Quantitatively Analyzing the Influence of Side Chains on Photovoltaic Properties of Polymer−Fullerene Solar Cells

2010 ◽  
Vol 114 (39) ◽  
pp. 16793-16800 ◽  
Author(s):  
Liqiang Yang ◽  
Huaxing Zhou ◽  
Wei You
Keyword(s):  
Solar Cells ◽  
Side Chains ◽  
Photovoltaic Properties

scholarly journals Comparing Benzodithiophene Unit with Alkylthionaphthyl and Alkylthiobiphenyl Side-Chains in Constructing High-Performance Nonfullerene Solar Cells

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1673
Author(s):  
Ruyi Xie ◽  
Li Song ◽  
Zhihui Zhao
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Performance ◽  
Fill Factor ◽  
Power Conversion ◽  
Vertical Direction ◽  
Side Chains ◽  
Aromatic Rings ◽  
Photovoltaic Properties

Using single-bonded and fused aromatic rings are two methods for extending the π-conjugation in the vertical direction of benzo [1,2-b:4,5-b′] dithiophene (BDT) unit. To investigate which method is more efficient in nonfullerene systems, two novel polymers based on alkylthionaphthyl and alkylthiobiphenyl substituted BDT named PBDTNS-FTAZ and PBDTBPS-FTAZ are designed and synthesized. Two polymers only exhibit small differences in structure, but huge differences in photovoltaic properties. They are studied by blended with 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)indanone)-5,5,11,11-tetrakis(4-hexylphenyl)dithieno [2,3-d’:2,3’-d’]-s-indaceno [1,2-b:5,6-b’] dithiophene (ITIC). The device based on PBDTNS-FTAZ:ITIC showed the best power conversion efficiency (PCE) of 9.63% with the Voc of 0.87 V, a Jsc of 18.06 mA/cm2 and a fill factor of 61.21%, while the PBDTBPS-FTAZ:ITIC only exhibit a maximum PCE of 7.79% with a Voc of 0.86 V, a Jsc of 16.24 mA/cm2 and a relatively low fill factor of 55.92%. Therefore, extending π-conjugation with alkylthionaphthyl is more effective against constructing nonfullerene solar cells.

Synthesis and photovoltaic properties of two-dimensional benzodithiophene-thiophene copolymers with pendent rational naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole side chains

2015 ◽  
Vol 3 (46) ◽  
pp. 23149-23161 ◽  
Author(s):  
Xiaopeng Xu ◽  
Kui Feng ◽  
Kai Li ◽  
Qiang Peng
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Molecular Design ◽  
Polymer Solar Cells ◽  
Side Chains ◽  
Two Dimensional ◽  
Photovoltaic Properties ◽  
Solvent Vapour ◽  
Rational Molecular Design ◽  
Annealing Method

Rational molecular design of the conjugated side chains and the solvent vapour annealing method were employed in this work to develop high performance two-dimensional copolymer donors and their efficient polymer solar cells.

Synthesis and photovoltaic properties of an n-type two-dimension-conjugated polymer based on perylene diimide and benzodithiophene with thiophene conjugated side chains

2015 ◽  
Vol 3 (36) ◽  
pp. 18442-18449 ◽  
Author(s):  
Youdi Zhang ◽  
Qun Wan ◽  
Xia Guo ◽  
Wanbin Li ◽  
Bing Guo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymer ◽  
Polymer Solar Cells ◽  
Perylene Diimide ◽  
Side Chains ◽  
Two Dimensional ◽  
Stille Coupling ◽  
Photovoltaic Properties ◽  
Two Dimension

A novel n-type two-dimensional (2D) conjugated polymer based on bithienyl-benzodithiophene (BDT) and perylene diimide (PDI), P(PDI-BDT-T), is synthesized by Stille coupling for applications in all-polymer solar cells (PSCs).

scholarly journals Efficient Solar Cells Based on a Polymer Donor with β-Branching in Trialkylsilyl Side Chains

2021 ◽  
Vol 03 (02) ◽  
pp. 134-140
Author(s):  
Haijun Bin ◽  
Martijn M. Wienk ◽  
René A. J. Janssen
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Short Circuit ◽  
Energy Levels ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Side Chains ◽  
Photovoltaic Properties ◽  
Alkyl Groups ◽  
High Efficient

Side-chain engineering is an important strategy in designing novel polymer semiconductor materials for high-efficient organic solar cells. The use of trialkylsilyl side chains can improve the photovoltaic efficiency by decreasing the energy of the HOMO of the polymer and improving its crystallinity and hole mobility. Compared to simple linear derivatives, α-branching in the alkyl groups of trialkylsilyl side chains causes strong aggregation and excessive phase separation in the photoactive layer, leading to poor device performance. β-Branching of the alkyl groups has not yet been used in trialkylsilyl side chains. Herein, we describe a new polymer (J77) with triisobutylsilyl side chains to investigate the effect of β-branching on the molecular aggregation, optical properties, energy levels, and photovoltaic properties. We find that compared to α-branching, β-branching of alkyl groups in trialkylsilyl side chains significantly reduces aggregation. This enables J77 to form blend morphologies in films that provide high-efficient solar cells in combination with different non-fullerene acceptors. Moreover β-branching of the alkyl groups in trialkylsilyl side chains lowers the HOMO energy level of J77 and increases the open-circuit voltage of J77-based solar cells without sacrificing short-circuit current density or fill factor.

scholarly journals Synthesis and characterization of benzodithiophene and benzotriazole-based polymers for photovoltaic applications

2016 ◽  
Vol 12 ◽  
pp. 1629-1637 ◽  
Author(s):  
Desta Gedefaw ◽  
Marta Tessarolo ◽  
Margherita Bolognesi ◽  
Mario Prosa ◽  
Renee Kroon ◽  
...  
Keyword(s):  
Solar Cells ◽  
Bulk Heterojunction ◽  
Coupling Reaction ◽  
Side Chains ◽  
Photovoltaic Properties ◽  
Polymer Backbone ◽  
Heterojunction Solar Cells ◽  
Highest Occupied Molecular Orbital ◽  
Alkyl Side Chains

Two high bandgap benzodithiophene–benzotriazole-based polymers were synthesized via palladium-catalysed Stille coupling reaction. In order to compare the effect of the side chains on the opto-electronic and photovoltaic properties of the resulting polymers, the benzodithiophene monomers were substituted with either octylthienyl (PTzBDT-1) or dihexylthienyl (PTzBDT-2) as side groups, while the benzotriazole unit was maintained unaltered. The optical characterization, both in solution and thin-film, indicated that PTzBDT-1 has a red-shifted optical absorption compared to PTzBDT-2, likely due to a more planar conformation of the polymer backbone promoted by the lower content of alkyl side chains. The different aggregation in the solid state also affects the energetic properties of the polymers, resulting in a lower highest occupied molecular orbital (HOMO) for PTzBDT-1 with respect to PTzBDT-2. However, an unexpected behaviour is observed when the two polymers are used as a donor material, in combination with PC61BM as acceptor, in bulk heterojunction solar cells. Even though PTzBDT-1 showed favourable optical and electrochemical properties, the devices based on this polymer present a power conversion efficiency of 3.3%, considerably lower than the efficiency of 4.7% obtained for the analogous solar cells based on PTzBDT-2. The lower performance is presumably attributed to the limited solubility of the PTzBDT-1 in organic solvents resulting in enhanced aggregation and poor intermixing with the acceptor material in the active layer.

A polymeric bis(di-p-anisylamino)fluorene hole-transport material for stable n-i-p perovskite solar cells

2021 ◽  
Author(s):  
Marie-Hélène Tremblay ◽  
Kelly Schutt ◽  
Yadong Zhang ◽  
Stephen Barlow ◽  
Henry J. Snaith ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Heat Stability ◽  
Hole Transport ◽  
Side Chains ◽  
Hole Transporting

Half-devices made with a norbornene homopolymer with hole-transporting 2,7-bis(di-p-anisylamino)fluorene side chains exhibit improved light and heat stability in comparison to those incorporating spiro-OMeTAD.

scholarly journals Structure and photovoltaic properties of ZnO nanowire for dye-sensitized solar cells

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
Ming-Cheng Kao ◽  
Hone-Zern Chen ◽  
San-Lin Young ◽  
Chen-Cheng Lin ◽  
Chung-Yuan Kung
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Zno Nanowire ◽  
Photovoltaic Properties ◽  
Dye Sensitized ◽  
Sensitized Solar Cells
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