A5067611451- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Organic Light-Emitting Diodes Research
- Advanced Photocatalysis Techniques
- 2D Materials and Applications
- Transition Metal Oxide Nanomaterials
- Organic Electronics and Photovoltaics
- TiO2 Photocatalysis and Solar Cells
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Advanced battery technologies research
- Acoustic Wave Resonator Technologies
- Layered Double Hydroxides Synthesis and Applications
- Ga2O3 and related materials
- Advanced Sensor and Energy Harvesting Materials
- Facial Nerve Paralysis Treatment and Research
- Luminescence and Fluorescent Materials
- Solid-state spectroscopy and crystallography
- Thin-Film Transistor Technologies
- Nanoplatforms for cancer theranostics
- Mosquito-borne diseases and control
- Nanoparticle-Based Drug Delivery
- Cholinesterase and Neurodegenerative Diseases
Nanjing Tech University
2023-2025
The Synergetic Innovation Center for Advanced Materials
2023-2025
Hong Kong Polytechnic University
2007-2025
Chenzhou First People's Hospital
2025
National Institute of Science Education and Research
2023
The University of Texas at Austin
2023
Technische Universität Berlin
2023
Aristotle University of Thessaloniki
2023
Bose Institute
2023
Central South University
2023
Tin-based perovskites with excellent optoelectronic properties and suitable band gaps are promising candidates for the preparation of efficient lead-free perovskite solar cells (PSCs). However, it is challenging to prepare highly stable tin-based PSCs because Sn2+ in can be easily oxidized Sn4+ upon air exposure. Here we report fabrication air-stable FASnI3 by introducing hydroxybenzene sulfonic acid or its salt as an antioxidant additive into precursor solution along excess SnCl2 . The...
This work provides a comprehensive review on strategies like reducing agents, morphology control, compositional engineering and device for fabricating efficient stable tin-based perovskite solar cells.
The quality of perovskite films is critical to the performance solar cells. However, it challenging control crystallinity and orientation solution-processed films. Here, solution-phase van der Waals epitaxy growth MAPbI3 on MoS2 flakes reported. Under transmission electron microscopy, in-plane coupling between crystal lattices observed, leading with larger grain size, lower trap density, preferential along (110) normal surface. In cells, when active layers are grown coated hole-transport...
Abstract Graded bulk-heterojunction (G-BHJ) with well-defined vertical phase separation has potential to surpass classical BHJ in organic solar cells (OSCs). In this work, an effective G-BHJ strategy via nonhalogenated solvent sequential deposition is demonstrated using nonfullerene acceptor (NFA) OSCs. Spin-coated OSCs deliver outstanding 17.48% power conversion efficiency (PCE). Depth-profiling X-ray photoelectron spectroscopy (DP-XPS) and angle-dependent grazing incidence diffraction...
Ultrafast laser-annealing technique for the fabrication of large-grain perovskite films and efficient solar cells at room temperature.
Maintaining the stability of tin halide perovskites is a major challenge in developing lead-free perovskite solar cells (PSCs). Adding extra SnX2 (X = F, Cl, or Br) precursor solution to inhibit Sn2+ oxidation an essential strategy improve device efficiency and stability. However, on surface grains tends prohibit charge transfer across films. Here, we report coadditive engineering approach by introducing antioxidant gallic acid (GA) together with SnCl2 performance tin-based PSCs. The...
Sn-Pb mixed perovskites with bandgaps in the range of 1.1-1.4 eV are ideal candidates for single-junction solar cells to approach Shockley-Queisser limit. However, efficiency and stability mixed-perovskite (PSCs) still lag far behind those Pb-based counterparts due easy oxidation Sn2+ . Here, a reducing agent 4-hydrazinobenzoic acid is introduced as an additive along SnF2 suppress Meanwhile, vertical Pb/Sn compositional gradient formed spontaneously after antisolvent treatment different...
Abstract Perovskite solar cells (PSCs) have emerged as the next generation photovoltaic technology due to their high power conversion efficiency and solution‐based fabrication process. The performance of PSCs relies on composition each layer interface properties between layers. Hence, integration novel materials into presents a viable strategy for enhancing device performance. Metal–organic frameworks (MOFs) covalent organic (COFs) recently promising improving stability PSCs. These offer...
Bi-functional ammonium hypophosphite (AHP) is introduced to improve the performance and long term stability of FASnI<sub>3</sub> solar cells.
Organic–inorganic metal halide perovskite solar cells (PSCs) have attracted much research interest owing to their high power conversion efficiency (PCE), solution processability, and the great potential for commercialization. However, device performance is closely related quality of film interface properties, which cannot be easily controlled by processes. Here, 2D WS2 flakes with defect-free surfaces are introduced as a template van der Waals epitaxial growth mixed films process first...
Abstract Grain boundaries in organic–inorganic halide perovskite solar cells (PSCs) have been found to be detrimental the photovoltaic performance of devices. Here, we develop a unique approach overcome this problem by modifying edges grain with flakes high-mobility two-dimensional (2D) materials via convenient solution process. A synergistic effect between 2D and is observed for first time, which can significantly enhance PSCs. We find that conduct holes from hole transport layers PSCs,...
Abstract 2D Ruddlesden–Popper perovskites have attracted wide attention recently because of tunable optoelectronic properties and been used as alternatives to their 3D counterparts in various devices. Here, a series (PEA) 2 (MA) n −1 Pb I 3 +1 perovskite thin films is designed fabricated by convenient hot‐casting method obtain gradient the films, which leads formation vertical heterojunctions that can enhance charge separation under light illumination. Based on single film, highly sensitive...
Abstract 2D–3D mixed tin halide perovskites are outstanding candidate materials for lead‐free perovskite solar cells (PSCs) due to their improved stability and decreased trap density in comparison with pure 3D counterparts. However, the mixture of multiple phases may lead poor charge transfer across films limit device efficiency. Here, a stacked quasi‐2D (down)–3D (top) double‐layered structure prepared via vacuum treatment is demonstrated, which can result planar bilayer heterojunction. In...
Abstract Triple‐cation mixed perovskites have attracted much attention recently owing to their prominent optoelectronic properties and good stability for perovskite solar cells. However, the introduction of those cations with different sizes in materials will drive lattice away from ideal cubic structure lead microstrain resultant films. Herein,a small amount KBF 4 as an additive elevate quality triple‐cation thin films is introduced. It found that can enhance crystallinity alleviate...
Tin (Sn)-based perovskites with favorable optoelectronic properties and ideal bandgaps have emerged as promising alternatives to toxic lead (Pb)-based for photovoltaic applications. However, it is challenging obtain high-quality Sn-based perovskite films by solution process. Here, liquid-exfoliated 2D transition-metal dichalcogenides (i.e., MoS2 , WS2 WSe2 ) smooth defect-free surfaces are applied growth templates spin-coated FASnI3 films, leading van der Waals epitaxial of grains a...
Abstract Metal halide perovskite solar cells (PSCs) have become one of the most promising next‐generation photovoltaic technologies due to their low‐cost fabrication, solution processability, and superior optoelectronic properties. Although state‐of‐art PSCs demonstrate a power conversion efficiency record comparable that silicon cells, there are still many challenges toward commercialization. devices based on various semiconductor heterojunctions all play important roles in device...
Although the power conversion efficiency values of perovskite solar cells continue to be refreshed, it is still far from theoretical Shockley-Queisser limit. Two major issues need addressed, including disorder crystallization and unbalanced interface charge extraction, which limit further improvements in device efficiency. Herein, we develop a thermally polymerized additive as polymer template film, can form monolithic grain unique "Mortise-Tenon" structure after spin-coating hole-transport...
Abstract Mixed Sn–Pb perovskites with narrow bandgaps and high optical absorption coefficients are promising photovoltaic materials. However, the easy oxidation of Sn 2+ fast crystallization mixed still limit efficiency perovskite solar cells (PSCs). Here, an imidazole derivative 2‐(Aminomethyl)imidazole dihydrochloride (2‐AD) to suppress improve film quality through coordination /Pb ions is introduced. The optimized devices show a power conversion 22.31% outstanding long‐term illumination...
Abstract Organic‐inorganic halide perovskite solar cells (PSCs) are emerging new generation cost‐effective photovoltaic technology. However, the public concern about toxic lead contained in state‐of‐art PSCs has cast a shadow on their prospect for commercialization. Therefore, increasing attention been paid to lead‐free tin‐based perovskites, which have potential achieve comparable performance lead‐based counterparts. development of high‐performance is seriously undermined by intrinsic poor...
Photodetectors (PDs) are the building block of various imaging and sensing applications. However, commercially available PDs based on crystalline inorganic semiconductors cannot meet requirements emerging wearable/implantable applications due to their rigidity fragility, which creates need for flexible devices. Here, a high-performance PD is presented by gating an organic electrochemical transistor (OECT) with perovskite solar cell. Due ultrahigh transconductance OECT, device demonstrates...
Two-dimensional conjugated metal–organic framework (2D c-MOF) Cu3(HHTT)2 (2,3,7,8,12,13-hexahydroxytetraazanaphthotetraphene, HHTT) is found to be an ideal hole transport material for Pb–Sn perovskite solar cells (PSCs) the first time. 2D c-MOF films are conveniently prepared by a self-assembly deposition method and used in ideal-bandgap mixed PSCs. The ultrasmooth surface of film can facilitate growth enable defect passivation on surface. approach suitable preparing large-area conformally...
Abstract Flexible perovskite solar cells (PSCs) have drawn increasing attention due to their promising applications for wearable electronics and aerospace applications. However, the efficiency stability of flexible PSCs still lag behind rigid counterparts. Here, we use N,N-dimethyl acrylamide (DMAA) in situ synthesize cross-linking polymer Sn–Pb mixed PSCs. DMAA can gather at grain boundary as a scaffold regulate crystallization reduce defects. The showed efficiencies 16.44% 15.44%,...
Abstract There is considerable interest in photodetectors based on nontoxic lead‐free perovskites. Tin‐based perovskites have been regarded as one type of the most promising candidate materials for these devices due to their relatively low bandgap and high light absorption coefficient. In this work, a stacked 2D/3D heterostructure perovskite films achieved through convenient vacuum drying process, which results an ultrahigh responsivity up 6.8 × 10 5 A W −1 detectivity 4.0 14 Jones at gate...
Abstract Hybrid halide perovskite films are becoming increasingly efficient in various applications, but several challenges still remain to be overcome. In this study, thermally polymerized additive N‐vinyl‐2‐pyrrolidone (NVP) is utilized tune the crystallization and orientation of mixed organo‐metal films. Using situ spectroscopy, it demonstrated that NVP plays a crucial role prolonging process separating nucleation crystal growth by forming an NVP‐precursor intermediate phase....