Synthesis and Photophysical Properties of Side-Chain Polyfluorenes

2017 ◽  
Vol 865 ◽  
pp. 60-63
Author(s):  
Ning Wang ◽  
Xiao Dan Hu
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Photophysical Properties ◽  
Gel Permeation Chromatography ◽  
Blue Shift ◽  
Red Shift ◽  
Side Chain ◽  
Gel Permeation

In this paper, we reported one vinylfluorene derivative 9,9-dihexyl-vinylfluorene and its corresponding polymers. The monomer and polymers were characterized by NMR, UV-Vis, PL and Gel Permeation Chromatography (GPC). Compared with the monomer, the polymers showed blue-shift in UV-Vis spectra but red-shift in PL spedtra. This kind of side-chain polyfluorenes could be candidates of blue OLED, organic solar cells, and so on.

Fine-tuning of Side-chain Orientations on Nonfullerene Acceptors Enables Organic Solar Cells with 17.7% Efficiency

2021 ◽  
Author(s):  
Gaoda CHAI ◽  
Yuan Chang ◽  
Jianquan Zhang ◽  
Xiaopeng Xu ◽  
Liyang Yu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Fine Tuning ◽  
Side Chain

Side-chain engineering has been shown to be an important strategy to optimize Y-series nonfullerene acceptors (NFAs). Most previous reports were focusing on changing the branching positions and size of the...

Donor polymer based on alkylthiophene side chains for efficient non-fullerene organic solar cells: insights into fluorination and side chain effects on polymer aggregation and blend morphology

2018 ◽  
Vol 6 (46) ◽  
pp. 23270-23277 ◽  
Author(s):  
Jing Liu ◽  
Lik-Kuen Ma ◽  
Zhengke Li ◽  
Huawei Hu ◽  
Fu Kit Sheong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Synergistic Effects ◽  
Side Chain ◽  
Side Chains ◽  
Blend Morphology

The synergistic effects of overfluorination and alkylthiophene side chain strategies led to 10.60% efficiency for non-fullerene organic solar cells.

Side-chain influences on the properties of benzodithiophene-alt-di(thiophen-2-yl)quinoxaline polymers for fullerene-free organic solar cells

Polymer ◽  
2019 ◽  
Vol 172 ◽  
pp. 305-311 ◽  
Author(s):  
Vellaiappillai Tamilavan ◽  
Jihoon Lee ◽  
Ji Hyeon Kwon ◽  
Soyeong Jang ◽  
Insoo Shin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Side Chain

scholarly journals Triphenylamine-Based Push–Pull σ–C60 Dyad As Photoactive Molecular Material for Single-Component Organic Solar Cells: Synthesis, Characterizations, and Photophysical Properties

2018 ◽  
Vol 30 (10) ◽  
pp. 3474-3485 ◽  
Author(s):  
Antoine Labrunie ◽  
Julien Gorenflot ◽  
Maxime Babics ◽  
Olivier Alévêque ◽  
Sylvie Dabos-Seignon ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Photophysical Properties ◽  
Single Component ◽  
Molecular Material

scholarly journals Design of Thienothiophene-Based Copolymers with Various Side Chain-End Groups for Efficient Polymer Solar Cells

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2964
Author(s):  
Ying-Chieh Chao ◽  
Jhe-Han Chen ◽  
Yi-Jie Chiou ◽  
Po-lin Kao ◽  
Jhao-Lin Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Microphase Separation ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Photophysical Properties ◽  
Morphological Properties ◽  
Side Chain ◽  
Blend Films ◽  
End Groups ◽  
Thiophene Moiety

Three two-dimensional donor–acceptor conjugated copolymers consisting of a benzo[1,2-b:4,5-b′]dithiophene derivative and thieno[3,2-b]thiophene with a conjugated side chain were designed and synthesized for use in bulk heterojunction (BHJ) or nonfullerene polymer solar cells (PSCs). Through attaching various acceptor end groups to the conjugated side chain on the thieno[3,2-b]thiophene moiety, the electronic, photophysical, and morphological properties of these copolymers were significantly affected. It was found that the intermolecular charge transfer interactions were enhanced with the increase in the acceptor strength on the thieno[3,2-b]thiophene moiety. Moreover, a better microphase separation was obtained in the copolymer: PC71BM or ITIC blend films when a strong acceptor end group on the thieno[3,2-b]thiophene moiety was used. As a result, BHJ PSCs based on copolymer:PC71BM blend films as active layers exhibited power conversion efficiencies from 2.82% to 4.41%, while those of nonfullerene copolymer:ITIC-based inverted PSCs ranged from 6.09% to 7.25%. These results indicate the side-chain engineering on the end groups of thieno[3,2-b]thiophene unit through a vinyl bridge linkage is an effective way to adjust the photophysical properties of polymers and morphology of blend films, and also have a significant influence on devices performance.

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