were systematically studied.

Indeno[1,2-b]fluorene-based novel donor–acceptor conjugated copolymers

2017 ◽  
Vol 30 (2) ◽  
pp. 192-201 ◽  
Author(s):  
Ying Sun ◽  
Xiaojing Ding ◽  
Xueqin Zhang ◽  
Qizan Huang ◽  
Baoping Lin ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Hole Mobility ◽  
Molecular Geometry ◽  
Strong Electron ◽  
Photovoltaic Properties ◽  
Polymer Backbone ◽  
Photovoltaic Efficiency ◽  
Donor Acceptor ◽  
Electron Deficiency ◽  
Conjugated Copolymers

A series of conjugated copolymers based on indeno[1,2-b]fluorene as donor unit with different acceptor units have been synthesized to explore the influences of molecular backbone planarization and acceptor electronegativity on charge transport and photovoltaic properties. Polymer incorporating 2,3-diphenylquinoxaline acceptor moiety shows poor light-harvesting capacity and inferior photovoltaic efficiency of 0.5% due to twisted geometry. By introducing the stronger acceptor thiadiazolo[3,4-c]pyridine in polymer, intramolecular charge transfer is enhanced, giving rise to improved absorption property and photovoltaic efficiency of 1.39%. However, the polymer backbone is still twisted. When thiophene-flanked diketopyrrolopyrrole (DPP) is incorporated as electron acceptor, the polymer exhibits a more planar molecular geometry, yielding a broader and red-shifted absorption spectrum as well as a significantly improved hole mobility of 1.46E-2 cm2 V−1 s−1. However, the photovoltaic device efficiency is only enhanced to be 1.69%. The low-lying lowest unoccupied molecular orbital of −3.95 eV as a result of the strong electron deficiency of the DPP unit may lead to the inefficient charge dissociation and increase the charge recombination, which may give rise to the limit photovoltaic performance.

Synthesis, photophysical properties, and computational studies of benzothiadiazole and/or phenothiazine based donor/acceptor π-conjugated copolymers

2021 ◽  
Vol 28 (7) ◽  
Author(s):  
Ashraf A. El-Shehawy ◽  
Morad M. El-Hendawy ◽  
Adel M. Attia ◽  
Abdul-Rahman I. A. Abdallah ◽  
Nabiha I. Abdo
Keyword(s):  
Photophysical Properties ◽  
Computational Studies ◽  
Donor Acceptor ◽  
Conjugated Copolymers

scholarly journals Efficient Inverted Solar Cells Using Benzotriazole-Based Small Molecule and Polymers

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 393
Author(s):  
Ja Eun Lee ◽  
Yoon Kim ◽  
Yang Ho Na ◽  
Nam Seob Baek ◽  
Jae Woong Jung ◽  
...  
Keyword(s):  
Solar Cell ◽  
Conjugated Polymers ◽  
Power Conversion ◽  
High Energy ◽  
Photovoltaic Properties ◽  
Device Structures ◽  
Donor Acceptor ◽  
Medium Band ◽  
Inverted Solar Cell ◽  
Conventional Device

We synthesized medium-band-gap donor-acceptor (D-A) -type conjugated polymers (PBTZCZ-L and PBTZCZ-H) consisting of a benzotriazole building block as an acceptor and a carbazole unit as a donor. In comparison with the polymers, a small conjugated molecule (BTZCZ-2) was developed, and its structural, thermal, optical, and photovoltaic properties were investigated. The power conversion efficiency (PCE) of the BTZCZ-2-based solar cell devices was less than 0.5%, considerably lower than those of polymer-based devices with conventional device structures. However, inverted solar cell devices configured with glass/ITO/ZnO:PEIE/BTZCZ-2:PC71BM/MoO3/Ag showed a tremendously improved efficiency (PCE: 5.05%, Jsc: 9.95 mA/cm2, Voc: 0.89 V, and FF: 57.0%). We believe that this is attributed to high energy transfer and excellent film morphologies.

Syntheses and Photovoltaic Properties of Narrow Band Gap Donor–Acceptor Copolymers with Carboxylate-Substituted Benzodithiophene as Electron Acceptor Unit

2014 ◽  
Vol 47 (15) ◽  
pp. 4987-4993 ◽  
Author(s):  
Kosuke Shibasaki ◽  
Kenichi Tabata ◽  
Yohei Yamamoto ◽  
Takeshi Yasuda ◽  
Masashi Kijima
Keyword(s):  
Band Gap ◽  
Electron Acceptor ◽  
Narrow Band ◽  
Photovoltaic Properties ◽  
Donor Acceptor

Roles of Quinoidal Character and Regioregularity in Determining the Optoelectronic and Photovoltaic Properties of Conjugated Copolymers

2014 ◽  
Vol 47 (18) ◽  
pp. 6252-6259 ◽  
Author(s):  
Tianyue Zheng ◽  
Luyao Lu ◽  
Nicholas E. Jackson ◽  
Sylvia J. Lou ◽  
Lin X. Chen ◽  
...  
Keyword(s):  
Photovoltaic Properties ◽  
Conjugated Copolymers

Vinylidenedithiophenmethyleneoxindole-based donor-acceptor copolymers with 1D and 2D conjugated backbones: Synthesis, characterization, and their photovoltaic properties

2017 ◽  
Vol 144 ◽  
pp. 1-8 ◽  
Author(s):  
Weifeng Zhang ◽  
Yuqian Sun ◽  
Congyuan Wei ◽  
Zuzhang Lin ◽  
Hao Li ◽  
...  
Keyword(s):  
Photovoltaic Properties ◽  
Donor Acceptor

Synthesis and photovoltaic properties of A–D–A type non-fullerene acceptors containing isoindigo terminal units

RSC Advances ◽  
2015 ◽  
Vol 5 (130) ◽  
pp. 107566-107574 ◽  
Author(s):  
Xin Liu ◽  
Yuan Xie ◽  
Xinyi Cai ◽  
Yunchuan Li ◽  
Hongbin Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Organic Molecules ◽  
Photovoltaic Properties ◽  
Donor Acceptor ◽  
Solution Processable ◽  
Terminal Units

Four solution-processable acceptor–donor–acceptor structured organic molecules with isoindigo as terminal acceptor units and different aromatic rigid planar cores as donor units were designed and synthesized as the acceptor materials in organic solar cells (OSCs).

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