A5026093852- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Organic Electronics and Photovoltaics
- 2D Materials and Applications
- Organic Light-Emitting Diodes Research
- Advanced Photocatalysis Techniques
- Copper-based nanomaterials and applications
- ZnO doping and properties
- Advanced battery technologies research
- Coral and Marine Ecosystems Studies
- Thin-Film Transistor Technologies
- Force Microscopy Techniques and Applications
- Thermal Expansion and Ionic Conductivity
- Semiconductor materials and devices
- Semiconductor materials and interfaces
- Advanced Battery Materials and Technologies
- Catalysis and Oxidation Reactions
- Advanced Materials Characterization Techniques
- Transition Metal Oxide Nanomaterials
- Vitamin D Research Studies
- Food composition and properties
- Bariatric Surgery and Outcomes
Peking University
2016-2025
Yibin University
2025
Capital Medical University
2024
Beijing National Laboratory for Molecular Sciences
2006-2022
University of Hong Kong
2006-2022
State Key Laboratory of Rare Earth Materials Chemistry and Application
2006-2022
Ministry of Education of the People's Republic of China
2022
Nanjing Forestry University
2022
Battery Park
2020
Ministry of Education
2020
A redox road to recovery Device longevity is a key issue for organic-inorganic perovskite solar cells. Encapsulation can limit degradation arising from reactions with oxygen and water, but light, electric-field, thermal stresses lead metastable elemental halide atom defects. Wang et al. show that the lead-iodine system, introduction of rare earth europium ion pair Eu 3+ -Eu 2+ shuttle electrons recover iodine ions (Pb I − ). Devices incorporating this maintained more than 90% their initial...
The mixed halide perovskites have emerged as outstanding light absorbers for efficient solar cells. Unfortunately, it reveals inhomogeneity in these polycrystalline films due to composition separation, which leads local lattice mismatches and emergent residual strains consequently. Thus far, the understanding of their effects on photovoltaic device performance is absent. Herein we study evolution strain over by depth-dependent grazing incident X-ray diffraction measurements. We identify...
To improve the photovoltaic performance (both efficiency and stability) in hybrid organic-inorganic halide perovskite solar cells, lattice distortion is investigated with regards to residual stress (and strain) polycrystalline thin films. It revealed that concentrated at surface of as-prepared film, an efficient method further developed release this interfacial by A site cation alloying. This results reconstruction films, which turn low elastic modulus. Thus, a "bone-joint" configuration...
Evening out the heat The conversion of precursors into active layer perovskite solar cells normally occurs by heating underlying substrate. Conversion tends to occur near top film, where solvent is lost, and unwanted preheating reactants substrate before reaction. Li et al . show that use a surrounding transfer oil (anisole) leads more rapid even heating, removes solvent, avoids air water contamination effects. larger grains uniform films led much greater retention efficiency in moving from...
The power conversion efficiency of organic-inorganic hybrid perovskite solar cells has increased rapidly, but the device stability remains a big challenge. Previous studies show grain boundary (GB) can facilitate ion migration and initiate degradation. Herein, methimazole (MMI) is employed for first time to construct surface "patch" by in situ converting residual PbI
Abstract Further minimizing the defect state density in semiconducting absorber is vital to boost power conversion efficiency of solar cells approaching Shockley-Queisser limit. However, it lacks a general strategy control precursor chemistry for defects reduction family iodine based perovskite. Here alkaline environment solution carefully investigated as an effective parameter suppress incident and affects crystallization kinetics during film fabrication, via rationale adjustment alkalinity...
Crystal orientations in multiple orders correlate to the properties of polycrystalline materials, and it is critical manipulate these microstructural arrangements enhance device performance. Herein, we report a controllable approach facet orientation within ABX3 hybrid perovskites films by cation cascade doping at A-site. Two-dimensional synchrotron radiation grazing incidence wide-angle X-ray scattering employed probe crystal mixed thin films, revealing general pattern guide planes stacking...
Here, a low-temperature solution-processed nickel oxide (NiO<sub>x</sub>) thin film was first employed as hole transport layer in both inverted (p-i-n) planar and regular (n-i-p) mesoscopic organic–inorganic hybrid perovskite solar cells (PVSCs).
Novel structure-engineered amorphous oxide semiconductor thin-film transistors using a solution process to overcome the trade-off between high mobility and other parameters (i.e., on/off ratio, sub-threshold voltage swing, threshold voltage, so on) are proposed. High performance confining AOS TFTs successfully demonstrated, which utilize specially designed layer with ultra-high density electron mobility.
An <italic>in situ</italic> cross-linked 1D/3D perovskite heterostructure achieved a solar cell with 21.19% PCE and operational stability over 3000 hours.
The mixtures of cations and anions used in hybrid halide perovskites for high-performance solar cells often undergo element phase segregation, which limits device lifetime. We adapted Schelling's model segregation to study individual cation migration found that the initial film inhomogeneity accelerates materials degradation. fabricated perovskite films (FA1-xCsxPbI3; where FA is formamidinium) through addition selenophene, led homogeneous distribution retarded aggregation during processing...
Abstract Enhancing device lifetime is one of the essential challenges in perovskite solar cells. The ultrathin Eu‐MOF layer introduced at interface between electron‐transport and absorber to improve stability. Both Eu ions organic ligands MOF can reduce defect concentration carrier transport. Moreover, due Förster resonance energy transfer effect, films light utilization decomposition under ultraviolet light. Meanwhile, also turns tensile strain compressive films. As a result, corresponding...
Abstract Quasi‐2D (Q‐2D) perovskites are promising materials applied in light‐emitting diodes (LEDs) due to their high exciton binding energy and quantum confinement effects. However, Q‐2D feature a multiphase structure with abundant grain boundaries interfaces, leading nonradiative loss during the energy‐transfer process. Here, more efficient transfer is achieved by manipulating crystallization kinetics of different‐ n phases. A series alkali‐metal bromides utilized manipulate nucleation...
In inverted perovskite solar cells (PSCs), the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) is a widely used electron transport material. However, high degree of energy disorder and inadequate passivation PCBM limit efficiency devices, severe self-aggregation unstable morphology lifespan devices. Here, we design series dyads FP-Cn (n = 4, 8, 12) to replace as an layer, where [60]fullerene linked with terpyridine chelating group via flexible alkyl chain different...
While quasi-two-dimensional (quasi-2D) perovskites have emerged as promising semiconductors for light-emitting diodes (LEDs), the broad-width distribution of quantum wells hinders their efficient energy transfer and electroluminescence performance in blue emission. In particular, underlying mechanism is closely related to crystallization kinetics has yet be understood. Here first time, influence bifunctional zwitterions with different coordination affinity on quasi-2D systematically...
Perovskite/silicon tandem solar cells are promising to penetrate photovoltaic market. However, the wide-bandgap perovskite absorbers used in top-cell often suffer severe phase segregation under illumination, which restricts operation lifetime of cells. Here, a strain modulation strategy fabricate light-stable perovskite/silicon is reported. By employing adenosine triphosphate, residual tensile absorber successfully converted compressive strain, mitigates light-induced ion migration and...
Abstract Formamidinium (FA)‐based lead triiodide have emerged as promising light‐harvesting materials for solar cells due to their intriguing optoelectronic properties. However, obstacles commercialization remain regarding the primary intrinsic instability, wherein volatile organic components of FA + cations are prone escape under operational stressors. Herein, stabilizing FA‐based perovskite through toughening interface with symmetric molecule 1,1′‐(Methylenedi‐4,1‐phenylene) bismaleimide...