scholarly journals New cyclopentadithiophene (CDT) linked porphyrin donors with different end-capping acceptors for efficient small molecule organic solar cells

2017 ◽  
Vol 5 (19) ◽  
pp. 4742-4751 ◽  
Author(s):  
Susana Arrechea ◽  
Ana Aljarilla ◽  
Pilar de la Cruz ◽  
Manish Kumar Singh ◽  
Ganesh D. Sharma ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
End Capping

Using cyclopentadithiophene as bridge in A–D–A porphyrin-based small molecules, and PC71BM as acceptor in BHJ solar cells PCE of 7.93%, is achieved after SVA.

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.

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.

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.

Assessing the Effects of Increasing Conjugation Length on Exciton Diffusion: From Small Molecules to the Polymeric Limit

2021 ◽  
Author(s):  
Leonardo E de Sousa ◽  
Laura Simonassi Raso de Paiva ◽  
DEMETRIO DA SILVA FILHO ◽  
Gjergji Sini ◽  
Pedro Henrique Neto
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Conjugation Length ◽  
Exciton Diffusion ◽  
Pi Conjugated ◽  
Pi Conjugated Polymers ◽  
Long Chain

Organic solar cells (OSC) generally contain long-chain $\pi$-conjugated polymers as donor materials, but, more recently, small-molecule donors have also attracted considerable attention. The nature of these compounds is of crucial...

scholarly journals Nonfullerene Small-Molecule Acceptors with Extended Optical Absorption Based on the “Spliced” Strategy for Organic Solar Cells

2019 ◽  
Vol 01 (01) ◽  
pp. 071-077
Author(s):  
Di Zhou ◽  
Zhilin Liu ◽  
Dangqiang Zhu ◽  
Xiyue Yuan ◽  
Xichang Bao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Optical Absorption ◽  
Band Gap ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Performance ◽  
Photovoltaic Performance ◽  
Wide Band ◽  
End Capping ◽  
New Perspective

How to broaden the optical absorption of photovoltaic materials is one of the key issues in the design of high-performance organic solar cells. Nowadays, the sunlight of 400–550 nm wavelength range is not effectively utilized for most small-molecule nonfullerene acceptors. In this work, we proposed the “spliced” strategy of combining the acceptor–donor–acceptor type narrow band-gap small molecules and wide-band-gap perylene diimide (PDI) moieties via a flexible alkyl chain linkage, which could give the superposition effect of the absorption spectra, and three small-molecule acceptors (S1, S2, and S3) were designed based on various end-capping groups with different electron withdrawing abilities. Encouragingly, the as-constructed molecules can well make use of 400–550 nm sunlight with two independent absorption regions. Meanwhile, the aggregation of S1 with a highly planar end-capping group was dominated by both the PDI unit and main skeleton, while S2 and S3 exhibited PDI-controlled aggregation. When fabricated into organic solar cells, S1-based devices achieved a superior efficiency of 3.41% in comparison with those of the other two. The poor photovoltaic performance could be attributed to severe PDI aggregation, which can hinder the charge transfer through the main skeletons. This work could provide a new perspective to modulate optical absorption through the spliced strategy.

Synthesis, characterization and photovoltaic properties of benzo[1,2-b:4,5-b′]dithiophene-bridged molecules

RSC Advances ◽  
2014 ◽  
Vol 4 (108) ◽  
pp. 63260-63267 ◽  
Author(s):  
Xinli Liu ◽  
Shusheng Li ◽  
Jinhua Li ◽  
Jian Wang ◽  
Zhan'ao Tan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Organic Solar Cells ◽  
Photovoltaic Properties ◽  
End Capping

Four benzo[1,2-b:4,5-b′]dithiophene (BDT) centred small molecules with different acceptor and end-capping groups were synthesized as the donor materials for organic solar cells.

Efficient chemical structure and device engineering for achieving difluorinated 2,2′-bithiophene-based small molecular organic solar cells with 9.0% efficiency

2018 ◽  
Vol 6 (26) ◽  
pp. 12493-12505 ◽  
Author(s):  
Min Li ◽  
Zhongbin Qiu ◽  
Guangjun Zhang ◽  
Yu Liu ◽  
Lin Xiong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Electron Acceptor ◽  
Organic Solar Cells ◽  
Chemical Structure ◽  
Narrow Band ◽  
Single Layer ◽  
End Capping ◽  
Optimized Conditions ◽  
Very High

Three novel narrow band gap small molecules (SMs) with D(A–Ar)2 molecular frameworks, based on fluorinated 2,2′-bithiophene (FBT) as an electron-donating (D) central core coupled with different electron-acceptor (A) bridge units, and 2-octylthiophene (Ar) units as end-capping units, were designed and synthesized for application as donor materials in solution-processed SM-OSCs. Under optimized conditions, a high PCE of 9.00% with a very high Jsc of 16.14 mA cm−2 and a FF of 73.52% for FBT(TDPP-T)2/PC71BM is obtained in single layer OSCs, which is among the highest reported for D(A–Ar)2-type SM based solar cells with a PCE up to 9% so far.

Phenothiazine-based small-molecule organic solar cells with power conversion efficiency over 7% and open circuit voltage of about 1.0 V using solvent vapor annealing

2018 ◽  
Vol 20 (9) ◽  
pp. 6321-6329 ◽  
Author(s):  
Yogajivan Rout ◽  
Rajneesh Misra ◽  
Rahul Singhal ◽  
Subhayan Biswas ◽  
Ganesh D. Sharma
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Open Circuit ◽  
Solvent Vapor ◽  
Heterojunction Solar Cells ◽  
Vapor Annealing ◽  
Solvent Vapor Annealing

We have used two unsymmetrical small molecules with a D–A–D–π–D configuration as small molecule donors, along with PC71BM as an acceptor, for solution processed bulk heterojunction solar cells.

Sign in / Sign up

Export Citation Format

Share Document