A5089676475- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Organic Light-Emitting Diodes Research
- Advancements in Battery Materials
- Organic Electronics and Photovoltaics
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- 2D Materials and Applications
- Thermal Expansion and Ionic Conductivity
- COVID-19 Pandemic Impacts
- Color perception and design
- Dyeing and Modifying Textile Fibers
- Nanowire Synthesis and Applications
- Luminescence Properties of Advanced Materials
- Optical properties and cooling technologies in crystalline materials
- Additive Manufacturing and 3D Printing Technologies
National Taiwan Normal University
2024-2025
Research Center for Applied Science, Academia Sinica
2017-2023
Indian Institute of Technology Roorkee
2021-2023
Arizona State University
2023
Jagiellonian University
2023
McGill University
2023
Tunghai University
2023
National Taiwan University
2017-2020
Academia Sinica
2017-2020
National Taiwan University of Science and Technology
2020
Lead-free antimony based metal halide perovskites were used as photoactive materials in solar cell devices and exhibited maximum power conversion efficiency of 2.04%.
The presence of toxic lead (Pb) remains a major obstruction to the commercial application perovskite solar cells. Although antimony (Sb)-based perovskite-like structures A3M2X9 can display potentially useful photovoltaic behavior, solution-processed Sb-based usually favor dimer phase, which has poor properties. In this study, we prepared layered polymorph Cs3Sb2I9 through solution-processing and studied its exciton binding energy lifetime layer-form were approximately 100 meV 6 ns,...
Hybrid lead halide perovskites continue to attract interest for use in optoelectronic devices such as solar cells and light-emitting diodes. Although challenging, the replacement of toxic these systems is an active field research. Recently, trivalent metal cations (Bi3+ Sb3+) that form defect A3B2X9 has received great attention development cells, but their light-emissive properties have not previously been studied. Herein, all-inorganic antimony-based two-dimensional perovskite, Cs3Sb2I9,...
We fabricated the defect passivation of perovskite solar cells using CdSe/ZnS quantum dots. The efficient reduces trap charge density and elongates carrier life time.
The recent advances in lead-free perovskites (LFP) for solar cell applications have been discussed and their properties are compared with lead-based perovskites. In addition, reasons low efficiency of LFP comprehensively discussed.
Metal halide perovskites having three-dimensional crystal structures are being applied successfully in various optoelectronic applications. To address their most challenging issues-instability and toxicity-without losing efficiency, lower-dimensional appear to be promising alternatives. Recently, two-dimensional (2D) perovskite solar cells have been developed exhibiting excellent photostability moisture-stability, together with moderate device efficiency. This review summarizes the...
Abstract Here, lattice expansion modulated reversible thermochromism (TCM) in all‐inorganic lead‐free Cs 3 Sb 2 I 9 perovskite single crystals (SCs) is demonstrated. Upon temperature change, SC exhibits a color change between red and dark‐brown. The corresponding optical band‐edge modulation structural phase transition are monitored by dependent UV–vis absorption spectroscopy X‐ray diffraction study. This observed TCM attributed to the strain relaxation at elevated temperatures....
Fully inorganic perovskites based on Bi3+ and Sb3+ are emerging as alternatives that overcome the toxicity low stability of their Pb-based perovskite counterparts. Nevertheless, thin film fabrication Pb-free remains a struggle, with poor morphologies incomplete conversions greatly inhibiting device performance. In this study, we modulated crystallization an all-inorganic dimer phase Sb (d-Cs3Sb2I9) through gradual increase in annealing temperature, accompanied by use Lewis bases for adduct...
Lead-free antimony-based perovskites have emerged as promising photovoltaic materials due to their outstanding stability, lower toxicity, and easy processability. Recently, researchers showed successful implication in indoor energy applications, thus prompting possible applications buliding integrated device applications. Here, we investigate temperature-dependent band gap engineering leading reversible thermochromism (TCM) all-inorganic Cs3Sb2Br9 single crystals (SCs). The 2D exhibited a...
Abstract Organic photovoltaics have received active research interest during the past 30 years due to their low cost, flexibility, easy scalability, and robustness. Recently, several efforts been made enhance power conversion efficiency (PCE) stability by considering advanced photon harvesting technology, utilization of novel donor–acceptor materials, optimizing device design strategy. Specifically, multiplication process like singlet fission (SF) including low‐bandgap conjugated polymers...
In this paper, we demonstrate a unique multifunctional separator prepared by sputtering thin layer of graphite on top commercial polypropylene–polyethylene separator. This modified separator, when used in Li–Li symmetrical cell, suppresses Li dendrite growth maintaining uniform ionic flux the metal. When employed lithium–sulfur battery (LSB), can retard shuttling lithium polysulfides (LiPSs) through physical interaction, as demonstrated live discharge an H-cell. Moreover, conductivity...
Herein, we synthesized Sb-based single crystals (SCs) of Cs2AgSbCl6 with an impressive low bandgap ∼1.82 eV and demonstrated the effect strain on optical properties. Interestingly, polycrystalline ground powder heated SCs exhibited a larger ∼2.55 eV. The reduction is attributed to existence in SC as confirmed by X-ray diffraction Raman spectroscopy supported density functional theory (DFT) calculations. engineering for can play pivotal role developing low-bandgap lead-free double perovskite...
Two-dimensional (2D) (OLM) 2 Cs n −1 Pb Br 3 +1 perovskite nanoplates with = and exhibit bright tunable violet-to-blue photoluminescence, offering composition-dependent optical properties.
The development of multidimensional heterostructure (2D/3D) lead halide perovskites has emerged as an effective approach to enhancing the efficiency and long-term stability perovskite solar cells (PSCs). However, a fundamental understanding working mechanisms, such carrier extraction, transfer dynamics in heterostructures remains elusive. Here, we observe ultrafast extraction highly efficient 2D/3D bilayer PSCs (power conversion 21.12%) via femtosecond time-resolved pump–probe transient...
In this study, a solution-processable lead iodide semiconductor having wide band gap was investigated as light absorbing material for various organic electron transport materials, in search low-cost materials allowing the facile fabrication of efficient photovoltaic devices. A Tauc plot suggested intrinsic optical 2.4 eV thin film PbI2, while X-ray diffraction revealed that spin-coated PbI2 had hexagonal crystalline structure with preferable orientation along (001) plane. The effect...
The outstanding properties of perovskites have attracted huge attention in optoelectronic applications. However, the current study mainly focuses on small-area single-layer perovskite films. Surface modification polydimethylsiloxane (PDMS) surface has potential for successful transfer thin films and also forming perovskite/perovskite heterostructures. Nevertheless, PDMS processes suffer from fast hydrophobicity gain, thus greatly inhibiting their use printing In this study, grafting-assisted...
The outstanding properties of lead-based perovskite nanomaterials have led researchers to investigate the potential their two-dimensional (2D) counterparts with chemical formula A2′An+1BnX3n+1. Despite advantages such as better stability and higher exciton binding energy, synthesis phase pure 2D remains challenging due fast nucleation process. Here, we demonstrate a simple efficient method synthesize specific n-values. room-temperature growth perovskites n-values are controlled in two-step...
Abstract The all‐inorganic CsPbX 3 (X—Cl, Br, I) perovskite has the potential to solve practical issues of environmental instability due presence hygroscopic organic cations in hybrid organic–inorganic perovskites. promising exists different crystallographic phases depending upon composition and processing conditions which potentially impact film morphology, device efficiency, stability. Stabilizing black metastable phase at room temperature substantially solved problem high crystallization...
Abstract The notorious growth of lithium (Li) dendrites and the instability solid electrolyte interface (SEI) during cycling make Li metal anodes unsuitable for use in commercial Li‐ion batteries. Herein, simple sugar coating (α‐ d ‐glucose) is demonstrated on top to halt stabilize SEI. α‐ ‐glucose layer possesses high surface adhesive energies toward Li, which promote homogenous stripping plating ions metal. Density functional theory reveals that diffusion within governed by hopping around...
New perovskite materials of two-dimensional (2D) all-inorganic Ruddlesden-Popper (RP) Cs
Herein, core-twisted tetrachloroperylenediimides (ClPDIs) were introduced as new efficient electron-transporting materials (ETMs) to replace the commonly used fullerene acceptor PC61 BM in inverted planar perovskite solar cells (PSCs). ClPDI showed a low-lying lowest unoccupied molecular orbital (LUMO) energy level of -3.95 eV, which was compatible with conduction band CH3 NH3 PbI3-x Clx (-3.90 eV). In addition, role length alkyl side chain at imide position modulating solubility,...