A5018472755- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Solid-state spectroscopy and crystallography
- 2D Materials and Applications
- Advanced Fiber Laser Technologies
- Nanofabrication and Lithography Techniques
- Solid State Laser Technologies
- Dyeing and Modifying Textile Fibers
- Bone and Joint Diseases
- Electronic and Structural Properties of Oxides
- Transition Metal Oxide Nanomaterials
- Cultural Heritage Materials Analysis
- Thermal Radiation and Cooling Technologies
- Random lasers and scattering media
- Pigment Synthesis and Properties
- Laser-Matter Interactions and Applications
- Physical Unclonable Functions (PUFs) and Hardware Security
- Luminescence and Fluorescent Materials
- Advancements in Photolithography Techniques
- MXene and MAX Phase Materials
- Microbial Natural Products and Biosynthesis
Great Bay University
2025
Hong Kong Polytechnic University
2025
Hong Kong Baptist University
2022-2024
University of Macau
2019-2024
Jishou University
2023
Jiangnan University
2021
Peking University
2014-2018
Brown University
2017
National Renewable Energy Laboratory
2017
Collaborative Innovation Center of Quantum Matter
2016
The highest power conversion efficiencies (PCEs) reported for perovskite solar cells (PSCs) with inverted planar structures are still inferior to those of PSCs regular structures, mainly because lower open-circuit voltages (Voc). Here we report a strategy reduce nonradiative recombination the devices, based on simple solution-processed secondary growth technique. This approach produces wider bandgap top layer and more n-type film, which mitigates recombination, leading an increase in Voc by...
During the past 6 years, perovskite solar cells have experienced a rapid development and shown great potential as next‐generation photovoltaics. For with regular structure (n‐i‐p structure), device efficiency has reached over 20% after intense efforts of researchers from all world. Recently, inverted (p‐i‐n structure) been becoming more attractive, owing to their easy‐fabrication, cost‐effectiveness, suppressed hysteresis characteristics. Some recent progress in performance stability...
The past 5 years have witnessed the rise of highly efficient organometal halide perovskite-based solar cells. In conventional perovskite cells, compact n-type metal oxide film is always required as a blocking layer on transparent conducting (TCO) substrate for electron-selective contact. this work, an interface engineering approach demonstrated to avoid deposition film. Alkali salt solution was used modify TCO surface achieve optimized energy level alignment, resulting in A remarkable power...
The charge-carrier balance strategy by interface engineering is employed to optimize the transport in inverted planar heterojunction perovskite solar cells. N,N-Dimethylformamide-treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) and poly(methyl methacrylate)-modified PCBM are utilized as hole electron selective contacts, respectively, leading a high power conversion efficiency of 18.72%.
Organic–inorganic lead halide perovskites are emerging materials for the next‐generation photovoltaics. Lead halides most commonly used precursors perovskite active layers. Recently, acetate (Pb(Ac) 2 ) has shown its superiority as potential replacement traditional halides. Here, we demonstrate a strategy to improve efficiency solar cell based on precursor. We utilized methylammonium bromide an additive in Pb(Ac) and iodide precursor solution, resulting uniform, compact pinhole‐free films....
Osteoarthritis (OA) is an age-related metabolic disease. Low-grade inflammation and oxidative stress are the last common pathway of OA. α-ketoglutarate (α-KG) essential physiological metabolite from mitochondrial tricarboxylic acid (TCA) cycle, with multiple functions, including anti-inflammation antioxidation, exhibits decreased serum levels age. Herein, we aimed to investigate effect mechanism α-KG on We first quantified in human cartilage tissue osteoarthritic chondrocytes induced by...
Inverted perovskite solar cells (PSCs) have gained rapid progress and increasing research interest in recent years. The poly (triarylamine) (PTAA) is the most frequently used semiconductor hole-transporting layer (HTL) inverted PSCs for its favorable highest occupied molecular orbital energy level (-5.2 eV), excellent carrier mobility, low-temperature solution processability. However, intrinsic hydrophobic property hinders growth of high-quality on PTAA film, which one main obstacles that...
Optomechanical reliability has emerged as an important criterion for evaluating the performance and commercialization potential of perovskite solar cells (PSCs) due to mechanical-property mismatch metal halide perovskites with other device layer. In this work, grain-boundary grooves, a rarely discussed film microstructural characteristic, are found impart significant effects on optomechanical perovskite-substrate heterointerfaces thus PSC performance. By pre-burying iso-butylammonium...
Intragrain impurities can impart detrimental effects on the efficiency and stability of perovskite solar cells, but they are indiscernible to conventional characterizations thus remain unexplored. Using in situ scanning transmission electron microscopy, we reveal that intragrain impurity nano-clusters inherited from either solution synthesis or post-synthesis storage revert perovskites upon irradiation stimuli, leading counterintuitive amendment crystalline grains. In conjunction with...
The highest efficiencies reported for perovskite solar cells so far have been obtained mainly with methylammonium and formamidinium mixed cations. Currently, high-quality mixed-cation thin films are normally made by use of antisolvent protocols. However, the widely used "antisolvent"-assisted fabrication route suffers from challenges such as poor device reproducibility, toxic hazardous organic solvent, incompatibility scalable process. Here, a simple dual-source precursor approach is...
Metal halide perovskite films are endowed with the nature of ions and polycrystallinity. Formamidinium iodide (FAI)-based films, which include large cations (FA) incorporated into crystal lattice, most likely to induce local defects due presence unreacted FAI species. Here, a diboron-assisted strategy is demonstrated control induced by both inside grain boundaries at surface regions. The diboron compound (C12 H10 B2 O4 ) can selectively react FAI, leading reduced defect densities....
A mesoporous PbI2 scaffold is demonstrated to achieve high-performance planar heterojunction perovskite solar cells. remarkable power conversion efficiency (PCE) of 15.7% achieved under AM1.5G 100 mW cm−2 irradiation with almost no hysteresis. The morphologies the scaffolds can be programmed by a controlled nucleation and growth mechanism. Correlations between film morphology device performance are established. As service our authors readers, this journal provides supporting information...
The δ → α phase transformation is a crucial step in the solution-growth process of formamidinium-based lead triiodide (FAPbI3) hybrid organic–inorganic perovskite (HOIP) thin films for solar cells (PSCs). Because addition cesium (Cs) stabilizes FAPbI3-based HOIPs, here our research focuses on FAPbI3(Cs) films. We show that having large grain size δ-FAPbI3(Cs) non-perovskite intermediate essential growth high-quality α-FAPbI3(Cs) HOIP Here coarsening and occur simultaneously during thermal...
Abstract Perovskite solar cells (PSCs) are considered one of the most promising next‐generation examples high‐tech photovoltaic energy converters, as they possess an unprecedented power conversion efficiency with low cost. A typical high‐performance PSC generally contains a perovskite active layer sandwiched between electron‐transport (ETL) and hole‐transport (HTL). The ETL HTL contribute to charge extraction in PSC. However, these additional two layers complicate manufacturing process raise...
CF<sub>3</sub>PEAI, an amphipathic passivation agent, can passivate multiple perovskite defects leading to high performance and stability of solar cells.
Abstract Formamidinium (FA)‐based lead iodide perovskites have emerged as the most promising light‐absorber materials in prevailing perovskite solar cells (PSCs). However, they suffer from phase‐instability issue ambient atmosphere, which is holding back realization of full potential FA‐based PSCs context high efficiency and stability. Herein, tetraethylorthosilicate hydrolysis process integrated with solution crystallization perovskites, forming a new film structure individual grains...
Abstract As a mature strategy for constructing microstructures, patterning technologies are widely used in the optoelectronic field to satisfy requirements of functional and/or aesthetic purposes. With emergence organic–inorganic hybrid perovskites, applying perovskites can further optimize properties perovskite‐based devices, thereby enhancing their competitiveness commercialization. To date, series perovskite methods and patterned devices have been reported consecutively, which exhibit...
Abstract With potential commercial applications, inverted perovskite solar cells (PSCs) have received wide‐spread attentions as they are compatible with tandem devices and processed at low‐temperature. Nevertheless, their efficiencies remain unsatisfactory due to insufficient film quality on hydrophobic hole transport layer limited hole‐blocking capability of the electron layer. Herein, 1,3,5‐Tris(1‐phenyl‐1H‐benzimidazol‐2‐yl)benzene (TPBi), an n‐type semiconductor, is incorporated into...
Abstract Two‐dimensional Ruddlesden−Popper (2DRP) perovskites have attracted intense research interest for optoelectronic applications, due to their tunable properties and better environmental stability than three‐dimensional counterparts. Furthermore, high‐performance photodetectors based on single‐crystal polycrystalline thin‐films 2DRP shown great potential practical application. However, the complex growth process of membranes uncontrollable phase distribution films hinder further...
2D perovskites based on Formamidinium (FA) hold the potential for excellent stability and a broad absorption range, making them attractive materials solar cells. However, FA-based produced via one-step processing exhibit poor crystallinity random quasi-quantum wells (QWs), leading to subpar photovoltaic performance. In this study, seed-induced growth approach is introduced employing MAPbCl3 BDAPbI4 in deposition of Dion-Jacobson perovskite films. This method yields high-quality films as...
The power conversion efficiencies (PCEs) of polycrystalline perovskite solar cells (PC–PSCs) have now reached a plateau after decade rapid development, leaving distinct gap from their Shockley-Queisser limit. To continuously mitigate the PCE deficit, nonradiative carrier losses resulting defects should be further optimized. Single-crystal perovskites are considered an ideal platform to study efficiency limit due intrinsically low defect density, as demonstrated in bulk single crystals....
In many optoelectronic applications, patterning is required for functional and/or aesthetic purposes. However, established photolithographic technique cannot be applied directly to the hybrid perovskites, which are considered as promising candidates applications. this work, a wettability-assisted photolithography (WAP) process, employs and one-step solution process deposit perovskite, was developed fabricating patterned perovskite films. Uniform pinhole-free films with sharp-edged...
Abstract Multiple ultrashort laser pulses are widely used in optical spectroscopy, optoelectronic manipulation, imaging and signal processing etc. The pulse multiplication, so far, is solely realized by using the setups or devices to modify output from gain medium. employment of these external techniques because medium itself incapable modifying multiplying generated pulse. Herein, with single femtosecond excitation, we achieve double-pulsed stimulated emission duration around 40 ps interval...