Cyclohexyl-substituted Non-fullerene Small-molecule Acceptors for Organic Solar Cells

2021 ◽  
Author(s):  
Seunggyun Hong ◽  
Chang Eun Song ◽  
Du Hyeon Ryu ◽  
Sang Kyu Lee ◽  
Won Suk Shin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
End Groups ◽  
Molecular Backbone

In this paper, two cyclohexyl-substituted non-fullerene small molecules, T2-Cy6MRH and T2-Cy6PRH, are designed to have the same molecular backbone of a bithiophene (T2) core and rhodanine (RH) end groups. T2-Cy6MRH...

scholarly journals The Effects of Molecular Packing Behavior of Small-Molecule Acceptors in Ternary Organic Solar Cells

2021 ◽  
Vol 11 (2) ◽  
pp. 755
Author(s):  
Eunhee Lim
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Ternary System ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Orbital Energy ◽  
Working Mechanism ◽  
Energy Level Structure ◽  
The Third ◽  
Molecular Backbone

Herein, two diketopyrrolopyrrole (DPP)-based, small-molecule isomers, o- and p-DPP-PhCN, were introduced as acceptors in ternary organic solar cells (OSCs). The isomers have the same molecular backbone but differ in the positions of the cyanide (CN) substituents (ortho and para), which greatly affects their packing behavior. Ternary solar cells composed of poly(3-hexylthiophene) (P3HT):DPP-PhCN:phenyl-C61-butyric acid methyl ester (PCBM) were fabricated, and the effects of the different packing behaviors of the third component on the device performance and the working mechanism of the ternary cells were investigated. The addition of o-DPP-PhCN with a relatively high-lying lowest unoccupied molecular orbital energy level resulted in an increase in the open-circuit voltage (VOC) in the ternary devices, demonstrating the alloy-like structure of the two acceptors (o-DPP-PhCN and PCBM) in the ternary system. However, the p-DPP-PhCN-based ternary cells exhibited VOC values similar to that of a P3HT:PCBM binary cell, irrespective of the addition of p-DPP-PhCN, indicating a cascade energy-level structure in the ternary system and an effective charge transfer from the P3HT to the PCBM. Importantly, by increasing the addition of p-DPP-PhCN, the short-circuit current density increased substantially, resulting in pronounced shoulder peaks in the external quantum efficiency responses in the long-wavelength region, corresponding to the contribution of the photocurrent generated by the light absorption of p-DPP-PhCN. Despite sharing the same molecular backbone, the two DPP-PhCNs exhibited substantially different packing behaviors according to the position of their CN substituents, which also greatly affected the working mechanism of the ternary devices fabricated using the DPP-PhCNs as the third component.

scholarly journals A “roller-wheel” Pt-containing small molecule that outperforms its polymer analogs in organic solar cells

2016 ◽  
Vol 7 (9) ◽  
pp. 5798-5804 ◽  
Author(s):  
Wenhan He ◽  
Maksim Y. Livshits ◽  
Diane A. Dickie ◽  
Jianzhong Yang ◽  
Rachel Quinnett ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Enhanced Crystallinity

“Roller-wheel” shaped Pt-containing molecules display enhanced crystallinity and are better performing organic solar cell materials than conventional small molecules and polymers featuring “dumbbell” shaped structures.

Highly efficient halogen-free solvent processed small-molecule organic solar cells enabled by material design and device engineering

2017 ◽  
Vol 10 (8) ◽  
pp. 1739-1745 ◽  
Author(s):  
Jiahui Wan ◽  
Xiaopeng Xu ◽  
Guangjun Zhang ◽  
Ying Li ◽  
Kui Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Material Design ◽  
Small Energy ◽  
Highly Efficient ◽  
Device Engineering ◽  
Halogen Free

Naphtho[1,2-c:5,6-c']bis[1,2,5]thiadiazole-based small molecules have been synthesized for organic solar cells. The optimized devices processed by a halogen-free solvent of CS2 exhibited a PCE of 11.53% with a small energy loss of 0.57 eV.

Terminal moiety-driven electrical performance of asymmetric small-molecule-based organic solar cells

2016 ◽  
Vol 4 (40) ◽  
pp. 15688-15697 ◽  
Author(s):  
Jianhua Huang ◽  
Shanlin Zhang ◽  
Bo Jiang ◽  
Yuxia Chen ◽  
Xinliang Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Electrical Performance ◽  
Alternative Choice

With respect to the successes from symmetric small molecules, asymmetric ones have recently emerged as an alternative choice.

Efficient modulation of end groups for the asymmetric small molecule acceptors enabling organic solar cells with over 15% efficiency

2020 ◽  
Vol 8 (12) ◽  
pp. 5927-5935 ◽  
Author(s):  
Gang Li ◽  
Dandan Li ◽  
Ruijie Ma ◽  
Tao Liu ◽  
Zhenghui Luo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
End Groups

Three asymmetric SMAs based on dithieno[3,2-b:2′,3′-d]pyrrole that exhibit a high efficiency of 15.31%, which is the highest value in asymmetric acceptor-based binary organic solar cells.

Dialkoxyphenyldithiophene-based small molecules with enhanced absorption for solution processed organic solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60595-60601 ◽  
Author(s):  
Junjue Zhao ◽  
Benzheng Xia ◽  
Kun Lu ◽  
Dan Deng ◽  
Liu Yuan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Organic Solar Cells ◽  
Photovoltaic Device ◽  
Organic Photovoltaic ◽  
Solution Processed ◽  
Enhanced Absorption ◽  
Organic Photovoltaic Device ◽  
Molecular Backbone

Breaking of BDT to form PDT units enhanced the planarity of the molecular backbone and absorption. The resulting organic photovoltaic device showed a highest PCE of 6.64% with a high Jsc of 12.74 mA cm−2.

Strategic end-halogenation of π-conjugated small molecules enabling fine morphological control and enhanced performance of organic solar cells

2019 ◽  
Vol 7 (24) ◽  
pp. 14806-14815 ◽  
Author(s):  
Seiichi Furukawa ◽  
Takuma Yasuda
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Morphological Properties ◽  
Morphological Control

A novel family of photovoltaic small-molecule donors having the same conjugated backbone but different terminal halogen groups (F, Cl, Br, and I) are developed, and the impacts of end-halogenation on the photovoltaic and morphological properties are systematically investigated.

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.

Solution processable low bandgap small molecule donors with naphthalene end-groups for organic solar cells

2012 ◽  
Vol 162 (17-18) ◽  
pp. 1665-1671 ◽  
Author(s):  
Ying Liu ◽  
Xiaoyan Du ◽  
Zuo Xiao ◽  
Jiamin Cao ◽  
Songting Tan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Low Bandgap ◽  
End Groups ◽  
Solution Processable

Cyclopentadithiophene organic core in small molecule organic solar cells: morphological control of carrier recombination

2017 ◽  
Vol 19 (5) ◽  
pp. 3640-3648 ◽  
Author(s):  
Rocío Domínguez ◽  
Núria F. Montcada ◽  
Pilar de la Cruz ◽  
Emilio Palomares ◽  
Fernando Langa
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Small Molecule ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Organic Solar Cells ◽  
Solution Processed ◽  
Morphological Control ◽  
Carrier Recombination

Two new planar and symmetrical A–D–A (electron acceptor–electron donor–electron acceptor) small molecules based on a commercial cyclopentadithiophene derivative have been synthesized for solution processed small molecule organic solar cells.

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