Suppressing charge recombination in small-molecule ternary organic solar cells by modulating donor–acceptor interfacial arrangements

2018 ◽  
Vol 20 (38) ◽  
pp. 24570-24576 ◽  
Author(s):  
Zhen Wang ◽  
Guangchao Han ◽  
Lingyun Zhu ◽  
Yuan Guo ◽  
Yuanping Yi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Charge Recombination ◽  
Electron Donors ◽  
Ternary Blend ◽  
The Third ◽  
Donor Acceptor

Introducing a proper amount of the third component in ternary blend organic solar cells can result in a significant decrease of docking PC71BM with the central electron-donating unit of electron donors and thus suppress charge recombination.

Easy Access to NO2-Containing Donor-Acceptor-Acceptor Electron Donors for High Efficiency Small-Molecule Organic Solar Cells

ChemSusChem ◽  
2016 ◽  
Vol 9 (12) ◽  
pp. 1433-1441 ◽  
Author(s):  
Hao-Chun Ting ◽  
Ya-Ting Yang ◽  
Chia-Hsun Chen ◽  
Jiun-Haw Lee ◽  
Jung-Hung Chang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Electron Donors ◽  
Easy Access ◽  
Donor Acceptor

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.

Donor-acceptor small molecule with coplanar and rigid π-bridge for efficient organic solar cells

2013 ◽  
Vol 109 ◽  
pp. 33-39 ◽  
Author(s):  
Liang-Chen Chi ◽  
Hsiao-Fan Chen ◽  
Wen-Yi Hung ◽  
Yu-Hsiang Hsu ◽  
Ping-Chi Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Donor Acceptor

scholarly journals All-small-molecule organic solar cells with over 14% efficiency by optimizing hierarchical morphologies

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ruimin Zhou ◽  
Zhaoyan Jiang ◽  
Chen Yang ◽  
Jianwei Yu ◽  
Jirui Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Photovoltaic System ◽  
Active Layers ◽  
Donor Acceptor

AbstractThe high efficiency all-small-molecule organic solar cells (OSCs) normally require optimized morphology in their bulk heterojunction active layers. Herein, a small-molecule donor is designed and synthesized, and single-crystal structural analyses reveal its explicit molecular planarity and compact intermolecular packing. A promising narrow bandgap small-molecule with absorption edge of more than 930 nm along with our home-designed small molecule is selected as electron acceptors. To the best of our knowledge, the binary all-small-molecule OSCs achieve the highest efficiency of 14.34% by optimizing their hierarchical morphologies, in which the donor or acceptor rich domains with size up to ca. 70 nm, and the donor crystals of tens of nanometers, together with the donor-acceptor blending, are proved coexisting in the hierarchical large domain. All-small-molecule photovoltaic system shows its promising for high performance OSCs, and our study is likely to lead to insights in relations between bulk heterojunction structure and photovoltaic performance.

Molecular electron acceptors for efficient fullerene-free organic solar cells

2017 ◽  
Vol 19 (5) ◽  
pp. 3440-3458 ◽  
Author(s):  
Shuixing Li ◽  
Zhongqiang Zhang ◽  
Minmin Shi ◽  
Chang-Zhi Li ◽  
Hongzheng Chen
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Wide Bandgap ◽  
Electron Acceptors ◽  
Electron Donors ◽  
Molecular Electron ◽  
Narrow Bandgap

Small molecule electron acceptors pairing with wide bandgap or narrow bandgap electron donors are reviewed and discussed for fullerene-free organic solar cells.

A cyclopentadithiophene-bridged small molecule acceptor with near-infrared light absorption for efficient organic solar cells

2019 ◽  
Vol 7 (14) ◽  
pp. 4013-4019 ◽  
Author(s):  
Yuan-Qiu-Qiang Yi ◽  
Huanran Feng ◽  
Xin Ke ◽  
Jing Yan ◽  
Meijia Chang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Light Absorption ◽  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Donor Acceptor

A cyclopentadithiophene (DTC)-bridged acceptor–donor–acceptor (A–D–A) backboned small molecule acceptor (SMA), namely IDTC-4Cl, was designed and synthesized.

New small-molecule acceptors based on hexacyclic naphthalene(cyclopentadithiophene) for efficient non-fullerene organic solar cells

2017 ◽  
Vol 5 (33) ◽  
pp. 17204-17210 ◽  
Author(s):  
Yuan-Qiu-Qiang Yi ◽  
Huanran Feng ◽  
Meijia Chang ◽  
Hongtao Zhang ◽  
Xiangjian Wan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Central Unit ◽  
Donor Acceptor

A series of new non-fullerene small molecule acceptors (NTIC, NTIC-Me, NTIC-OMe and NTIC-F) based on the acceptor–donor–acceptor (A–D–A) architecture, using hexacyclic naphthalene-(cyclopentadithiophene) as the central unit, were designed and synthesized.

Vinazene end-capped acceptor-donor-acceptor type small molecule for solution-processed organic solar cells

2017 ◽  
Vol 44 ◽  
pp. 11-19 ◽  
Author(s):  
Ming Chen ◽  
Maoheng Yi ◽  
Jinduo Yi ◽  
Minjie Li ◽  
Chenchen Du ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Solution Processed ◽  
Donor Acceptor
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