Influence of polymer side chains on the photovoltaic performance of non-fullerene organic solar cells

2017 ◽  
Vol 5 (4) ◽  
pp. 937-942 ◽  
Author(s):  
Xue Gong ◽  
Guangwu Li ◽  
Shiyu Feng ◽  
Liangliang Wu ◽  
Yahui Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Organic Solar Cells ◽  
Photovoltaic Performance ◽  
Great Influence ◽  
Molecular Packing ◽  
Side Chains ◽  
Blend Morphology

The side chains of polymers had a great influence on their molecular packing, energy level, blend morphology and photovoltaic performance. The PCEs of 7.28% and 1.55% were obtained for alkoxy and alkylthio-substituted polymer based non-fullerene solar cells, respectively.

Green solvent-processed efficient non-fullerene organic solar cells enabled by low-bandgap copolymer donors with EDOT side chains

2019 ◽  
Vol 7 (2) ◽  
pp. 716-726 ◽  
Author(s):  
Chentong Liao ◽  
Ming Zhang ◽  
Xiaopeng Xu ◽  
Feng Liu ◽  
Ying Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Organic Solar Cells ◽  
Carrier Mobility ◽  
Side Chain ◽  
Ternary Blend ◽  
Side Chains ◽  
Green Solvent ◽  
Low Bandgap ◽  
Blend Morphology

By a combination of side chain and ternary blend strategies, novel BDT-TT-based copolymer donors were developed to improve the green solvent solubility, crystallinity, energy level, carrier mobility and blend morphology. Non-fullerene binary and ternary blend devices based on PTB-EDOTS exhibited high PCEs of 10.18% and 12.26%, respectively.

scholarly journals Effect of Side-Chain Variation on Single-Crystalline Structures for Revealing the Structure–Property Relationships of Organic Solar Cells

2020 ◽  
Vol 02 (01) ◽  
pp. 026-032
Author(s):  
Chen Yang ◽  
Liu Yuan ◽  
Ruimin Zhou ◽  
Zhen Wang ◽  
Jianqi Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Single Crystal ◽  
Crystal Structures ◽  
Organic Solar Cells ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Side Chains ◽  
Single Crystal Structures ◽  
Stacking Structure ◽  
Molecular Stacking

The molecular stacking assembly in the active layer plays a significant role in the photovoltaic performance of organic solar cells (OSCs). Here, we report two new small molecular donors with different side chains, FBT-O and FBT-H, and their corresponding fullerene-based OSCs. A slight change in the side chains led to a big difference in the power conversion efficiencies (PCEs). Although the molecular structures of the two donors are similar to each other, PCEs of the devices based on FBT-O were almost three times higher than those of the devices based on FBT-H, with manifold short-circuit current density, fill factor, as well as three orders of magnitude enhancement in the hole mobility. The difference in their single crystal structures was thoroughly investigated, whereby the FBT-O exhibited better planarity leading to appropriate phase separation and domain size. Furthermore, two-dimensional grazing-incidence wide-angle X-ray scattering results of the blend films revealed that the two donors retained a similar stacking structure as compared to the single-crystal structures, thus, establishing a clear relationship between the molecular stacking structure and the device performance.

The influence of the microstructure upon the photovoltaic performance of MDMOPPV: PCBM bulk hetero-junction organic solar cells

2002 ◽  
Vol 725 ◽  
Author(s):  
T. Martens ◽  
J. D'Haen ◽  
T. Munters ◽  
L. Goris ◽  
Z. Beelen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Photovoltaic Performance ◽  
Cross Sectional ◽  
3 Dimensional ◽  
Blend Morphology ◽  
Transmission Electron ◽  
Drying Conditions ◽  
Particle Statistics ◽  
Tem Transmission Electron Microscopy

AbstractIn this paper, a clear view on the bulk microstructure of MDMO-PPV:PCBM blends as used in bulk hetero-junction organic solar cells is obtained by means of TEM (Transmission Electron Microscopy). Using TEM, 3-dimensional information is acquired on phase separated regions, formed during casting. Particle statistics illustrate quantitatively that a.o. drying conditions and choice of solvent dramatically influence the blend structure. More information about the lateral blend structure and distribution is obtained in cross-sectional view. Since blend morphology is strongly related to photovoltaic performance, TEM can be a powerful tool for understanding today's photovoltaic performances and screening new sets of materials.

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.

scholarly journals An investigation of the role acceptor side chains play in the processibility and efficiency of organic solar cells fabricated from small molecular donors featuring 3,4-ethylenedioxythiophene cores

RSC Advances ◽  
2018 ◽  
Vol 8 (69) ◽  
pp. 39231-39240
Author(s):  
N. A. Mica ◽  
S. A. J. Almahmoud ◽  
L. Krishnan Jagadamma ◽  
G. Cooke ◽  
I. D. W. Samuel
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Chemical Nature ◽  
Photovoltaic Performance ◽  
Side Chain ◽  
Side Chains ◽  
Acceptor Side

The chemical nature of the acceptor side chain plays an important role in the processability and photovoltaic performance of EDOT-based small molecule donors.

Effect of Non-fullerene Acceptors’ Side Chains on the Morphology and Photovoltaic Performance of Organic Solar Cells

2017 ◽  
Vol 9 (39) ◽  
pp. 33906-33912 ◽  
Author(s):  
Cai’e Zhang ◽  
Shiyu Feng ◽  
Yahui Liu ◽  
Ran Hou ◽  
Zhe Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Photovoltaic Performance ◽  
Side Chains

The effect of alkylthio side chains in oligothiophene-based donor materials for organic solar cells

2018 ◽  
Vol 3 (1) ◽  
pp. 131-141 ◽  
Author(s):  
Yan Zou ◽  
Yue Wu ◽  
Hang Yang ◽  
Yingying Dong ◽  
Chaohua Cui ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Solar Cells ◽  
Energy Level ◽  
Small Molecules ◽  
Organic Solar Cells ◽  
Side Chains ◽  
Homo Energy ◽  
Backbone Conformation ◽  
Molecular Backbone ◽  
Homo Energy Level

The engineering of alkylthio side chains in the molecular conjugated backbone of small molecules is in favor of achieving a linear molecular backbone conformation, slightly red-shifting the absorption spectrum, and down-shifting the HOMO energy level of the resulting molecule.

Molecular packing modulation enabling optimized blend morphology and efficient all small molecule organic solar cells

2021 ◽  
Vol 191 ◽  
pp. 109387
Author(s):  
Yuwei Duan ◽  
Xiaopeng Xu ◽  
Liyang Yu ◽  
Ying Li ◽  
Ruipeng Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Molecular Packing ◽  
Blend Morphology

Effects of energy-level offset between a donor and acceptor on the photovoltaic performance of non-fullerene organic solar cells

2019 ◽  
Vol 7 (32) ◽  
pp. 18889-18897 ◽  
Author(s):  
Chenyi Yang ◽  
Jianqi Zhang ◽  
Ningning Liang ◽  
Huifeng Yao ◽  
Zhixiang Wei ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Organic Solar Cells ◽  
Photovoltaic Performance ◽  
Donor And Acceptor

This work discussed the effect of energy-level offset on photovoltaic performance of PBDB-TF-based non-fullerene OSCs and established a correlation between them.

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