Synthesis and photovoltaic properties of a low bandgap donor–acceptor alternating copolymer with benzothiadiazole unit

2011 ◽  
Vol 95 (12) ◽  
pp. 3295-3302 ◽  
Author(s):  
Tzong-Liu Wang ◽  
An-Chi Yeh ◽  
Chien-Hsin Yang ◽  
Yeong-Tarng Shieh ◽  
Wen-Janq Chen ◽  
...  
Keyword(s):  
Photovoltaic Properties ◽  
Low Bandgap ◽  
Alternating Copolymer ◽  
Donor Acceptor

scholarly journals Effect of Extended π-Conjugation of Central Cores on Photovoltaic Properties of Asymmetric Wide-Bandgap Nonfullerene Acceptors

2020 ◽  
Vol 02 (02) ◽  
pp. 173-181
Author(s):  
Tian Xia ◽  
Chao Li ◽  
Hwa Sook Ryu ◽  
Xiaobo Sun ◽  
Han Young Woo ◽  
...  
Keyword(s):  
Organic Solar Cells ◽  
Power Conversion ◽  
Wide Bandgap ◽  
Molecular Structures ◽  
Effective Strategy ◽  
Conjugation Length ◽  
Photovoltaic Properties ◽  
Low Bandgap ◽  
Donor Acceptor ◽  
Optical Bandgaps

Tremendous efforts have been dedicated to develop low-bandgap nonfullerene acceptors (NFAs) for organic solar cells (OSCs). In comparison, the NFAs with a wide bandgap (WBG) have received less attention. Here, three novel acceptor–donor–acceptor type WBG NFAs (TPT-T, TPTT-T, and TPTTT-T) have been designed and synthesized with different fused central cores by varying the π-conjugation length and molecular structures, which all exhibit wide optical bandgaps over 1.8 eV. The successive π-conjugation extension of electron-donating central cores (from TPT-T to TPTT-T and to TPTTT-T) induces red-shifted absorption spectra, lower optical bandgap, and enhanced electron mobility simultaneously. As a result, the optimized OSC devices based on TPTTT-T:PBT1-C achieved a power conversion efficiency of 7.42%, which was higher than those of PBT1-C:TPTT-T (6.93%) and PBT1-C:TPT-T (6.11%) based devices. These results indicate that extending the molecular π-conjugation structure is an effective strategy to design efficient NFAs for OSCs.

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.

Synthesis, characterization, and photovoltaic properties of a low-bandgap copolymer based on 2,1,3-benzooxadiazole

2011 ◽  
Vol 47 (31) ◽  
pp. 8877 ◽  
Author(s):  
Jian-Ming Jiang ◽  
Po-An Yang ◽  
Hsiu-Cheng Chen ◽  
Kung-Hwa Wei
Keyword(s):  
Photovoltaic Properties ◽  
Low Bandgap

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

Photovoltaic properties of novel thiophene- and selenophene-based conjugated low bandgap polymers: a comparative study

2017 ◽  
Vol 41 (14) ◽  
pp. 6315-6321 ◽  
Author(s):  
Young Nam Lee ◽  
Pankaj Attri ◽  
Seong Su Kim ◽  
Sang Jun Lee ◽  
Jun Heon Kim ◽  
...  
Keyword(s):  
Comparative Study ◽  
Conjugated Polymers ◽  
Photovoltaic Properties ◽  
Low Bandgap

We investigated the photovoltaic properties of two newly synthesized low bandgap conjugated polymers, thiophene-based P1 and selenophene-based P2.

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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