A5041863125- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Advanced Sensor and Energy Harvesting Materials
- Nanowire Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Luminescence and Fluorescent Materials
- Advanced Materials and Mechanics
- Advanced Memory and Neural Computing
- Molecular Junctions and Nanostructures
- Quantum Information and Cryptography
- MXene and MAX Phase Materials
- Nanomaterials and Printing Technologies
- Chalcogenide Semiconductor Thin Films
- 2D Materials and Applications
- solar cell performance optimization
- Atomic and Subatomic Physics Research
- Thin-Film Transistor Technologies
- Organic Light-Emitting Diodes Research
- Quantum and electron transport phenomena
Wuhan National Laboratory for Optoelectronics
2018-2025
Huazhong University of Science and Technology
2018-2025
Owing to their insufficient light absorption and charge transport, 2D Ruddlesden-Popper (RP) perovskites show relatively low efficiency. In this work, methylammonium (MA), formamidinum (FA), FA/MA mixed perovskite solar cells (PSCs) are fabricated. Incorporating FA cations extends the range enhances absorption. Optical spectroscopy shows that substantially increase portion of 3D-like phase phases, X-ray diffraction (XRD) studies reveal FA-based possesses an oblique crystal orientation....
Abstract Low‐dimensional Ruddlesden–Popper perovskites (RPPs) exhibit excellent stability in comparison with 3D perovskites; however, the relatively low power conversion efficiency (PCE) limits their future application. In this work, a new fluorine‐substituted phenylethlammonium (PEA) cation is developed as spacer to fabricate quasi‐2D (4FPEA) 2 (MA) 4 Pb 5 I 16 ( n = 5) perovskite solar cells. The champion device exhibits remarkable PCE of 17.3% J sc 19.00 mA cm −2 , V oc 1.16 V, and fill...
Emerging wearable devices would benefit from integrating ductile photovoltaic light-harvesting power sources. In this work, we report a small-molecule acceptor (SMA), also known as non–fullerene (NFA), designed for stretchable organic solar cell ( s -OSC) blends with large mechanical compliance and performance. Blends of the organosilane-functionalized SMA BTP-Si4 polymer donor PNTB6-Cl achieved conversion efficiency (PCE) >16% ultimate strain (ε u ) >95%. Typical SMAs suppress OSC...
Abstract Stretchable organic solar cells (OSCs) simultaneously possessing high‐efficiency and robust mechanical properties are ideal power generators for the emerging wearable portable electronics. Herein, after incorporating a low amount of trimethylsiloxy terminated polydimethylsiloxane (PDMS) additive, intrinsic stretchability PTB7‐Th:IEICO‐4F bulk heterojunction (BHJ) film is greatly improved from 5% to 20% strain without sacrificing photovoltaic performance. The intimate multi‐layers...
Substituting the hydrogen atoms on conjugated side chain of a wide-bandgap polymer J52 with chlorine can simultaneously increase Jsc, Voc, and FF nonfullerene OSCs, leading to an efficiency boost from 3.78 11.53%, which is among highest efficiencies for as-cast OSCs reported date. To illustrate impressive 3-fold PCE enhancement, chlorination effect optical properties energy levels polymers, film morphology, underlying charge dynamics systematically investigated. Grazing incidence wide-angle...
Developing intrinsically stretchable organic solar cells (OSCs) with excellent mechanical robustness and long-term operation stability is highly demanded for practical applications. Here, the representative PM6/Y6 active layer film, crosslinked by a photo-crosslinkable small molecule 2,6-bis(4-azidobenzylidene)cyclohexanone (BAC) containing azide groups, exhibits significantly enhanced stretchability of 18% toughness 6.94 MJ m-3 , compared to non-crosslinked film (stretchability 4.5% 0.75 )....
Abstract Polarization‐sensitive photodetectors based on anisotropic semiconductors sense both the intensity and polarization state information without extra optical components. Here, a self‐powered organic photodetector (OPD) composed of intrinsically stretchable polymer donor PNTB6‐Cl non‐fullerene acceptor Y6 is reported. The PNTB6‐Cl:Y6 photoactive film accommodates remarkable 100% strain fracture, exhibiting high anisotropy 1.8 after alignment. resulting OPD not only shows an impressive...
Abstract Two-dimensional (2D) materials were widely used in sensing owing to the tunable physical or chemical properties. For years, optical attracted a massive amount of attention on account high accuracy, security, non-invasive measurement, and strong anti-interference ability. Among various schemes, multi-wavelength (MWOS) is an important branch adopted image, spectroscopy, bio/chemical research. However, no spectral selectivity, limited working wavelength range, intrinsic instability...
The applications of quasi-two-dimensional (quasi-2D) perovskite solar cells (PSCs) are limited by their insufficient charge transport, and the underlying transport mechanism is not clear yet. Herein, we report a simple strategy for achieving efficient in quasi-2D FPEA2MAn–1PbnI3n+1 (⟨n⟩ = 4) combining crystal orientation control via hot-casting method regulation phase composition distribution using methylammonium chloride (MACl) additives. steady transient optical spectra reveal that...
Superior mechanical properties of intrinsically stretchable organic solar cells (is-OSCs) are great importance to ensure long-term operational reliability, especially considering their potential application in wearable electronics and electronic skins. Herein, we have systematically investigated the morphology photovoltaic performance evolution polymer–small molecule (PBDB-T:PCBM) all-polymer (PBDB-T:N2200) blend films under strains fabricated semitransparent is-OSCs through a...
Flexible and stretchable organic solar cells (OSCs) show great promise in wearable electronic applications. However, current high-performance OSCs consisting of polymer donors (PDs) small-molecule acceptors (SMAs) face significant challenges achieving both high power conversion efficiency (PCE) excellent stretch-ability. In this study, we synthesized a new polymerized-small-molecule acceptor (P-SMA) PY-SiO featuring siloxane-terminated side chains compared its photovoltaic mechanical...
Near-infrared organic photodetectors (NIR OPDs) have gained widespread attention due to the rapidly growing demand for portable, lightweight, and low-cost sensors. However, development of high-performance NIR semiconductors remains challenging. Herein, we report two new ladder-type conjugated pyrrolic polysquaraines simply prepared by polycondensation, namely, PSQ-IDT PSQ-IDTT, which exhibit narrow optical band gaps 1.26 1.28 eV, respectively. Both good compatibility with PC61BM acceptor,...
Achieving high efficiency, mechanical robustness and long-term stability is crucial for practical application of organic solar cells (OSCs). Owing to the crystalline nature small molecule acceptors (SMAs), high-efficiency OSCs...
Fabricating large‐area uniform thin (about 100 nm) active layer films via solution processing is still challenging to realize efficient scalable organic photovoltaic (OPV) modules. In this work, we report a method fabricate with the help of Marangoni force engineering surface tension their solutions. Silicone oil was first adopted as an additive substantially reduce solutions from 34.8 20.6 mN/m. Large‐area (up 700 cm2) spread spontaneously on water by due increased difference between and...
Fabricating large‐area uniform thin (about 100 nm) active layer films via solution processing is still challenging to realize efficient scalable organic photovoltaic (OPV) modules. In this work, we report a method fabricate with the help of Marangoni force engineering surface tension their solutions. Silicone oil was first adopted as an additive substantially reduce solutions from 34.8 20.6 mN/m. Large‐area (up 700 cm2) spread spontaneously on water by due increased difference between and...
Stretchable antennas represent a pivotal innovation in enhancing wireless interconnection and driving the proliferation of Internet Things (IoT) applications. Eutectic Gallium-Indium (EGaIn) is an ideal conductor for stretchable antennas. However, inherent high surface tension fluidity EGaIn make patterning low-precision, time-consuming, failure-prone. Here wideband antenna presented by direct writing thermoplastic polyurethane-modified ink activated water-bath ultrasound. The exhibits...
Circularly polarized light (CPL) detection is crucial for optical communication, bioimaging and quantum computing. However, CPL detectors based on chiral low-dimensional perovskites face a trade-off between optoelectronic performance discrimination, typically exhibit response within narrow spectral range. Here, we overcome these limitations by integrating three-dimensional (3D) chiral-two-dimensional (2D) perovskites. The 3D perovskite serving as the photoabsorption layer extends range to...
Abstract High specific detectivity ( D *) is one of the key performance metrics for near‐infrared (NIR) organic photodetectors (OPDs), which however always limited by high dark current density J d ). Herein, high‐performance NIR‐OPDs with ultralow are successfully achieved developing new conjugated pyrrolic polysquaraines as photoactive materials. By changing linkage sites carbazole bridge, two low‐bandgap polysquaraines, i.e., PSQ‐3,6‐Cz and PSQ‐2,7‐Cz, prepared via a facile synthetic...
Low efficiency, poor stability, and lack of high-resolution patterning hinder the future commercialization perovskite light-emitting diodes (PeLEDs). Herein, we developed a spatial cross-linking photolithography strategy to fabricate quasi-2D films using pentaerythritol tetra(3-mercaptopropionate) (PETMP) allyl ether (PAE) as cross-linkers. These cross-linkers containing multiple sites facially form hydrophobic defect-passivating networks at grain boundaries surface perovskite, improving...
Stretchable organic solar cells are promising wearable power generators. Here, we synthesize a series of bithienyl-benzodithiophene- alt -fluorobenzotriazole copolymer (PBZ-2Si) with siloxane-terminated side chains, and compare J52 analogues to investigate chain effects on the photovoltaic mechanical properties. When different molecular weight ( M n ) PBZ-2Si, denoted as PBZ-2Si L , H blended N2200 acceptor, based all-polymer cell (all-PSC) shows an improved PCE 7.01% compared that (5.30%)....
Stretchable organic solar cells (OSCs) are promising wearable power generators. Here, we synthesize a series of the bithienyl-benzodithiophene-alt-fluorobenzotriazole copolymer (PBZ-2Si) with siloxane-terminated side chains, and compare J52 analogues to investigate chain effects on photovoltaic mechanical properties. When different molecular weight (Mn) PBZ-2Si denoted as PBZ-2SiL, PBZ-2SiM PBZ-2SiH blended representative N2200 acceptor, based all-polymer cell (all-PSC) shows an improved PCE...