π-Extension and chlorination of non-fullerene acceptors enable more readily processable and sustainable high-performance organic solar cells

Su, Ning; Chen, Jianhua; Peng, Mengran; Li, Guoping; Pankow, Robert M.; Zheng, Ding; Ding, Junqiao; Facchetti, Antonio; Marks, Tobin J.

doi:10.1016/j.jechem.2022.12.002

Cited by 9 publications

(3 citation statements)

References 45 publications

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“…Such offsets ensure efficient charge transfer at the donor-acceptor interface, subsequently offering enhanced OSC performance. The work by Su et al [59] provides a concrete example of this methodology, wherein they incorporated chloro groups into an NFA akin to Y6 but with an extended π system via naphthalene. The chloro groups not only served the purpose of energy level tuning but also seemed to offer additional benefits.…”

Section: Challenges and Strategies To Improve Efficiencymentioning

confidence: 99%

Tackling Efficiency Challenges and Exploring Greenhouse-Integrated Organic Photovoltaics

Ansari,

Ciampi,

Sibilio

2023

Energies

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Organic solar cells offer benefits such as transparent characteristics, affordability in manufacturing, and the ability to tailor light absorption properties according to specific needs. This review discusses challenges and recent strategies to enhance the power conversion efficiency of organic solar cells, such as bandgap tuning, molecular orbital alignment, active layer morphology engineering, electron-donating and -withdrawing group incorporation, side chain length engineering, a third additive’s insertion, and control of the solubility of materials. The good transparency of organic solar cells makes them ideal for greenhouse-integrated photovoltaics applications. By efficiently absorbing sunlight for photosynthesis and clean energy production, transparent organic solar cells optimize light management, enhance energy efficiency, and minimize overheating risks, resulting in more sustainable and efficient greenhouse operations. This review also evaluates organic solar cell integration in the greenhouse. The implementation of the strategies explored in this review can significantly impact a wide range of performance parameters in organic solar cells. These parameters include the optoelectronic properties, absorption spectrum, open circuit voltage, exciton dissociation, charge transport, molecular packing, solubility, phase separation, crystallinity, nanoscale morphology, and device stability. An optimized organic solar cell design is particularly beneficial for greenhouse-integrated photovoltaics, as it ensures efficient energy conversion and energy management, which are crucial factors in maximizing the performance of the greenhouse.

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Section: Challenges and Strategies To Improve Efficiencymentioning

confidence: 99%

Tackling Efficiency Challenges and Exploring Greenhouse-Integrated Organic Photovoltaics

Ansari,

Ciampi,

Sibilio

2023

Energies

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“…Since their discovery, molecular nonfullerene acceptors (mNFAs) such as ITIC, Y6, and their derivatives have significantly advanced the power conversion efficiencies (PCEs) of bulk‐heterojunction (BHJ) organic solar cells (OSCs), now surpassing 19 %, [1] reflecting their improved light harvesting, high electron mobility, and isotropic charge transport. Remarkable PCEs have been demonstrated employing several types of molecular and polymeric donors as well as several OSC architectures [2–9] . Despite these advances over classical fullerene BHJ acceptors such as phenyl‐C 61 ‐Butyric‐Acid‐Methyl Ester (PC 61 BM) and phenyl‐C 71 ‐Butyric‐Acid‐Methyl Ester (PC 71 BM), [10–12] mNFAs (Figure 1a) still suffer from deficiencies limiting further PCE advances and acceptable OSC stability [13,14] .…”

Section: Introductionmentioning

confidence: 99%

“…Remarkable PCEs have been demonstrated employing several types of molecular and polymeric donors as well as several OSC architectures. [2][3][4][5][6][7][8][9] Despite these advances over classical fullerene BHJ acceptors such as phenyl-C 61 -Butyric-Acid-Methyl Ester (PC 61 BM) and phenyl-C 71 -Butyric-Acid-Methyl Ester (PC 71 BM), [10][11][12] mNFAs (Figure 1a) still suffer from deficiencies limiting further PCE advances and acceptable OSC stability. [13,14] Recently, it was proposed that BHJ morphological stability, long-term PCE, and OSC mechanical properties could be improved using polymeric semiconductors as both donor and acceptor components of the BHJ layer.…”

Section: Introductionmentioning

confidence: 99%

Anthradithiophene (ADT)‐Based Polymerized Non‐Fullerene Acceptors for All‐Polymer Solar Cells

Forti

Pankow

Qin

et al. 2023

Chemistry A European J

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Realizing efficient all‐polymer solar cell (APSC) acceptors typically involves increased building block synthetic complexity, hence potentially unscalable syntheses and/or prohibitive costs. Here we report the synthesis, characterization, and implementation in APSCs of three new polymer acceptors P1–P3 using a scalable donor fragment, bis(2‐octyldodecyl)anthra[1,2‐b : 5,6‐b’]dithiophene‐4,10‐dicarboxylate (ADT) co‐polymerized with the high‐efficiency acceptor units, NDI, Y6, and IDIC. All three copolymers have comparable photophysics to known polymers; however, APSCs fabricated by blending P1, P2 and P3 with donor polymers PM5 and PM6 exhibit modest power conversion efficiencies (PCEs), with the champion P2‐based APSC achieving PCE=5.64 %. Detailed morphological and microstructural analysis by AFM and GIWAXS reveal a non‐optimal APSC active layer morphology, which suppresses charge transport. Despite the modest efficiencies, these APSCs demonstrate the feasibility of using ADT as a scalable and inexpensive electron rich/donor building block for APSCs.

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Thickness Insensitive Organic Solar Cells with High Figure‐of‐Merit‐X Enabled by Simultaneous D/A Interpenetration and Stratification

Xie,

Ma,

Luo

et al. 2024

Advanced Energy Materials

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Low cost and printing friendly fabrication of organic solar cells (OSCs) require thick‐film devices with simply structured photoactive molecules. Thus, achieving high power conversion efficiency (PCE) for non‐fused ring acceptor‐based devices with high thickness is of great significance. Herein, by transforming traditional blend casting method to emerging sequential deposition (SD) method, D18:A4T‐16 active blend exhibits large efficiency improvement from 8.02% to 14.75% in 300 nm thick devices. Systematic morphological and photophysical characterizations showcase the effectiveness of SD processing in achieving sufficient donor/acceptor interpenetration and vertical stratification, which eliminates the dilemma of charge generation/transport in blend casting films. Meanwhile, D18 bottom layer is proven helpful in realizing fast evaporation of postdeposited poor solvent, resulting in naturally thickened active layer with well‐regulated crystallization. Furthermore, a new index to emphasize thick‐film devices based on nonfused ring acceptors, called figure‐of‐merit‐X (FoM‐X), has been defined. The SD processed D18:A4T‐16 devices herein, with 300 nm, 500 nm, and 800 nm thicknesses possess leading FoM‐X values.

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π-Extension and chlorination of non-fullerene acceptors enable more readily processable and sustainable high-performance organic solar cells

Cited by 9 publications

References 45 publications

Tackling Efficiency Challenges and Exploring Greenhouse-Integrated Organic Photovoltaics

Tackling Efficiency Challenges and Exploring Greenhouse-Integrated Organic Photovoltaics

Anthradithiophene (ADT)‐Based Polymerized Non‐Fullerene Acceptors for All‐Polymer Solar Cells

Thickness Insensitive Organic Solar Cells with High Figure‐of‐Merit‐X Enabled by Simultaneous D/A Interpenetration and Stratification

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