Over 17.5% Efficiency Ternary Organic Solar Cells with Enhanced Photon Utilization via a Medium Band Gap Non-Fullerene Acceptor

2021 ◽  
Author(s):  
Congcong Cao ◽  
Hanjian Lai ◽  
Hui Chen ◽  
Yulin Zhu ◽  
Mingrui Pu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Organic Solar Cells ◽  
Light Harvesting ◽  
Photovoltaic Performance ◽  
Photocurrent Generation ◽  
Medium Band

The light harvesting and photocurrent generation from acceptors largely determine the photovoltaic performance of organic solar cells (OSCs). We have designed and prepared two medium band gap non-fullerene acceptors (NFAs),...

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.

Simultaneously Enhancing the Jsc and Voc of Ternary Organic Solar Cells by Incorporating a Medium-Band-Gap Acceptor

2021 ◽  
Author(s):  
Min Zhang ◽  
Min Zeng ◽  
Xiong Deng ◽  
Zhijie Zhou ◽  
Xiaoxiao Tan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Organic Solar Cells ◽  
Medium Band

Low band gap disk-shaped donors for solution-processed organic solar cells

RSC Advances ◽  
2014 ◽  
Vol 4 (110) ◽  
pp. 64589-64595 ◽  
Author(s):  
Keisuke Takemoto ◽  
Mutsumi Kimura
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Organic Solar Cells ◽  
Light Harvesting ◽  
Solution Processed ◽  
Low Band Gap

Performance of pyrene-cored donors in BHJ solar cells is enhanced by introduction of rhodanine due to expansion of the light-harvesting area.

Band-gap-graded Cu2ZnSn(S,Se)4 drives high efficient solar cells

2022 ◽  
Author(s):  
Hongling Guo ◽  
Rutao Meng ◽  
Gang Wang ◽  
Shenghao Wang ◽  
Li Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Light Harvesting ◽  
Absorber Layer ◽  
Photovoltaic Application ◽  
High Efficient

Fabrication of high efficient solar cells is critical for photovoltaic application. The bandgap-graded absorber layer can not only drive carriers efficient collection but also improve the light harvesting. However, it...

scholarly journals Design and synthesis of low band gap non-fullerene acceptors for organic solar cells with impressively high Jsc over 21 mA cm_2

2017 ◽  
Vol 60 (9) ◽  
pp. 819-828 ◽  
Author(s):  
Huan-Huan Gao ◽  
Yanna Sun ◽  
Xiangjian Wan ◽  
Bin Kan ◽  
Xin Ke ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Organic Solar Cells ◽  
Low Band Gap ◽  
Design And Synthesis

Two-Dimensional BDT-Based Wide Band Gap Polymer Donor for Efficient Non-Fullerene Organic Solar Cells

2017 ◽  
Vol 121 (36) ◽  
pp. 19634-19641 ◽  
Author(s):  
Kai Zhang ◽  
Yunpeng Qin ◽  
Feng Li ◽  
Liangmin Yu ◽  
Mingliang Sun
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Organic Solar Cells ◽  
Wide Band ◽  
Two Dimensional ◽  
Wide Band Gap
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