A5014957211- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Analytical Chemistry and Sensors
- Gas Sensing Nanomaterials and Sensors
- Quantum Dots Synthesis And Properties
- Solid-state spectroscopy and crystallography
- Advanced Chemical Sensor Technologies
- ZnO doping and properties
- Conducting polymers and applications
- Copper-based nanomaterials and applications
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- 2D Materials and Applications
- Cancer-related molecular mechanisms research
- Electronic and Structural Properties of Oxides
- Circular RNAs in diseases
- Thermal Expansion and Ionic Conductivity
- Natural product bioactivities and synthesis
- MicroRNA in disease regulation
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced Thermoelectric Materials and Devices
- Advanced Photocatalysis Techniques
- Analytical Chemistry and Chromatography
- Phytochemical Studies and Bioactivities
Beijing Institute of Technology
2010-2025
South China Normal University
2023-2025
Tianjin Medical University
2022-2025
Tianjin University
2022-2025
Academy of Opto-Electronics
2025
Shenzhen Bao'an District People's Hospital
2024
Wuhan University
2013-2023
North China University of Science and Technology
2015-2023
Anhui Polytechnic University
2023
Henan University
2023
Computational, thin-film deposition, and characterization approaches have been used to examine the ternary halide semiconductor Cs3Sb2I9. Cs3Sb2I9 has two known structural modifications, 0-D dimer form (space group P63/mmc, no. 194) 2-D layered (P3̅m1, 164), which can be prepared via solution solid-state or gas-phase reactions, respectively. Our computational investigations suggest that form, is a one-third Sb-deficient derivative of ubiquitous perovskite structure, potential candidate for...
Efficient lead (Pb)-free inverted planar formamidinium tin triiodide (FASnI3 ) perovskite solar cells (PVSCs) are demonstrated. Our FASnI3 PVSCs achieved average power conversion efficiencies (PCEs) of 5.41% ± 0.46% and a maximum PCE 6.22% under forward voltage scan. The exhibit small photocurrent-voltage hysteresis high reproducibility. champion cell shows steady-state efficiency ≈6.00% for over 100 s.
The concept of electronic dimensionality,<italic>i.e.</italic>, the connectivity atomic orbitals that comprise lower conduction band and upper valence band, is introduced to better account for device performance perovskite-based solar cells.
Using density-functional theory calculations, we analyze the optical absorption properties of lead (Pb)-free metal halide perovskites (AB$^{2+}$X$_3$) and double (AB$^+$B$^{3+}$X$_6$) (A = Cs or monovalent organic ion, B$^{2+}$ non-Pb divalent metal, B$^+$ B$^{3+}$ trivalent X halogen). We show that, if is not Sn Ge, Pb-free exhibit poor absorptions because their indirect bandgap nature. Among nine possible types perovskites, six have direct bandgaps. Of these types, four inversion...
Lead thiocyanate in the perovskite precursor can increase grain size of a thin film and reduce conductivity boundaries, leading to solar cells with reduced hysteresis enhanced fill factor. A planar cell boundary interface passivation achieves steady-state efficiency 18.42%.
Abstract The double perovskite family, A 2 M I III X 6 , is a promising route to overcome the lead toxicity issue confronting current photovoltaic (PV) standout, CH 3 NH PbI . Given generally large indirect band gap within most known perovskites, band‐gap engineering provides an important approach for targeting outstanding PV performance this family. Using Cs AgBiBr as host, through alloying of In /Sb has been demonstrated in work. Ag(Bi 1− x )Br (M=In, Sb) accommodates up 75 % with...
Lead-free double-perovskite nanocrystals (NCs), that is, Cs2AgIn xBi1- xCl6 ( x = 0, 0.25, 0.5, 0.75, and 0.9), can be tuned from indirect band gap 0.5) to direct 0.75 0.9) are designed. Direct NCs exhibit 3 times greater absorption cross section, lower sub-band trap states, >5 photoluminescence quantum efficiency (PLQE) compared those observed for (Cs2AgBiCl6). A PLQE of 36.6% is comparable lead perovskite in the violet region. Besides edge emission, bright orange (570 nm) emission. Density...
In this work, we describe details of a two-step deposition approach that enables the preparation continuous and well-structured thin films Cs2SnI6, which is one-half Sn-deficient 0-D perovskite derivative (i.e., compound can also be written as CsSn0.5I3, with structure consisting isolated SnI64– octahedra). The were characterized using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), UV–vis spectroscopy, photoluminescence (PL),...
Bismuth- or antimony-based lead-free double perovskites represented by Cs2 AgBiBr6 have recently been considered promising alternatives to the emerging lead-based for solar cell applications. These new belong Fm3‾ m space group and consist of two types octahedra alternating in a rock-salt face-centered cubic structure. We show, density functional theory calculations, that stable chemical potential region pure is narrow. Ag vacancies are shallow accepters can easily form, leading intrinsic...
Recently, there has been substantial interest in developing double-B-cation halide perovskites, which hold the potential to overcome toxicity and instability issues inherent within emerging lead halide-based solar absorber materials. Among all double perovskites investigated, In(I)-based Cs2InBiCl6 Cs2InSbCl6 have proposed as promising thin-film photovoltaic candidates, with computational examination predicting suitable materials properties, including direct bandgap small effective masses...
The schematic diagram of different Sn-5s and I-5p antibonding strengths FASnI<sub>3</sub> MASnI<sub>3</sub> due to various bond lengths Sn–I.
Broadband emission is attributed to the formation of self-trapped excitons (STEs) due strong electron-phonon coupling. Interestingly, it has been observed in only certain three-dimensional and low-dimensional metal halide perovskites. Here, we show by density functional theory calculation that a low electronic dimensionality prerequisite for STE and, therefore, broadband emission. We further multiple structures exist each perovskite exhibiting However, with Jahn-Teller-like octahedral...
Through density functional theory calculations, we show that the alloy perovskite system BaZr1–xTixS3 (x < 0.25) is a promising candidate for producing high power conversion efficiency (PCE) solar cells with ultrathin absorber layers. To maximize minority carrier lifetime, which important achieving PCE, defect calculations films should be synthesized under moderate (i.e., near stoichiometric) growth conditions to minimize formation of deep-level defects. The BaZrS3 also found exhibit...
We show that the cooperation of lead thiocyanate additive and a solvent annealing process can effectively increase grain size mixed-cation mixed-halide perovskite thin films while avoiding excess iodide formation. As result, average wide-bandgap increases from 66 ± 24 to 1036 111 nm, mean carrier lifetime shows more than 3-fold increase, 330 ns over 1000 ns. Consequently, open-circuit voltage solar cells by 80 (70) mV, power conversion efficiency (PCE) 13.44 0.48 (11.75 0.34) 17.68 0.36...
Novel layered Na<sub>1−x</sub>Ni<sub>y</sub>Fe<sub>1−y</sub>O<sub>2</sub>OER catalysts outperform IrO<sub>2</sub>, RuO<sub>2</sub>, and NiFe-LDH, reaching an 11.22% solar/H<sub>2</sub>efficiency for a perovskite solar cell.
Abstract Mixed tin-lead perovskite solar cells have driven a lot of passion for research because their vital role in all-perovskite tandem cells, which hold the potential achieving higher efficiencies compared to single-junction counterparts. However, pronounced disparity crystallization processes between tin-based perovskites and lead-based perovskites, coupled with easy Sn 2+ oxidation, has long been dominant factor contributing high defect densities. In this study, we propose...
Wide-bandgap (WBG) perovskite solar cells have attracted considerable interest for their potential applications in tandem cells. However, the predominant obstacles impeding widespread adoption are substantial open-circuit voltage (V
Practical application of electrochemical water splitting demands durable, efficient, and non-noble metal catalysts for both hydrogen evolution reaction (HER) oxygen (OER). Herein, we report a new nanowire electrocatalyst, consisting S-doped CoWP nanoparticles embedded in S- N-doped carbon matrix (S-CoWP@(S,N)-C), which is situ transformed from Hofmann-type (Co, W)-based metal–organic framework (MOF) nanowires. Because S N doping to the nanoparticles, obtained S-CoWP@(S,N)-C catalyst reaches...
We explore the photovoltaic-relevant properties of 2D MA2Pb(SCN)2I2 (where MA = CH3NH3+) perovskite using a combination materials synthesis, characterization and density functional theory calculation, determine electronic that are significantly different from those previously reported in literature. The layered with mixed-anions exhibits an indirect bandgap ∼2.04 eV, slightly larger direct ∼2.11 eV. carriers (both electrons holes) also found to be confined within layers. Our results suggest...
A hybrid thermal evaporation method was explored in the synthesis of lead-free perovskite thin films and fabrication solar cells.
Abstract Recently, Cu I ‐ and Ag ‐based halide double perovskites have been proposed as promising candidates for overcoming the toxicity instability issues inherent within emerging Pb‐based perovskite absorbers. However, up to date, only experimentally synthesized; there are no reports on successful synthesis of analogues. Here we show that, owing much higher energy level 3d 10 orbitals than 4d orbitals, atoms energetically favor 4‐fold coordination, forming [CuX 4 ] tetrahedra (X=halogen),...
We propose trigonal Cu<sub>2</sub>-II-Sn-VI<sub>4</sub> (II = Ba, Sr and VI S, Se) quaternary compounds for earth-abundant solar cell applications.
Left ventricular remodeling after acute myocardial infarction (AMI) is associated with adverse prognosis. It becoming increasingly clear that circulating miRNAs could be promising biomarkers for various pathological processes in the heart, including infarction, and progression to heart failure. In present study, a total of 359 consecutive patients were recruited. Plasma samples collected on admission. Echocardiographic studies performed during admission at six months follow-up AMI....