Recent development of efficient A-D-A type fused-ring electron acceptors for organic solar

Liu, Zhitian; Zhang, Xiaolu; Li, Pengcheng; Gao, Xiang

doi:10.1016/j.solener.2018.09.008

Cited by 51 publications

(39 citation statements)

References 107 publications

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“…Bulk heterojunction (BHJ) polymer solar cells (PSCs), comprising conjugated polymer as electron donor and fullerene or nonfullrene derivatives as electron acceptor, have been drawing extensive attentions because of their advantages of low cost, large-area solution processability, light weight, mechanical flexibility and the great potential for commercial applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] . Especially the nonfullerence polymer solar cells have shown a new direction for photovoltaic study due to the rapid development in PCE [21][22][23][24] .…”

Section: Introductionmentioning

confidence: 99%

Chlorination strategy on polymer donors toward efficient solar conversions

Chao

Johner

Zhong

et al. 2019

Journal of Energy Chemistry

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Section: Introductionmentioning

confidence: 99%

Chlorination strategy on polymer donors toward efficient solar conversions

Chao

Johner

Zhong

et al. 2019

Journal of Energy Chemistry

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“…Even with the significant limitations of FAs, much of the OSC research focused on the development of low bandgap donor materials especially conjugated polymer with broad absorption and fine‐tuning photophysical properties to match FAs. Recently, rapid progress has been made on NFAs especially on FREAs to overcome the challenges described earlier . FREAs offer some distinct advantages.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Molecular Design of Fused Ring Electron Acceptors for Organic Solar Cells

Dey

2019

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The quest for sustainable energy sources has led to accelerated growth in research of organic solar cells (OSCs). A solution‐processed bulk‐heterojunction (BHJ) OSC generally contains a donor and expensive fullerene acceptors (FAs). The last 20 years have been devoted by the OSC community to developing donor materials, specifically low bandgap polymers, to complement FAs in BHJs. The current improvement from ≈2.5% in 2013 to 17.3% in 2018 in OSC performance is primarily credited to novel nonfullerene acceptors (NFA), especially fused ring electron acceptors (FREAs). FREAs offer unique advantages over FAs, like broad absorption of solar radiation, and they can be extensively chemically manipulated to tune optoelectronic and morphological properties. Herein, the current status in FREA‐based OSCs is summarized, such as design strategies for both wide and narrow bandgap FREAs for BHJ, all‐small‐molecule OSCs, semi‐transparent OSC, ternary, and tandem solar cells. The photovoltaics parameters for FREAs are summarized and discussed. The focus is on the various FREA structures and their role in optical and morphological tuning. Besides, the advantages and drawbacks of both FAs and NFAs are discussed. Finally, an outlook in the field of FREA‐OSCs for future material design and challenges ahead is provided.

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“…The use of one donor and two acceptors, one of which is not fullerene based, has rarely been applied and very few such examples show high PCE values . Nonfullerene acceptors (NFAs) are currently a main target of interest in OSCs due to their lower cost and the fact that their energy levels and optical properties can be finely tuned to minimize energy loss. The performance of these systems is, at this moment, 14–16% and 16.67% for binary and ternary active layers, respectively, using conjugated polymers as the donor .…”

Section: Introductionmentioning

confidence: 99%

Ternary Organic Solar Cell with a Near‐Infrared Absorbing Selenophene–Diketopyrrolopyrrole‐Based Nonfullerene Acceptor and an Efficiency above 10%

et al. 2020

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A new near‐IR absorbing nonfullerene acceptor (NFA), MPU4, is synthesized in three steps from an accessible selenophene–diketopyrrolopyrrole and rhodanine. The high planarity of the molecule and the extended conjugation determine that the new NFA presents a high optical absorption coefficient and a narrow bandgap. In thin films, MPU4 shows broad absorption in the visible and near‐IR regions from 550 to 930 nm. When blended with a phenothiazine‐based small‐molecule (SM) donor, SM1, the resulting additive‐free binary organic solar cell (OSC) exhibits an efficiency of 8.96% with a high open‐circuit voltage (Voc) of 0.99 V and a short‐circuit current (Jsc) of 14.91 mA cm−2 with a remarkably low energy loss (Eloss) of 0.42 eV. This efficiency is significantly higher (24%) than that achieved with an analogous device with a thiophene‐containing NFA (MPU1, 7.22%) instead of MPU4. Importantly, ternary solar cells prepared with SM1 as the donor and MPU4 and PC71BM as acceptors afford, after solvent vapor annealing, an efficiency of 10.04% with a Voc of 0.92 V, Jsc of 16.32 mA cm−2, fill factor of 0.67, and Eloss of 0.49 eV. These results demonstrate the advantages of using selenophene instead of thiophene in SM OSCs.

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Recent development of efficient A-D-A type fused-ring electron acceptors for organic solar

Cited by 51 publications

References 107 publications

Chlorination strategy on polymer donors toward efficient solar conversions

Chlorination strategy on polymer donors toward efficient solar conversions

Recent Progress in Molecular Design of Fused Ring Electron Acceptors for Organic Solar Cells

Ternary Organic Solar Cell with a Near‐Infrared Absorbing Selenophene–Diketopyrrolopyrrole‐Based Nonfullerene Acceptor and an Efficiency above 10%

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