Molecular Order Control of Non-fullerene Acceptors for High-Efficiency Polymer Solar Cells

Li, Wei; Chen, Mengxue; Cai, Jinlong; Spooner, Emma L. K.; Zhang, Huijun; Gurney, Robert S.; Liu, Dan; Xiao, Zuo; Lidzey, David G.; Ding, Liming; Wang, Tao

doi:10.1016/j.joule.2018.11.023

Cited by 228 publications

(228 citation statements)

References 51 publications

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“…Since 1995, bulk-heterojunction organic solar cells consisting of one or two organic donors and one or two organic acceptors have been fighting for high power conversion efficiencies (PCEs) and good stability [1]. Until recent years, this next-generation photovoltaic technology starts to offer decent PCEs, shedding the light on commercialization, and attracting great attention again [2][3][4][5][6][7][8][9][10][11][12][13][14]. Compared with the continuously emerging highperformance nonfullerene acceptors, high-performance donors are rare.…”

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confidence: 99%

Thiolactone copolymer donor gifts organic solar cells a 16.72% efficiency

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Thiolactone copolymer donor gifts organic solar cells a 16.72% efficiency

et al. 2019

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“…The J ph * , J ph # , J sat , J ph * /J sat , and J ph # /J sat values of the optimized binary and ternary OPVs are summarized in Table . The exciton dissociation efficiency can be evaluated by the J ph * /J sat . The J ph * /J sat of the optimized ternary OPVs is 94.3%, which is slightly larger than 92.8% for the optimized binary OPVs, indicating an improved exciton dissociation efficiency in the ternary active layers with 20 wt% ITCC in acceptors.…”

Section: The Photovoltaic Parameters Of Opvsmentioning

confidence: 97%

Inverted Ternary Organic Photovoltaics with Alloyed Acceptor Exhibiting 12.29% Efficiency

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Wang

Zhang

et al. 2019

Physica Rapid Research Ltrs

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A series of inverted organic photovoltaics (OPVs) are fabricated with PBDB‐T as donor and nonfullerene materials (ITCC and IT‐M) as acceptors, respectively. Power conversion efficiencies (PCEs) of IT‐M‐ and ITCC‐based OPVs are 11.20% and 8.70%, respectively. A 12.29% PCE is achieved from the optimized ternary OPVs with active layers containing 20 wt% ITCC in acceptors, resulting from the simultaneous improvement of the fill factor (FF) of 74.31%, short‐circuit current density (JSC) of 17.41 mA cm−2, as well as open‐circuit voltage (VOC) of 0.952 V. Over 9% PCE improvement is obtained by using the ternary strategy, which is attributed to the complementary absorption spectra, excellent compatibility, as well as well‐matched energy levels of used materials. This work indicates the ternary strategy as an efficient method to achieve efficient OPVs while keeping the simplicity of the fabrication process.

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“…These results indicate that CO i 8DFIC could be useful in ternary OSC and tandem OSC as rear sub‐cell. Recently, by further optimizing the morphology of the blend through fabrication on a hot substrate (100 °C), higher PCE of 13.8% was achieved …”

Section: Nfas and Various Aspects Of Freasmentioning

confidence: 99%

“…Recently, by further optimizing the morphology of the blend through fabrication on a hot substrate (100 °C), higher PCE of 13.8% was achieved. [166] In early 2019, Zou and co-workers synthesized a novel FREA with BT-based core and DFIC terminal units, Y6 (A54, Figure 8). [21] Y6 showed broad absorption at 600-950 nm region with narrow E g opt of 1.33 eV.…”

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confidence: 99%

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

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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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Molecular Order Control of Non-fullerene Acceptors for High-Efficiency Polymer Solar Cells

Cited by 228 publications

References 51 publications

Thiolactone copolymer donor gifts organic solar cells a 16.72% efficiency

Thiolactone copolymer donor gifts organic solar cells a 16.72% efficiency

Inverted Ternary Organic Photovoltaics with Alloyed Acceptor Exhibiting 12.29% Efficiency

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

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