A5087751395- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Molecular Junctions and Nanostructures
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Synthesis and Properties of Aromatic Compounds
- Luminescence and Fluorescent Materials
- Organic Light-Emitting Diodes Research
- Fullerene Chemistry and Applications
- Organometallic Complex Synthesis and Catalysis
- Metal complexes synthesis and properties
- Photochromic and Fluorescence Chemistry
- Photochemistry and Electron Transfer Studies
- Quantum and electron transport phenomena
- Porphyrin and Phthalocyanine Chemistry
- Advanced Memory and Neural Computing
- Advanced Battery Materials and Technologies
- Advanced battery technologies research
- Crystallography and molecular interactions
- Graphene research and applications
- Advancements in Battery Materials
- Spectroscopy and Quantum Chemical Studies
- Supramolecular Chemistry and Complexes
- Organic and Molecular Conductors Research
Wuhan University of Technology
2016-2025
Columbia University
2014-2017
Frontier Energy (United States)
2015
Central China Normal University
2006-2014
Boston University
2012-2014
Singlet fission (SF) has the potential to significantly enhance photocurrent in single-junction solar cells and thus raise power conversion efficiency from Shockley-Queisser limit of 33% 44%. Until now, quantitative SF yield at room temperature been observed only crystalline solids or aggregates oligoacenes. Here, we employ transient absorption spectroscopy, ultrafast photoluminescence triplet photosensitization demonstrate intramolecular singlet (iSF) with yields approaching 200% per...
A cost-effective gram-scale synthesis of [8]- and [10]cycloparaphenylenes (CPPs) has been developed for the first time. Both [10]cycloparaphenylene organized into herringbone geometries in crystalline state with well-defined cylindrical cavities 1.1 1.4 nm, respectively. With large amounts material available, highly efficient convex–concave π–π interactions between [10]CPP C60 solid-state was validated by X-ray diffraction analysis.
Strained: [6]Cycloparaphenylene, a molecule with 97 kcal mol−1 of strain energy, was synthesized. The synthetic strategy relied on two sequential oxidative dearomatization/addition sequences and final reductive aromatization reaction (see scheme). optoelectronic properties [6]cycloparaphenylene were measured, the analysis X-ray crystal structure revealed linear packing geometry reminiscent carbon nanotube.
Suppressing the photon energy loss (Eloss ), especially non-radiative loss, is of importance to further improve device performance organic solar cells (OSCs). However, typical π-conjugated semiconductors possess a large singlet-triplet gap (ΔEST leading lower triplet state than charge transfer and contributing channel photocurrent by state. Herein, series polymer donors are developed introducing BNIDT block into PM6 backbone. The high electron affinity opposite resonance effect BN bond in...
Combined photodynamic and photothermal therapy (PDT PTT) can achieve more superior therapeutic effects than the sole mode by maximizing photon utilization, but there remains a significant challenge in development of related single-molecule photosensitizers (PSs), particularly those with type I photosensitization. In this study, self-assembly squaraine dyes (SQs) is shown to be promising strategy for designing PSs combined PDT PTT, supramolecular PS (TPE-SQ7) has been successfully developed...
We have designed and synthesized five azulene derivatives containing gold- binding groups at different points of connectivity within the core to probe effects quantum interference through single-molecule conductance measurements. compare conducting paths 5-membered ring, 7-membered across long axis azulene. find that changing in impacts optical properties (as determined from UV-Vis absorption spectra) conductivity. Importantly, we show here simple models cannot be used predict...
Two novel arene-bridged cycloparaphenylene dimers (1 and 2) were prepared using a functionalized precursor, bromo-substituted macrocycle 7. The preferred conformations of these dimeric structures evaluated computationally in the solid state, as well gas solution phases. In trans configuration 1 is by 34 kcal/mol due to denser crystal packing structure that achieved. contrast, phase solution, cis conformation favored 7 (dimer 1) 10 2), with activation barrier 20 kcal/mol. stabilization seen...
Abstract Cycloparaphenylenes (CPPs) have attracted significant attention from theoretical, synthetic, supramolecular and material chemists owing to their aesthetical structures. Since Jasti co‐workers reported the landmark synthesis of [9]CPP, [12]CPP [18]CPP, past ten years witnessed a remarkable burst in development CPP research, synthetic methodologies applications optoelectronic devices. In this Focus Review, we highlight representative strategies CPPs attempts on bottom‐up carbon...
Singlet fission (SF), a multiple exciton generation process that generates two triplet excitons after the absorption of one photon, can potentially enable more efficient solar cell designs by harvesting energy normally lost as heat. While low-bandgap conjugated polymers are highly promising candidates for SF-based cells, few polymer materials capable SF have been reported because in chains is poorly understood. Using transient spectroscopy, we demonstrate new, (triplet yield 160-200%)...
Triplet acceptors have been developed to construct high-performance organic solar cells (OSCs) as the long lifetime and diffusion range of triplet excitons may dissociate into free charges instead net recombination when energy levels lowest state (T1 ) are close those charge-transfer states (3 CT). The current were designed by introducing heavy atoms enhance intersystem crossing, limiting their applications. Herein, two twisted without atoms, analogues Y6, constructed with large π-conjugated...
Despite remarkable breakthrough made by virtue of "polymerized small-molecule acceptor (PSMA)" strategy recently, the limited selection pool high-performance polymer acceptors and long-standing challenge in morphology control impede their further developments. Herein, three PSMAs PYDT-2F, PYDT-3F, PYDT-4F are developed introducing different fluorine atoms on end groups and/or bithiophene spacers to fine-tune optoelectronic properties for PSMAs. The exhibit narrow bandgap energy levels that...
Terpolymer fabrication is an effective methodology for molecular engineering and generating high-performance organic photovoltaic materials to construct highly efficient polymer solar cells. Modification of the PM6 by incorporating a third component resulting in formation ternary copolymer reported outperform achieving enhanced device performances. However, one major challenges constructing terpolymers counter disorder caused backbone entropy induced moiety. In this work, double B←N bridged...
Accidentally, it was found that triphenylamine (TPA) from commercial sources shows ultralong yellow-green room temperature phosphorescence (RTP) like carbazole, which however disappears for lab-synthesized TPA with high purity. Herein, we the first time identify impurity types cause RTP of TPA, are two N, N-diphenyl-naphthylamine isomers. Due to similar molecular polarity and very trace amount (≈0.8 ‰, molar ratio), these naphthyl substituted impurities can be easily overlooked. We further...
The dual-additive strategy forms balanced crystallization and phase separation, with a record efficiency of 20.52% (certified 19.92%) achieved.
A key challenge in the search of new materials capable singlet fission (SF) arises from primary energy conservation criterion, i.e., triplet exciton has to be half that (E(S
A highly efficient and stable all-small-molecule system with excellent thickness tolerance recycling capability has been developed, by integrating a new giant molecule acceptor (Se-Giant) into the MPhS-C2:BTP-eC9 binary system.