A5040762333- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Fullerene Chemistry and Applications
- Thin-Film Transistor Technologies
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Chalcogenide Semiconductor Thin Films
- Nanomaterials for catalytic reactions
- Nanowire Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Semiconductor materials and interfaces
- Solid-state spectroscopy and crystallography
- Carbon Nanotubes in Composites
- Covalent Organic Framework Applications
- Nanomaterials and Printing Technologies
- Advanced Photocatalysis Techniques
- Nanoparticle-Based Drug Delivery
South China University of Technology
2020-2023
State Key Laboratory of Pulp and Paper Engineering
2021
State Key Laboratory of Luminescent Materials and Devices
2021
Pulp and Paper Research Institute
2021
Shanghai Jiao Tong University
2019
Imperial College London
2013-2018
Plastic Electronics (Netherlands)
2015
Swansea University
2015
Abstract Solution-processed organic photovoltaics (OPV) offer the attractive prospect of low-cost, light-weight and environmentally benign solar energy production. The highest efficiency OPV at present use low-bandgap donor polymers, many which suffer from problems with stability synthetic scalability. They also rely on fullerene-based acceptors, themselves have issues cost, limited spectral absorption. Here we a new non-fullerene acceptor that has been specifically designed to give improved...
A novel small molecule, FBR, bearing 3-ethylrhodanine flanking groups was synthesized as a nonfullerene electron acceptor for solution-processed bulk heterojunction organic photovoltaics (OPV). straightforward synthesis route employed, offering the potential large scale preparation of this material. Inverted OPV devices employing poly(3-hexylthiophene) (P3HT) donor polymer and FBR gave power conversion efficiencies (PCE) up to 4.1%. Transient steady state optical spectroscopies indicated...
Nonfullerene solar cells have increased their efficiencies up to 13%, yet quantum are still limited 80%. Here we report efficient nonfullerene with approaching unity. This is achieved overlapping absorption bands of donor and acceptor that increases the photon strength in range from about 570 700 nm, thus, almost all incident photons absorbed active layer. The charges generated found dissociate negligible geminate recombination losses resulting a short-circuit current density 20 mA cm-2...
Abstract Despite the rapid developments in all‐polymer solar cells (all‐PSCs) due to progress of polymerized small molecular acceptors (PSMA), effect linkage unit conjugation on polymer acceptor (P A ) is not well understood and P s with high efficiency, good stability, thickness‐insensitivity are rarely seen. Herein, two novel PSMAs, named PJTVT PJTET designed, by incorporating conjugated thienylene‐vinylene‐thienylene (TVT) unconjugated thienylene–ethyl–thienylene (TET) units,...
We report a general light processing strategy for organic solar cells (OSC) that exploits the propensity of fullerene derivative PC60BM to photo-oligomerize, which is capable both stabilizing polymer:PC60BM active layer morphology and enhancing device stability under thermal annealing. The observations hold blends with an array benchmark donor polymer systems, including P3HT, DPP-TT-T, PTB7, PCDTBT. kinetics thermally induced crystallization within blend films are investigated as function...
Abstract To achieve adhesive and conformable wearable electronics, improving stretchable transparent electrode (STE) becomes an indispensable bottleneck needed to be addressed. Here, we adopt a nonuniform Young’s modulus structure with silver nanowire (AgNW) fabricate STE layer. This layer possesses transparency of >88% over wide spectrum range 400–1000 nm, sheet resistance below 20 Ω sq −1 , stretchability up 100%, enhanced mechanical robustness, low surface roughness, good interfacial...
Dithieno[3′,2′:3,4;2′′,3′′:5,6]benzo[1,2-<italic>c</italic>][1,2,5]thiadiazole (fDTBT)-based polymer donors with tunable energy levels by sulfur/fluorine side-chains are designed and enable high-efficiency all-polymer solar cells a maximum efficiency of 15.8%.
Abstract Cost‐effective, solution‐processable organic photovoltaics (OPV) present an interesting alternative to inorganic silicon‐based solar cells. However, one of the major remaining challenges OPV devices is their lack long‐term operational stability, especially at elevated temperatures. The synthesis a fullerene dumbbell and its use as additive in active layer PCDTBT:PCBM‐based device reported. addition only 20 % this novel not leads improved efficiencies, but more importantly also...
Tuning the polarity of green antisolvents (using various ethers) allows high control over purity intermediate phase triple-cation lead halide perovskite thin films.
Abstract Morphological stability is a key requirement for outdoor operation of organic solar cells. We demonstrate that morphological and lifetime polymer/fullerene based cells under thermal stress depend strongly on the substrate interface which active layer deposited. In particular, we find benchmark PCDTBT/PCBM modest substantially increased in inverted employing ZnO compared to conventional devices PEDOT:PSS substrate. This improved observed correlate with PCBM nucleation at 50 nm scale,...
Inorganic perovskite CsPbBr<sub>3</sub> quantum dots (QDs) have emerged as a promising candidate for optoelectronic applications due to their narrow emission and color purity, among other things.
We investigate an electron transport bilayer fabricated at <110 °C to form all low-temperature processed, thermally stable, efficient perovskite solar cells with negligible hysteresis. The components of the create a symbiosis that results in improved devices compared either being used isolation. A sol-gel derived ZnO layer facilitates energy level alignment and enhanced charge carrier extraction [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) reduce hysteresis enhance thermal stability....
Rapid developments in material design have led to significant breakthroughs the power conversion efficiency (PCE) of all‐polymer solar cells (all‐PSCs) recent years. However, most these devices are processed using halogenated solvents. Here, nonhalogenated solvent o ‐xylene ( ‐XY)‐processed all‐PSCs based on PBDB‐T:PJ1 studied. Interestingly, it is found that can be greatly improved 14.34% by simply increasing spin‐coating speed during device processing. Careful studies reveal this...
The photochemistry and stability of fullerene films is found to be strongly dependent upon film nanomorphology. In particular, PC61BM blend films, dispersed with polystyrene, are more susceptible photobleaching in air than the aggregated neat films. This enhanced correlated increased oxygen quenching triplet states appearance a carbonyl FTIR absorption band indicative oxidation, suggesting photo-oxidation primarily due triplet-mediated singlet generation. were observed undergo for even...
We report the synthesis of two barbiturate end-capped non-fullerene acceptors and demonstrate their efficient function in high voltage output organic solar cells. The acceptor with lower LUMO level is shown to exhibit suppressed geminate recombination losses, resulting enhanced photocurrent generation higher overall device efficiency.
Abstract Herein, a meta‐analysis of the device performance and transient spectroscopic results are undertaken for various donor:acceptor blends, employing three different donor polymers seven acceptors including nonfullerene (NFAs). From this analysis, it is found that primary determinant external quantum efficiency (EQE) energy offset driving interfacial charge separation, Δ E CS . For devices polymer PffBT4T blended with NFA fullerene acceptors, an = 0.30 eV required to achieve near unity...
Light-emitting diodes using metal halide perovskite (PeLEDs) exhibit a strong potential for emerging display technologies due to their unique optoelectronic characteristics. However, blue emission PeLEDs, there remains huge challenge achieve high performance, an issue that has been addressed in red and green counterparts. The community is circumventing the challenges synthesizing stable, high-quantum-efficiency, low-defect-density emitters. Here, facile strategy replaces Pb by adding...
Diketopyrrolopyrrole (DPP)-based polymers have been consistently used for the fabrication of solar cell devices and transistors due to existence intermolecular short contacts, resulting in high electron hole mobilities. However, they also often show limited external quantum efficiencies (EQEs). In this contribution, authors analyze limitations on EQE by a combined study exciton dissociation efficiency, charge separation, recombination kinetics thin films DPP-based donor polymer, DPPTT-T...
OPV film deposition by wire-bar coating and light soaking result in polymer:fullerene solar cells with synergetically enhanced thermal stability.
In organic solar cells, interfacial materials play essential roles in charge extraction, transportation, and collection. Currently, highly efficient thickness-insensitive are urgently needed printable large area module devices. Herein, water/alcohol-soluble conjugated polyelectrolyte PFNBT-Br, with medium bandgap based on benzothiadiazole, doped by two alkali metal sodium salts, NaH2 PO2 , Na2 C2 O4 different counter anions, to pursue high efficiency electron-transport layers. Results show...
Abstract Cost‐effective, solution‐processable organic photovoltaics (OPV) present an interesting alternative to inorganic silicon‐based solar cells. However, one of the major remaining challenges OPV devices is their lack long‐term operational stability, especially at elevated temperatures. The synthesis a fullerene dumbbell and its use as additive in active layer PCDTBT:PCBM‐based device reported. addition only 20 % this novel not leads improved efficiencies, but more importantly also...
Solar cells based on blends of the donor polymer, P3HT, with nonfullerene acceptor, O-IDTBR, have been shown to exhibit promising efficiencies and stabilities for low-cost organic photovoltaic devices. We focus herein charge separation recombination dynamics in such By employing selective wavelength excitations P3HT we show that photoexcitation results lower internal quantum efficiency (IQE) photocurrent generation than observed O-IDTBR. Transient absorption photoluminescence quenching...