A5071177661- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Process Optimization and Integration
- Advanced Control Systems Optimization
- Copper-based nanomaterials and applications
- Advanced Database Systems and Queries
- Perovskite Materials and Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Hybrid Renewable Energy Systems
- Job Satisfaction and Organizational Behavior
- Data Management and Algorithms
- Thermochemical Biomass Conversion Processes
- Membrane Separation and Gas Transport
- Photovoltaic Systems and Sustainability
- Semantic Web and Ontologies
- Extraction and Separation Processes
- Phase Equilibria and Thermodynamics
- Ethics in Business and Education
- Knowledge Management and Sharing
- Carbon Dioxide Capture Technologies
- Energy and Environment Impacts
- Lignin and Wood Chemistry
- Data Quality and Management
- Semiconductor materials and interfaces
- Workplace Spirituality and Leadership
Purdue University West Lafayette
2016-2025
Shell (India)
2024
Indian Institute of Management Kashipur
2017-2023
University of Illinois Chicago
2020-2023
The University of Melbourne
2020-2023
University of Birmingham
2020-2023
TD Bank
2020-2023
Barclays (United Kingdom)
2020-2023
National University of Singapore
2016-2023
Kagawa University
2020-2023
Earth abundant copper-zinc-tin-chalcogenide (CZTSSe) is an important class of material for the development low cost and sustainable thin film solar cells. The fabrication CZTSSe cells by selenization CZTS nanocrystals presented. By tuning composition developing a robust coating method, total area efficiency as high 7.2% under AM 1.5 illumination light soaking has been achieved.
Cu2ZnSnS4 (CZTS) and Cu2ZnSnSe4 (CZTSe) based solar cells are promising candidates for low cost due to the natural abundance toxicity of constituent elements. Here, we present first reported synthesis colloidal CZTS nanocrystals using a simple solution-phase method. Solar fabricated selenized nanocrystal inks had power conversion efficiency 0.74% under AM1.5G illumination.
The creation of a suitable inorganic colloidal nanocrystal ink for use in scalable coating process is key step the development low-cost solar cells. Here, we present facile solution synthesis chalcopyrite CuInSe 2 nanocrystals and demonstrate that inks based on these can be used to create simple cells, with our first cells exhibiting an efficiency 3.2% under AM1.5 illumination. We also report uniform hexagonal shaped single crystals nanorings by altering parameter.
One step conversion of lignin from intact biomass to two phenol products, improving access aromatics and fuels.
Recent developments in the colloidal synthesis of high quality nanocrystals have opened up new routes for fabrication low-cost efficient photovoltaic devices. Previously, we demonstrated utility CuInSe2 thin film solar cells. In those devices, sintering nanocrystal yields a relatively dense with some void space inclusions. Here, present general approach toward eliminating sintered films by utilizing reactions that yield controlled volume expansion film. This is first synthesizing ink...
Cu2Zn(Sn1−xGex)S4 nanocrystals have been synthesized via batch reaction in oleylamine with no additional surfactants present. The are knife-coated on molybdenum substrates and then selenized to form a dense layer of Cu2Zn(Sn1−xGex)(S,Se)4, which is used as the photoabsorbing thin film solar cell. band gaps resulting cells demonstrated be controlled by adjusting Ge/(Ge+Sn) ratio nanocrystal synthesis precursors. Solar fabricated from Cu2ZnGeS4 films yielded power conversion efficiency 0.51%....
ABSTRACT Solution phase deposition methods offer great potential for low‐cost photovoltaic device fabrication. We have previously developed a method copper indium gallium disulfoselenide (CIGSSe) fabrication based on drop‐casting disulfide (CIGS) nanocrystals in toluene or hexane‐based ink followed by chalcogen exchange elemental selenium vapor at 500 °C. By starting with the chalcopyrite sphaelerite of CIGS controlled stoichiometry, superior composition uniformity can be achieved...
Abstract Thin‐film solar cells using Cu 2 ZnSn(S,Se) 4 absorber materials continue to attract increasing attention. The synthesis of kesterite ZnSnS nanoparticles by a modified method hot injection is explained. Characterization the energy dispersive X‐ray spectroscopy, diffraction, Raman, and transmission electron microscopy presented discussed. When suspended in an ink, coated, processed into device, obtained this achieve total area (active area) efficiency 9.0% (9.8%) AM 1.5 illumination...
Abstract Nanocrystal‐based Cu 2 Zn(Sn y Ge 1‐y )(S x Se 4‐x ) (CZTGeSSe) thin‐film solar cell absorbers with tunable band gap have been prepared. Maximum solar‐conversion total area efficiencies of up to 9.4% are achieved a content 30 at.%. Improved performance compared similarly processed films ZnSn(S (CZTSSe, 8.4% efficiency) is through controlling loss from the bulk absorber film during high‐temperature selenization treatment, although some surface still observed following this step....
Purpose An original systematic review of the academic literature on applications artificial intelligence (AI) in human resource management (HRM) domain is carried out to capture current state-of-the-art and prepare an research agenda for future studies. Design/methodology/approach Fifty-nine journal articles are selected based a holistic search quality evaluation criteria. By using content analysis structural concept analysis, this study elucidates extent impact AI application HRM functions,...
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...
Recent advances in information retrieval over hyperlinked corpora have convincingly demonstrated that links carry less noisy than text. We investigate the feasibility of applying link-based methods new applications domains. The specific application we consider is to partition authors into opposite camps within a given topic context newsgroups. A typical newsgroup posting consists one or more quoted lines from another followed by opinion author. This social behavior gives rise network which...
The advent of the World Wide Web has created an explosion in available on-line information. As range potential choices expand, time and effort required to sort through them also expands. We propose a formal framework for expressing combining user preferences address this problem. Preferences can be used focus search queries order results. A preference is expressed by entity which described set named fields; each field take on values from certain type. * symbol may match any element that...
A hybrid hydrogen-carbon (H 2 CAR) process for the production of liquid hydrocarbon fuels is proposed wherein biomass carbon source and hydrogen supplied from carbon-free energy. To implement this concept, a has been designed to co-feed gasifier with H CO recycled -CO conversion reactor. Modeling liquids identified several major advantages CAR process. ( i ) The land area needed grow <40% that by other routes solely use support entire transportation sector. ii Whereas literature estimates...
We compare the dark current-voltage (IV) characteristics of three different thin-film solar cell types: hydrogenated amorphous silicon (a-Si:H) p-i-n cells, organic bulk heterojunction (BHJ) and Cu(In,Ga)Se2 (CIGS) cells. All device types exhibit a significant shunt leakage current at low forward bias (V&lt;∼0.4) reverse bias, which cannot be explained by classical diode model. This parasitic exhibits non-Ohmic behavior, as opposed to traditional constant resistance model for...
Thermally linked distillation column configurations to separate near-ideal multicomponent mixtures containing four or more components are discussed. It is shown that for sharp separation of an n-component mixture using only one reboiler and condenser the minimum number rectifying stripping sections needed 4n − 6. A stepwise procedure proposed obtain such configurations, a series observations presented which make task generating these little easier. found that, n ≥ 4, some missing from known...