A5054299157- Chalcogenide Semiconductor Thin Films
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Crystallization and Solubility Studies
- Copper-based nanomaterials and applications
- 2D Materials and Applications
- MXene and MAX Phase Materials
- X-ray Diffraction in Crystallography
- Photovoltaic Systems and Sustainability
- Inorganic Chemistry and Materials
- Iron-based superconductors research
- Organoselenium and organotellurium chemistry
- Solid-state spectroscopy and crystallography
- Photovoltaic System Optimization Techniques
- Customer Service Quality and Loyalty
- Energy and Environment Impacts
- Crystal Structures and Properties
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Organometallic Compounds Synthesis and Characterization
Purdue University West Lafayette
2020-2024
Kansas State University
2019
Chalcogenide perovskites have garnered interest for applications in semiconductor devices due to their excellent predicted optoelectronic properties and stability. However, high synthesis temperatures historically made these materials incompatible with the creation of photovoltaic devices. Here, we demonstrate solution processed luminescent BaZrS3 BaHfS3 chalcogenide perovskite films using single-phase molecular precursors at sulfurization 575 °C times as short one hour. These precursor inks...
Chalcogenide perovskites, including BaZrS3, have been suggested as highly stable alternatives to halide perovskites. However, the synthesis of chalcogenide perovskites has proven be a significant challenge, often relying on excessively high temperatures and methods that are incompatible with device integration. In this study, we developed solution-based approach deposition BaZrS3. This method utilizes combination soluble barium thiolate nanoparticulate zirconium hydride. Following precursors...
Chalcogenide perovskites are promising semiconductor materials with attractive optoelectronic properties and appreciable stability, making them enticing candidates for photovoltaics related electronic applications. Traditional synthesis methods these have long suffered from high‐temperature requirements of 800–1000 °C. However, the recently developed solution processing route provides a way to circumvent this. By utilizing barium thiolate ZrH 2 , this method is capable synthesizing BaZrS 3...
This article encapsulates the science and engineering that goes into solution processed solar cells, focusing on a variety of established emerging metal chalcogenide materials.
Abstract Chalcogenide perovskites have garnered increasing attention as stable, non‐toxic alternatives to lead halide perovskites. However, their conventional synthesis at high temperatures (>1000 °C) has hindered widespread adoption. Recent studies developed low‐to‐moderate temperature methods (<600 using reactive precursors, yet a comprehensive understanding of the pivotal factors affecting reproducibility and repeatability remains elusive. This study delineates critical in...
Growing concerns regarding the safety, flammability and hazards posed by Li-ion systems have led to research on alternative rechargeable metal-ion electrochemical storage technologies. Among most notable of these are Na-ion supercapacitors batteries, motivated, in part, similar electrochemistry Li Na ions. However, sodium ion batteries (SIBs) come with their own set issues, especially large size + ion, its relatively sluggish kinetics low energy densities. This makes development novel...
The solution processing of Cu(In,Ga)(S,Se)2 photovoltaics from colloidal nanoparticles has long suffered deleterious carbonaceous residues originating chain native ligands. This impurity carbon been observed to hinder grain formation during selenization and leave a discrete residue layer between the absorber back contact. In this work, organic inorganic ligand exchanges were investigated remove tightly bound oleylamine ligands Cu(In,Ga)S2 nanoparticles, thereby removing source contamination....
We report the conversion of BaZrO 3 into BaZrS at temperatures below 600 °C, enabled by a thermodynamics-guided redesigned sulfurization process.
Ag 3 SX (X = I, Br) possess a unique anti-perovskite structure (similar to perovskites but switching anions by cations and vice-versa ). Here, we propose new low-cost low-temperature synthesis methodology based on thiol-amine molecular ink deposition.
This work highlights the challenges of weak photoluminescence, limited choice substrates, unwanted impurity phases, and Ruddlesden–Popper phases in moderate-temperature synthesized chalcogenide perovskites.
Tolerance factor analysis has been widely used to predict suitable compositions for oxide and halide perovskites. However, in the case of emerging chalcogenide perovskites, predictions from tolerance have failed align with experimental observations. In this work, we reconsider how is being applied, specifically adjusting effect increased covalency bonding on ionic radii. Further, propose a series screening steps based octahedral factor, electronegativity difference better formation sulfide
Controlling the crystallization of perovskites is imperative to reduce defect densities in perovskite thin films and extend device lifetimes. In this work, combinations amine chalcogenide ligands were introduced sequential deposition method fabricate highly crystalline oriented formamidinium lead iodide with reduced increased charge carrier The dual additives can tune intermediate state control crystallization, leading devices improved efficiencies stabilities. While thiophenol failed...
Abstract Chalcogenide perovskites have garnered interest for applications in semiconductor devices due to their excellent predicted optoelectronic properties and stability. However, high synthesis temperatures historically made these materials incompatible with the creation of photovoltaic devices. Here, we demonstrate solution processed luminescent BaZrS 3 BaHfS chalcogenide perovskite films using single‐phase molecular precursors at sulfurization 575 °C times as short one hour. These...
Solutions containing n -alkylammonium polyselenides constitute a new reactive solvent system. This dissolution chemistry is broadly generalizable and can enable solution processed synthesis of wide range metal chalcogenide semiconductors, both as thin films nanoparticles.
Colloidal nanoparticles have demonstrated significant promise in the fabrication of solution-processed Cu(In,Ga)(S,Se)2 photovoltaics. However, carbonaceous impurities from long-chain native ligands retained films during and after heat treatments necessitated exploration postsynthetic ligand-exchange procedures, which increases process complexity solvent usage could potentially reduce cost advantages that solution processing aims to deliver over conventional vacuum processing. In this...
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Syntheses of homoleptic zirconium and hafnium dithiocarbamates via carbon disulfide insertion into amides were investigated for their utility as soluble molecular precursors chalcogenide perovskites binary metal sulfides. Treating M(NEtR)4 (M = Zr, Hf R Me, Et) with CS2 resulted in quantitative yields Group IV dithiocarbamates. Zr(κ2-S2CNMeEt) (1), Zr(κ2-S2CNEt2)4 (2), Hf(κ2-S2CNEt2)4 (4), a rare example crystal CS2-inserted amide species, characterized. Computational analysis confirmed the...
Solution-processed CuInSe2 films have generally relied on sulfide or sulfoselenide precursor that, during the grain growth process, hamper of thicker and lead to formation a fine-grain layer. However, recent research has indicated that sulfur reduction in film modifies mechanism may enable fabrication absorbers are free any In this work, we pursue direct solution deposition sulfur-free from molecular approach. To end, tune amine-thiol reactive solvent system study changes resulting soluble...
Solution processing of CIGSSe photovoltaics using colloidal nanoparticles has emerged as a promising, low toxicity fabrication method. However, carbonaceous impurities from nanoparticle surface ligands have continually hindered grain growth and resulting device efficiencies. In this work an exhaustive ligand exchange was employed to strip subsequently stabilize them with inorganic sulfide ligands, yielding non-toxic, high mass concentration inks, which were blade coated in ultra-smooth,...