Enhancing phase separation with a conformation-locked nonfullerene acceptor for over 14.4% efficiency solar cells

2019 ◽  
Vol 7 (42) ◽  
pp. 13279-13286 ◽  
Author(s):  
Zhuohan Zhang ◽  
Xin Liu ◽  
Jiangsheng Yu ◽  
Hongtao Wang ◽  
Ming Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Organic Solar Cells ◽  
Electron Acceptors ◽  
Active Layers ◽  
Fused Ring ◽  
Molecular Backbone ◽  
Fine Tune ◽  
Nonfullerene Acceptor

The molecular backbone design and sidechain control are both considered for fused-ring electron acceptors to fine-tune the morphology and miscibility of the active layers for organic solar cells.

Vertically Optimized Phase Separation with Improved Exciton Diffusion Enables High-Efficiency Organic Solar Cells with Thick Active Layers

2021 ◽  
Author(s):  
Yanming Sun ◽  
Yunhao Cai ◽  
Qian Li ◽  
Guanyu Lu ◽  
Hwa Sook Ryu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Active Layer ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Diffusion Length ◽  
Active Layer Thickness ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
Active Layers

Abstract The development of high-performance organic solar cells (OSCs) with thick active layers is of crucial importance for the roll-to-roll printing of large-area solar panels. Unfortunately, increasing the active layer thickness usually results in a significant reduction in efficiency. Herein, we fabricated efficient thick-film OSCs with an active layer consisting of one polymer donor and two non-fullerene acceptors. The two acceptors were found to possess enlarged exciton diffusion length in the mixed phase, which is beneficial to exciton generation and dissociation. Additionally, layer by layer approach was employed to optimize the vertical phase separation. Benefiting from the synergetic effects of enlarged exciton diffusion length and graded vertical phase separation, a record high efficiency of 17.31% (certified value of 16.9%) was obtained for the 300 nm-thick OSC, with an unprecedented short-circuit current density of 28.36 mA cm−2, and a high fill factor of 73.0%. Moreover, the device with an active layer thickness of 500 nm also shows a record efficiency of 15.21%. This work provides new insights into the fabrication of high-efficiency OSCs with thick active layers.

Isomeric effect of fluorene-based fused-ring electron acceptors to achieve high-efficiency organic solar cells

2020 ◽  
Vol 8 (10) ◽  
pp. 5315-5322 ◽  
Author(s):  
Yung-Jing Xue ◽  
Fong-Yi Cao ◽  
Po-Kai Huang ◽  
Yen-Chen Su ◽  
Yen-Ju Cheng
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Molecular Design ◽  
Electron Acceptors ◽  
Fused Ring ◽  
Isomeric Effect

A TT-terminal ladder-type donor is generally a better molecular design than the corresponding T-terminal ladder-type isomer for the development of new A–D–A NFEAs.

Replacing Cyano (−C≡N) Group to Design Environmentally Friendly Fused-ring Electron Acceptors

2021 ◽  
Author(s):  
Chuang Yao ◽  
Yezi Yang ◽  
Lei Li ◽  
Maolin Bo ◽  
Cheng Peng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Cyano Group ◽  
Power Conversion ◽  
Electron Acceptors ◽  
Fused Ring ◽  
Electron Withdrawing Group

Cyano-group (−C≡N) is an electron-withdrawing group, which has been widely used to construct high-performance fused-ring electron acceptors (FREAs). Benefiting from these FREAs, the power conversion efficiency of organic solar cells...

scholarly journals Tuning of the conformation of asymmetric nonfullerene acceptors for efficient organic solar cells

2019 ◽  
Vol 7 (39) ◽  
pp. 22279-22286 ◽  
Author(s):  
Linqiang Yang ◽  
Xin Song ◽  
Jiangsheng Yu ◽  
Hongtao Wang ◽  
Zhuohan Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Electron Acceptors ◽  
Fused Ring

In this work, three dithieno[3,2-b:2′,3′-d]pyrrol fused-ring electron acceptors (IPT-2F, IPTT-2F, and IPTTT-2F) have been successfully developed as efficient asymmetric nonfullerene acceptors (NFAs) for organic solar cells (OSCs).

Near-infrared electron acceptors with fused nonacyclic molecular backbones for nonfullerene organic solar cells

2020 ◽  
Vol 4 (6) ◽  
pp. 1729-1738 ◽  
Author(s):  
Jianquan Zhang ◽  
Yunke Li ◽  
Zhengxing Peng ◽  
Fujin Bai ◽  
Lik-Kuen Ma ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Near Infrared ◽  
Electron Acceptors ◽  
Strong Electron ◽  
Molecular Backbone

Two strong electron-donating moieties were fused into the molecular backbone of small molecular acceptors showing dramatically extended absorption beyond 900 nm.

Enhancing the Performance of Organic Solar Cells by Hierarchically Supramolecular Self-Assembly of Fused-Ring Electron Acceptors

2018 ◽  
Vol 30 (13) ◽  
pp. 4307-4312 ◽  
Author(s):  
Yahui Liu ◽  
Cai’e Zhang ◽  
Dan Hao ◽  
Zhe Zhang ◽  
Liangliang Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Self Assembly ◽  
Electron Acceptors ◽  
Fused Ring

Efficient fullerene-free organic solar cells based on fused-ring oligomer molecules

2016 ◽  
Vol 4 (4) ◽  
pp. 1486-1494 ◽  
Author(s):  
Yuze Lin ◽  
Jiayu Wang ◽  
Tengfei Li ◽  
Yang Wu ◽  
Cheng Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
High Crystallinity ◽  
Donor And Acceptor ◽  
Fused Ring ◽  
Small Phase

Organic solar cells based on monodisperse fused-ring oligomer molecule donor and acceptor blends exhibit a power conversion efficiency of over 6%; high crystallinity and small phase separation coexist in the blends.

Improving the Performance of Organic Solar Cells by Side Chain Engineering of Fused Ring Electron Acceptors

2021 ◽  
Author(s):  
Ya-Nan Chen ◽  
Rui Zheng ◽  
Jing Wang ◽  
Hang Wang ◽  
Miao Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Molecular Design ◽  
Electron Acceptors ◽  
Side Chain ◽  
Design Strategies ◽  
Fused Ring ◽  
Photoactive Materials

The side chain engineering of the photoactive materials is one of the most commonly used molecular design strategies for developing high performance organic solar cells (OSCs). Herein, two alkyl (or...

Molecular engineering of central fused-ring cores of non-fullerene acceptors for high-efficiency organic solar cells

2019 ◽  
Vol 7 (9) ◽  
pp. 4313-4333 ◽  
Author(s):  
Hongtao Wang ◽  
Jinru Cao ◽  
Jiangsheng Yu ◽  
Zhuohan Zhang ◽  
Renyong Geng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Molecular Engineering ◽  
Electron Acceptors ◽  
Fused Ring

Core engineering on fused-ring electron acceptors for high-efficiency OSCs is reviewed.

Tuning the dipole moments of nonfullerene acceptors with an asymmetric terminal strategy for highly efficient organic solar cells

2019 ◽  
Vol 7 (15) ◽  
pp. 8889-8896 ◽  
Author(s):  
Miao Li ◽  
Yuanyuan Zhou ◽  
Jianqi Zhang ◽  
Jinsheng Song ◽  
Zhishan Bo
Keyword(s):  
Solar Cells ◽  
Thick Film ◽  
Organic Solar Cells ◽  
Dipole Moments ◽  
Electron Acceptors ◽  
Photovoltaic Devices ◽  
Highly Efficient ◽  
Fused Ring

Fused-ring electron acceptors with asymmetric terminals for highly efficient thick-film photovoltaic devices.

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