A5071807159- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Organic Light-Emitting Diodes Research
- Thin-Film Transistor Technologies
- Molecular Junctions and Nanostructures
- solar cell performance optimization
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Domain Adaptation and Few-Shot Learning
- Fullerene Chemistry and Applications
- Nanowire Synthesis and Applications
- Semiconductor materials and interfaces
- Multimodal Machine Learning Applications
- Silicon and Solar Cell Technologies
- COVID-19 diagnosis using AI
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Quantum Dots Synthesis And Properties
- Medical Image Segmentation Techniques
- Advanced battery technologies research
- Coal and Its By-products
- Organic and Molecular Conductors Research
- Geomechanics and Mining Engineering
- Radiomics and Machine Learning in Medical Imaging
Beijing National Laboratory for Molecular Sciences
2015-2024
Southeast University
2023-2024
State Key Laboratory of Polymer Physics and Chemistry
2015-2024
Chinese Academy of Sciences
2015-2024
University of Southampton
2024
Southeast University
2024
Hong Kong University of Science and Technology
2022-2024
China Pharmaceutical University
2023-2024
Institute of Chemistry
2014-2023
University of Hong Kong
2022-2023
A new polymer donor (PBDB-T-SF) and a small molecule acceptor (IT-4F) for fullerene-free organic solar cells (OSCs) were designed synthesized. The influences of fluorination on the absorption spectra, molecular energy levels, charge mobilities systematically studied. PBDB-T-SF:IT-4F-based OSC device showed record high efficiency 13.1%, an over 12% can be obtained with thickness 100-200 nm, suggesting promise OSCs in practical applications.
Optimizing the molecular structures of organic photovoltaic (OPV) materials is one most effective methods to boost power conversion efficiencies (PCEs). For an excellent system with a certain conjugated skeleton, fine tuning alky chains considerable significance fully explore its potential. In this work, optimization alkyl performed on chlorinated nonfullerene acceptor (NFA) named BTP-4Cl-BO (a Y6 derivative) and very impressive parameters in OPV cells are obtained. To get more ordered...
Broadening the optical absorption of organic photovoltaic (OPV) materials by enhancing intramolecular push-pull effect is a general and effective method to improve power conversion efficiencies OPV cells. However, in terms electron acceptors, most common molecular design strategy halogenation usually results down-shifted energy levels, thereby leading decreased open-circuit voltages devices. Herein, we report chlorinated non-fullerene acceptor, which exhibits an extended meanwhile displays...
Abstract Improving power conversion efficiency (PCE) is important for broadening the applications of organic photovoltaic (OPV) cells. Here, a maximum PCE 19.0% (certified value 18.7%) achieved in single‐junction OPV cells by combining material design with ternary blending strategy. An active layer comprising new wide‐bandgap polymer donor named PBQx‐TF and low‐bandgap non‐fullerene acceptor (NFA) eC9‐2Cl rationally designed. With optimized light utilization, resulting binary cell exhibits...
Abstract The design of narrow band gap (NBG) donors or acceptors and their application in organic solar cells (OSCs) are great importance the conversion photons to electrons. Limited by inevitable energy loss from optical photovoltaic material open‐circuit voltage OSC device, improvement power efficiency (PCE) NBG‐based OSCs faces challenges. A novel acceptor–donor–acceptor structured non‐fullerene acceptor is reported with an ultra‐narrow 1.24 eV, which was achieved enhanced intramolecular...
To make organic solar cells (OSCs) more competitive in the diverse photovoltaic cell technologies, it is very important to demonstrate that OSCs can achieve good efficiencies and their cost be reduced. Here, a pair of nonfullerene small-molecule acceptors, IT-2Cl IT-4Cl, designed synthesized by introducing easy-synthesis chlorine substituents onto indacenodithieno[3,2-b]thiophene units. The unique feature large dipole moment CCl bond enhances intermolecular charge-transfer effect between...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHighly Efficient 2D-Conjugated Benzodithiophene-Based Photovoltaic Polymer with Linear Alkylthio Side ChainLong Ye†‡, Shaoqing Zhang†, Wenchao Zhao†, Huifeng Yao†‡, and Jianhui Hou*†View Author Information† State Key Laboratory of Physics Chemistry, Beijing National for Molecular Sciences, Institute Chinese Academy 100190, China‡ University 100049, China*E-mail: [email protected]Cite this: Chem. Mater. 2014, 26, 12, 3603–3605Publication Date...
Abstract The development of organic photoactive materials, especially the newly emerging non-fullerene electron acceptors (NFAs), has enabled rapid progress in photovoltaic (OPV) cells recent years. Although power conversion efficiencies (PCEs) top-performance OPV have surpassed 16%, devices are usually fabricated via a spin-coating method and not suitable for large-area production. Here, we demonstrate that fine-modification flexible side chains NFAs can yield 17% PCE cells. More crucially,...
Abstract Recent advances in nonfullerene acceptors (NFAs) have enabled the rapid increase power conversion efficiencies (PCEs) of organic photovoltaic (OPV) cells. However, this progress is achieved using highly toxic solvents, which are not suitable for scalable large‐area processing method, becoming one biggest factors hindering mass production and commercial applications OPVs. Therefore, it great importance to get good eco‐compatible processability when designing efficient OPV materials....
Although significant improvements have been achieved for organic photovoltaic cells (OPVs), the top-performing devices still show power conversion efficiencies far behind those of commercialized solar cells. One main reasons is large driving force required separating electron–hole pairs. Here, we demonstrate an efficiency 14.7% in single-junction OPV by using a new polymer donor PTO2 and nonfullerene acceptor IT-4F. The device possesses efficient charge generation at low force. Ultrafast...
A novel non-fullerene acceptor, possessing a very low bandgap of 1.34 eV and high-lying lowest unoccupied molecular orbital level -3.95 eV, is designed synthesized by introducing electron-donating alkoxy groups to the backbone conjugated small molecule. Impressive power conversion efficiencies 8.4% 10.7% are obtained for fabricated single tandem polymer solar cells.
Fabricating organic solar cells (OSCs) with a tandem structure has been considered an effective method to overcome the limited light absorption spectra of photovoltaic materials. Currently, most efficient OSCs are fabricated by adopting fullerene derivatives as acceptors. In this work, we designed new non-fullerene acceptor optical band gap (Egopt) 1.68 eV for front subcells and optimized phase-separation morphology fullerene-free active layer Egopt 1.36 fabricate rear subcell. The two show...
Ternary blending and copolymerization strategies have proven advantageous in boosting the photovoltaic performance of organic solar cells. Here, 15% efficiency cells using donors are demonstrated, where electron-withdrawing unit, ester-substituted thiophene, is incorporated into a PBDB-TF polymer to downshift molecular energy broaden absorption. Copolymer-based suitable for large-area devices can be fabricated by blade-coating method from nonhalogen nonaromatic solvent mixture. Although...
Besides broadening of the absorption spectrum, modulating molecular energy levels, and other well-studied properties, a stronger intramolecular electron push-pull effect also affords advantages in nonfullerene acceptors. A strong improves dipole moment wings IT-4F over IT-M results lower miscibility than when blended with PBDB-TF. This feature leads to higher domain purity PBDB-TF:IT-4F blend makes contribution better photovoltaic performance. Moreover, decreases vibrational relaxation,...
Recent advances in the material design and synthesis of nonfullerene acceptors (NFAs) have revealed a new landscape for polymer solar cells (PSCs) boosted power conversion efficiencies (PCEs) to over 15%. Further improvements photovoltaic performance are significant challenge NFA-PSCs based on binary donor:acceptor blends. In this study, ternary PSCs fabricated by incorporating fullerene derivative, PC61 BM, into combination donor (PBDB-TF) fused-ring NFA (Y6) very high PCE 16.5% (certified...
A new acceptor-donor-acceptor-structured nonfullerene acceptor ITCC (3,9-bis(4-(1,1-dicyanomethylene)-3-methylene-2-oxo-cyclopenta[b]thiophen)-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d':2,3-d']-s-indaceno[1,2-b:5,6-b']-dithiophene) is designed and synthesized via simple end-group modification. shows improved electron-transport properties a high-lying lowest unoccupied molecular orbital level. power conversion efficiency of 11.4% with an impressive V OC over 1 recorded in photovoltaic...
Semitransparent organic solar cells (OSCs) show attractive potential in power-generating windows. However, the development of semitransparent OSCs is lagging behind opaque OSCs. Here, an ultralow-bandgap nonfullerene acceptor, "IEICO-4Cl", designed and synthesized, whose absorption spectrum mainly located near-infrared region. When IEICO-4Cl blended with different polymer donors (J52, PBDB-T, PTB7-Th), colors blend films can be tuned from purple to blue cyan, respectively. Traditional a...
Manipulating molecular orientation at the donor/acceptor interface is key to boosting charge separation properties and efficiencies of anisotropic-materials-based organic photovoltaics (OPVs). By replacing polymeric donor PBDTBDD with its 2D-conjugated polymer PBDTBDD-T, power conversion efficiency OPVs featuring anisotropic acceptor PNDI drastically boosted from 2.4% up 5.8%.
Recently, the benzodithiophene- (BDT-) based polymers with conjugated side groups attracted considerable attention due to their superior properties in polymer solar cells (PSCs), so investigation of chain effects on photovoltaic this type is an interesting and important topic for molecular design. Herein, three BDT thieno[3,4-b]thiophene units furan, thiophene selenophene as groups, named PBDTTT-EFF, PBDTTT-EFT, PBDTTT-EFS, were synthesized applied cells. The characterized parallel by...
The power conversion efficiencies (PCEs) of flexible organic solar cells (OSCs) still lag behind those rigid devices and their mechanical stability is unable to meet the needs electronics at present due lack a high-performance transparent electrode (FTE). Here, so-called "welding" concept proposed design an FTE with tight binding upper underlying substrate. consisting solution-processed Al-doped ZnO (AZO) silver nanowire (AgNW) network well welded by utilizing capillary force effect...