A–D–C–D–A Type Non-fullerene Acceptors Based on the Benzotriazole (BTA) Unfused Core for Organic Solar Cells

2021 ◽  
Author(s):  
Jinfeng Huang ◽  
Cai-Yan Gao ◽  
Xin-Heng Fan ◽  
Xiaozhang Zhu ◽  
Lian-Ming Yang
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Organic Solar Cells ◽  
Halogen Atoms ◽  
Efficient Charge ◽  
Acceptor Molecules

It was well known that a “face-on” orientation of acceptor molecules is crucial for efficient charge transport, but little is known about the role of the halogen atoms in controlling...

scholarly journals Unraveling the influence of non-fullerene acceptor molecular packing on photovoltaic performance of organic solar cells

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Linglong Ye ◽  
Kangkang Weng ◽  
Jinqiu Xu ◽  
Xiaoyan Du ◽  
Sreelakshmi Chandrabose ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Charge Transport ◽  
Organic Solar Cells ◽  
Photovoltaic Performance ◽  
Transport Pathway ◽  
Π Stacking ◽  
Fused Ring ◽  
Efficient Charge ◽  
End Group

AbstractIn non-fullerene organic solar cells, the long-range structure ordering induced by end-group π–π stacking of fused-ring non-fullerene acceptors is considered as the critical factor in realizing efficient charge transport and high power conversion efficiency. Here, we demonstrate that side-chain engineering of non-fullerene acceptors could drive the fused-ring backbone assembly from a π–π stacking mode to an intermixed packing mode, and to a non-stacking mode to refine its solid-state properties. Different from the above-mentioned understanding, we find that close atom contacts in a non-stacking mode can form efficient charge transport pathway through close side atom interactions. The intermixed solid-state packing motif in active layers could enable organic solar cells with superior efficiency and reduced non-radiative recombination loss compared with devices based on molecules with the classic end-group π–π stacking mode. Our observations open a new avenue in material design that endows better photovoltaic performance.

scholarly journals Efficient Charge Transport Enables High Efficiency in Dilute Donor Organic Solar Cells

2021 ◽  
pp. 5039-5044
Author(s):  
Nannan Yao ◽  
Jianqiu Wang ◽  
Zeng Chen ◽  
Qingzhen Bian ◽  
Yuxin Xia ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Efficient Charge

scholarly journals Unraveling the Influence of Non-Fullerene Acceptor Molecular Packing on Phovoltaic Performance of Organic Solar Cells

2020 ◽  
Author(s):  
Yanming Sun ◽  
Linglong Ye ◽  
Kangkang Weng ◽  
Jinqiu Xu ◽  
Xiaoyan Du ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Charge Transport ◽  
Organic Solar Cells ◽  
Photovoltaic Performance ◽  
Transport Pathway ◽  
Π Stacking ◽  
Fused Ring ◽  
Efficient Charge ◽  
End Group

Abstract In non-fullerene organic solar cells (OSCs), the long-range structure ordering induced by end group π–π stacking of fused-ring non-fullerene acceptors is considered as the critical factor in realizing efficient charge transport and high power conversion efficiency. Here, we demonstrate that side-chain engineering of non-fullerene acceptors could drive the fused-ring backbone assembly from a π–π stacking mode to an intermixed packing mode, and to a non-stacking mode to refine its solid-state properties. Different from the above-mentioned understanding, we find that close atom contacts in a non-stacking mode can form efficient charge transport pathway through close side atom interactions. The intermixed solid-state packing motif in active layers could enable OSCs with superior efficiency and reduced non-radiative recombination loss compared with devices based on molecules with the classic end-group π–π stacking mode. Our observations provide new insights into the influence of non-fullerene acceptor molecular packing on exciton dissociation, charge transport, and recombination losses, and open a new avenue in material design that endows better photovoltaic performance.

The Role of Balanced Dual Charge Generation Pathways in Ternary Organic Solar Cells

2021 ◽  
Author(s):  
Zewen Chen ◽  
Hongzhu Chen ◽  
Chuang Feng ◽  
xiaojing wang ◽  
Zhicai He ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Power ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
High Power Conversion Efficiency ◽  
Charge Generation ◽  
Efficient Charge

Efficient charge generation and transfer is crucial for Organic Solar Cells (OSCs) to achieve high power conversion efficiency (PCE). The ternary strategy is commonly used to expand the absorption range...

Sign in / Sign up

Export Citation Format

Share Document