Recent progress in organic solar cells (Part I material science)

Science China Chemistry, Journal Year: 2021, Volume and Issue: 65(2), P. 224 - 268

Published: Dec. 27, 2021

Language: Английский

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Desired open-circuit voltage increase enables efficiencies approaching 19% in symmetric-asymmetric molecule ternary organic photovoltaics

Joule, Journal Year: 2022, Volume and Issue: 6(3), P. 662 - 675

Published: Feb. 25, 2022

Language: Английский

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A Full‐Spectrum Porphyrin–Fullerene D–A Supramolecular Photocatalyst with Giant Built‐In Electric Field for Efficient Hydrogen Production

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(31)

Published: July 8, 2021

Abstract A full‐spectrum (300–850 nm) responsive donor–acceptor (D–A) supramolecular photocatalyst tetraphenylporphinesulfonate/fullerene (TPPS/C 60 ) is successfully constructed. The theoretical spectral efficiency of TPPS/C as high 70%, offering the possibility full‐solar‐spectrum light harvesting. performs a highly efficient photocatalytic H 2 evolution rate 276.55 µmol h −1 (34.57 mmol g ), surpassing many reported organic photocatalysts. D–A structure effectively promotes electron transfer from TPPS to C , which beneficial reaction. Specifically, giant internal electric field in built via enhanced molecular dipole, dramatically charge separation (CS) by 2.35 times. Transient absorption spectra results show long‐lived CS state •+ –C •− structure, participation photogenerated electrons reduction Briefly, this work provides novel approach for designing high‐performance materials enhancing interfacial field.

Language: Английский

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Porphyrin-based framework materials for energy conversion

Deleted Journal, Journal Year: 2022, Volume and Issue: 1, P. e9120009 - e9120009

Published: May 26, 2022

With the increasing demand for fuel causing serious environmental pollution, it is urgent to develop new and environmentally friendly energy conversion devices. These devices, however, require good, inexpensive materials electrodes so on. The multifunctional properties of porphyrins enable framework (e.g., metal-organic frameworks covalent organic frameworks) be applied in devices due their simple synthesis, high chemical stability, abundant metallic active sites, adjustable crystalline structure specific surface area. Herein, types porphyrin structural blocks are briefly reviewed. They can used as ligands or directly assembled with generate high-performance electro-/photo-catalysts. catalysts electro-/photo-catalytic water splitting, carbon dioxide reduction, electrocatalytic oxygen reduction also summarized introduced. At end article, we present challenges porphyrin-based above application corresponding solutions. We expect flourish coming years.

Language: Английский

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Recent Progress of Y6‐Derived Asymmetric Fused Ring Electron Acceptors

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(35)

Published: July 5, 2022

Abstract Symmetric conjugated molecules can be broken through suitable synthetic strategies to construct novel asymmetric molecules, which largely broaden the material library. In field of organic solar cells, fused‐ring electron acceptors (FREAs) with A‐DA'D‐A type backbone structure have attracted much attention and enabled power conversion efficiencies (PCE) exceeding 18%. Among them, Y6 is one most classic FREAs that derive many symmetric exhibit unique optoelectronic properties. Thus, in this review, focus on recent progress Y6‐derived containing a dipyrrolobenzothiadiazole segment, classified as following three categories: end group, central core side chain. The relationship molecular structure, properties, device performance discussed detail. Finally, future design directions challenges faced by kind photovoltaic materials are given.

Language: Английский

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Recent progress on all‐small molecule organic solar cells using small‐molecule nonfullerene acceptors

InfoMat, Journal Year: 2020, Volume and Issue: 3(2), P. 175 - 200

Published: Nov. 30, 2020

Abstract Recently, solution‐processed organic solar cells combining small‐molecule donor and nonfullerene acceptor have achieved breakthrough results with the certified efficiency over 15%. These impressive progresses are driven by concerted efforts of modifying materials optimizing morphology. Considering defined chemical structures easily tuned properties materials, it is great necessity importance to pay more attentions on topic all‐small molecule cells. Here, we summarize recent progress from prospect materials' evolutions expect provide some hints for its future developments. The involved donors including oligothiophene‐, benzodithiophene‐, naphthodithiophene‐, porphyrin‐based discussed illustrate relationship structures, properties, device performance. Then, acceptors in molecules highlight their vital role. Finally, will present challenges this research area. image

Language: Английский

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Non-fullerene acceptors with hetero-dihalogenated terminals induce significant difference in single crystallography and enable binary organic solar cells with 17.5% efficiency

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 15(1), P. 320 - 333

Published: Oct. 6, 2021

A synergistic hetero-dihalogenated terminals strategy was systematically employed for the first time to enhance single-crystal packing, boosting device performance of a Y-BO-FCl:PM6 with remarkable PCE 17.52%.

Language: Английский

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Achieving highly efficient all-polymer solar cells by green-solvent-processing under ambient atmosphere

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(8), P. 4499 - 4507

Published: Jan. 1, 2021

The nonhalogenated solvent o-XY-processed-all-PSCs achieved a highly-efficient PCE of 15.6% along with decent processability under ambient conditions.

Language: Английский

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Analytical Review of Spiro‐OMeTAD Hole Transport Materials: Paths Toward Stable and Efficient Perovskite Solar Cells

Advanced Energy and Sustainability Research, Journal Year: 2022, Volume and Issue: 3(8)

Published: May 13, 2022

The hole transport material (HTM) of organic–inorganic perovskite solar cells (PVSCs) plays a very important role for achieving high power conversion efficiency and long‐term stability. 2,2’,7,7’‐tetrakis[ N,N ‐di(4‐methoxyphenyl)amino]‐9‐9’‐spirobifluorene (spiro‐OMeTAD) is the first solid‐state HTM used in PVSCs has gained tremendous attention during last decade. Herein, concept spirolinkage synthesis spiro‐based HTMs discussed, followed by an overview desirable optical electrical properties spiro‐OMeTAD. Recent progress improvements analyzed systematically, impacts interface engineering, dopant‐free spiro‐OMeTAD, novel are reviewed detail. mobility spiro‐OMeTAD depends on types dopants doping concentration. Commonly lithium bis(trifluoromethylsulfonyl)imide 4‐ tert ‐butylpyridine additives reduce PVSC stability due to hygroscopicity corrosiveness, respectively. effects device techniques improve also discussed. review analysis various methods strategies presented useful research community, providing guidance directions toward further development with improved

Language: Английский

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J‐Aggregation Strategy toward Potentiated NIR‐II Fluorescence Bioimaging of Molecular Fluorophores

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(1)

Published: Aug. 1, 2023

Molecular fluorophores emitting in the second near-infrared (NIR-II, 1000-1700 nm) window with strong optical harvesting and high quantum yields hold great potential for vivo deep-tissue bioimaging high-resolution biosensing. Recently, J-aggregates are harnessed to engineer long-wavelength NIR-II emitters show unique superiority tumor detection, vessel mapping, surgical navigation, phototheranostics due their bathochromic-shifted bands required slip-stacked arrangement aggregation state. However, despite preliminary progress of theoretical study structure-property relationships, further paradigms remain scarce lack on aggregated fashion. In this effort, how utilize specific molecular structure form packing motifs J-type exciton coupling is emphatically elucidated. First, several regulating strategies achieve containing intermolecular interactions external conditions positively summarized deeply analyzed. Then, recent reports theranostics systematically provide a clear reference direction promoting development organic fluorophores. Eventually, prospective efforts ameliorating clinical practices outlined.

Language: Английский

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