High-Performance Organic Solar Cells Featuring Double Bulk Heterojunction Structures with Vertical-Gradient Selenium Heterocyclic Nonfullerene Acceptor Concentrations

Supramolecular self-assembly of a porphyrin donor with J-aggregates affords higher performance with a PC71BM acceptor in bulk heterojunction organic solar cells.

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Design of Near‐Infrared Nonfullerene Acceptor with Ultralow Nonradiative Voltage Loss for High‐Performance Semitransparent Ternary Organic Solar Cells

Angewandte Chemie International Edition ◽

10.1002/anie.202116111 ◽

2021 ◽

Author(s):

Wuyue Liu ◽

Shaoming Sun ◽

Liang Zhou ◽

Yong Cui ◽

Wenkai Zhang ◽

...

Keyword(s):

Solar Cells ◽

Organic Solar Cells ◽

High Performance ◽

Near Infrared ◽

Voltage Loss ◽

Nonfullerene Acceptor

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High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cells

ACS Applied Materials & Interfaces ◽

10.1021/acsami.6b00242 ◽

2016 ◽

Vol 8 (10) ◽

pp. 6309-6314 ◽

Cited By ~ 27

Author(s):

Jurgen Kesters ◽

Sanne Govaerts ◽

Geert Pirotte ◽

Jeroen Drijkoningen ◽

Michèle Chevrier ◽

...

Keyword(s):

Solar Cells ◽

Organic Solar Cells ◽

High Performance ◽

Bulk Heterojunction ◽

High Permittivity ◽

Conjugated Polyelectrolyte

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

Nature Communications ◽

10.1038/s41467-019-13292-1 ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 73

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.

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High-Performance Ternary Organic Solar Cells Enabled by Combining Fullerene and Nonfullerene Electron Acceptors

Organic Materials ◽

10.1055/s-0039-1700848 ◽

2019 ◽

Vol 01 (01) ◽

pp. 030-037 ◽

Cited By ~ 1

Author(s):

Jianyun Zhang ◽

Wenrui Liu ◽

Shengjie Xu ◽

Xiaozhang Zhu

Keyword(s):

Solar Cells ◽

Organic Solar Cells ◽

High Performance ◽

Power Conversion ◽

Wide Bandgap ◽

The Third ◽

Bimolecular Recombination ◽

Conversion Efficiencies ◽

Wide Bandgap Polymer ◽

Nonfullerene Acceptor

Recently, by elaborately designing nonfullerene acceptors and selecting suitable polymer donors great progresses have been made towards binary organic solar cells (OSCs) with power conversion efficiencies (PCEs) over 15%. Ternary organic photovoltaics by introducing a third component into the host binary system is recognized to be highly effective to elevate the performance through extending the light absorption, manipulating the recombination behavior of the carriers, and improving the morphology of the active layer. In this work, we synthesized a new electron-acceptor ZITI-4F matching it with the wide-bandgap polymer donor PBDB-T The PBDB-T:ZITI-4F-based OSC showed a high PCE of 12.33%. After introducing 40% of PC71BM as the third component, the ternary device achieved an improved PCE of 13.40% with simultaneously improved photovoltaic parameters. The higher performance of the ternary device can be attributed to the improved and more balanced charge mobility, reduced bimolecular recombination, and more favorable morphology. These results indicate that the cooperation of a fullerene-based acceptor and a nonfullerene acceptor to fabricate ternary OSCs is an effective approach to optimizing morphology and therefore to increase the performance of OSCs.

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