A5100356671- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Chalcogenide Semiconductor Thin Films
- Fullerene Chemistry and Applications
- Supercapacitor Materials and Fabrication
- Thin-Film Transistor Technologies
- Molecular Junctions and Nanostructures
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Silicon and Solar Cell Technologies
- Advanced Sensor and Energy Harvesting Materials
- solar cell performance optimization
- 2D Materials and Applications
- Advancements in Battery Materials
- Carbon Nanotubes in Composites
- Nanocluster Synthesis and Applications
- Semiconductor materials and interfaces
- IPv6, Mobility, Handover, Networks, Security
- Advanced Thermoelectric Materials and Devices
- Copper-based nanomaterials and applications
- Membrane-based Ion Separation Techniques
- Civil and Geotechnical Engineering Research
North China Electric Power University
2021-2024
China Electric Power Research Institute
2021-2024
Queen Mary University of London
2013-2024
China Agricultural University
2024
Ministry of Agriculture and Rural Affairs
2024
Hebei University of Technology
2023
Xi'an Jiaotong University
2023
University of Verona
2023
Harbin University of Commerce
2023
Chinese Academy of Sciences
2015-2022
Abstract The importance of morphology to organic solar cell performance is well known, but date, the lack quantitative, nanoscale and statistical morphological information has hindered obtaining direct links device function. Here resonant X‐ray scattering microscopy are combined quantitatively measure domain size, distribution composition in high efficiency cells based on PTB7 PC 71 BM. results show that solvent additive diiodooctane dramatically shrinks size pure fullerene agglomerates...
Organic photovoltaic (OPV) cells using BTR:PC<sub>71</sub>BM show promising power conversion efficiency of >28% under 1000 lux generating 78.2 μW cm<sup>−2</sup>, outperforming Si based PV and comparable to GaAs cells. This result suggests that OPV have excellent potential for indoor applications.
A comparison of the efficiency, stability, and photophysics organic solar cells employing poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3'″-di(2-octyldodecyl)-2,2';5',2″;5″,2'″-quaterthiophen-5,5'″-diyl)] (PffBT4T-2OD) as a donor polymer blended with either nonfullerene acceptor EH-IDTBR or fullerene derivative, [6,6]-phenyl C71 butyric acid methyl ester (PC71 BM) electron acceptors is reported. Inverted PffBT4T-2OD:EH-IDTBR blend cell fabricated without any processing additive...
This review highlights the opportunities and challenges in stability of organic solar cells arising from emergence non-fullerene acceptors.
This work utilizes organic photovoltaics (OPV) for indoor applications, such as powering small electronic devices or wireless connected Internet of Things. Three representative polymer-based OPV systems, namely, poly(3-hexylthiophene-2,5-diyl), poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)], and poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]], were selected...
Abstract Ambient energy harvesting has great potential to contribute sustainable development and address growing environmental challenges. Converting waste from energy-intensive processes systems (e.g. combustion engines furnaces) is crucial reducing their impact achieving net-zero emissions. Compact harvesters will also be key powering the exponentially smart devices ecosystem that part of Internet Things, thus enabling futuristic applications can improve our quality life homes, cities,...
The poor operational stability of non-fullerene electron acceptor (NFA) organic solar cells (OSCs) currently limits their commercial application. While previous studies have primarily focused on the degradation NFA component, we also consider here donor material. We examine three representative polymers, PM6, D18, and PTQ10, paired with benchmark NFA, Y6. After light soaking PM6 D18 in air, find an enhanced conversion singlet excitons into trapped interchain polaron pairs sub-100 femtosecond...
Environmental stability is a common challenge for the commercialisation of low cost, encapsulation-free organic opto-electronic devices.
Recent progress in the development of OPVs, PPVs and QDPVs for indoor applications.
Abstract Realizing bicontinuous fibrillar charge transport networks in the photoactive layer has been considered a promising method to achieve high‐efficiency organic solar cells (OSCs); however, this rarely achieved due interference of molecular organization donor and acceptor components during solution casting. In contribution, fibrillization polymer PM6 small nonfullerene L8‐BO is realized with assistance conjugated D18‐Cl. Atomic force microscopy photo‐induced reveal that D18‐Cl...
Abstract Typical bulk‐heterojunction organic photovoltaics (OPV) suffer from instability due to the slowly diffusing small‐molecule acceptors (SMAs) under operational conditions. The originally well‐phase‐separated morphology will undergo SMA self‐aggregation form over‐purified domains that deteriorate OPV performance. This issue can be partially alleviated in sequentially processed cells with a planar‐mixed heterojunction absorber, which is intrinsically more robust larger domain sizes and...
Abstract Colloidal metal chalcogenide quantum dots (QDs) have excellent efficiency in light–matter interactions and good device stability. However, QDs been brought to the forefront as viable building blocks bottom‐up assembling semiconductor devices, development of QD solar cell (QDSC) is still confronting considerable challenges compared other technologies due their low performance under natural sunlight, a consequence untapped potential from quantized density‐of‐state inorganic natures....
Abstract Cesium lead triiodide (CsPbI 3 ) inorganic perovskite possesses excellent thermal stability and matched bandgap for silicon‐based tandem photovoltaics. The solution method with high‐temperature annealing process CsPbI film preparation creates challenges to scalable application conformal growth on the textured silicon. Although additives can decrease temperature, it will introduce undesired organic components increase material cost. Thermal co‐evaporation has intrinsic advantages...
With the advent of nonfullerene acceptors (NFAs), organic photovoltaic (OPV) devices are now achieving high enough power conversion efficiencies (PCEs) for commercialization. However, these performances rely on active layers processed from petroleum-based and toxic solvents, which undesirable mass manufacturing. Here, we demonstrate use biorenewable 2-methyltetrahydrofuran (2MeTHF) cyclopentyl methyl ether (CPME) solvents to process donor: NFA-based OPVs with no additional additives in...
A key consideration for the efficient operation of hybrid solar cells based upon conjugated polymers and inorganic semiconductor nanocrystals is charge transport in nanocrystal phase. Here we report results a study into kinetics polymer/nanocrystal on blends poly(3-hexylthiophene) (P3HT) with either CdSe nano-dots or nano-tetrapods. Transient photocurrent measurements reveal significant differences nano-dot nano-tetrapod cells, collection P3HT/CdSe device severely limited by trapping. In...
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,...
In this study, we investigate the role of thiophene fluorination in a low-bandgap polymer for organic photovoltaic applications. We use combined theoretical and experimental approach to charge generation recombination dynamics, their correlation with blend microstructure dipole moment. find that results an increased change moment upon exciton formation, which is correlated appearance charge-transfer excitons, as evidenced from ultrafast transient absorption studies. Fluorination also smaller...
Modification of the HTL helps to attain a high built-in potential (<italic>V</italic><sub>0</sub>) across BHJ by suppressing interfacial reaction at HTL/BHJ interface. It is critical retain and steady <italic>V</italic><sub>0</sub> obtain efficient stable nonfullerene OSCs.
A high fullerene molecular miscibility of over 40 wt % is found in the copolymer poly((4,4-octyldithieno(3,2-b:2′,3′-d)silole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,7-diyl) (PSBTBT-08)—a member PSBTBT low-bandgap polymer family that have produced power conversion efficiencies as 5.9% solar cells. This observation suggests plays a key role photovoltaic effect this system. The level additionally measured to be highly dependent on species with significant differences between C60- and...
Zn(II) complexes of the following new, fluorine-containing, benzothiazole-derived ligands have been synthesized and characterized crystallographically: 2-(3,3,3-trifluoro-2-oxopropyl)benzothiazole (3), 4,5,6,7-tetrafluoro-2-(3,3,3-trifluoro-2-oxopropyl)benzothiazole (4), 4,5,6,7-tetrafluoro-2-(2-hydroxyphenyl)benzothiazole (12), 2-(3,4,5,6-tetrafluoro-2-hydroxyphenyl)-4,5,6,7-tetrafluorobenzothiazole (13), 2-(3,4,5,6-tetrafluoro-2-hydroxyphenyl)benzothiazole (16); Cu(II) complex ligand 4 is...
Abstract Different to fluorescent and phosphorescent counterparts, white thermally activated delayed fluorescence (TADF) involves in multiple reverse intersystem crossing (RISC), leading the correlation but competition between blue other color components both singlet triplet allocations. Herein, three TADF emitters SSFAPO, DSFAPO, TSFAPO, collectively named x SFAPO are developed, featuring a moderately electron‐withdrawing phosphine oxide (PO) acceptor respectively linked 1‐3 donors....
Existing proton exchange membranes have the disadvantages of low conductivity at high temperature, cost, and poor barrier properties. Montmorillonite (MMT) materials excellent thermal chemical stability, two-dimensional nanostructures formed by exfoliated MMT show conductivity. Therefore, they are expected to become new membrane materials. However, existing exfoliation methods still lack a unified theoretical guidance. In this work, we systematically investigate detailed swelling properties...
Blue quantum dot (QD) light-emitting diodes (QLEDs) exhibit unsatisfactory operational stability and electroluminescence (EL) properties due to severe nonradiative recombination induced by large numbers of dangling bond defects charge imbalance in QD. Herein, dipolar aromatic amine-functionalized molecules with different molecular polarities are employed regulate transport passivate interfacial between QD the electron transfer layer (ETL). The results show that stronger polarity, especially...