A5005903155- Perovskite Materials and Applications
- Photovoltaic System Optimization Techniques
- Chalcogenide Semiconductor Thin Films
- solar cell performance optimization
- Quantum Dots Synthesis And Properties
- Solar Radiation and Photovoltaics
- Machine Learning in Materials Science
- GaN-based semiconductor devices and materials
- Spacecraft Design and Technology
- Silicon and Solar Cell Technologies
- Solar Thermal and Photovoltaic Systems
- Integrated Circuits and Semiconductor Failure Analysis
- CCD and CMOS Imaging Sensors
- Quantum, superfluid, helium dynamics
- ZnO doping and properties
- Semiconductor materials and interfaces
- TiO2 Photocatalysis and Solar Cells
- Thin-Film Transistor Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Electronic and Structural Properties of Oxides
- Copper-based nanomaterials and applications
- Energy and Environment Impacts
- Advanced battery technologies research
- Gas Sensing Nanomaterials and Sensors
- Magnetic and transport properties of perovskites and related materials
Case Western Reserve University
2004-2024
National Renewable Energy Laboratory
2009-2024
Glenn Research Center
2018-2024
National Aeronautics and Space Administration
2018-2024
University of Colorado Boulder
2022
SLAC National Accelerator Laboratory
2022
Arizona State University
2009-2016
Quality Electrodynamics (United States)
2012
An automated data analysis pipeline is developed to preprocess electroluminescence (EL) module images, and parse the images into individual cells be used as an input for machine learning algorithms. The dataset in study includes EL of three 60 cell modules from each five commercial brands at six steps damp heat exposure, 500 3000 h. Preprocessing original raw lens distortion correction, filtering, thresholding, convex hull, regression fitting, perspective transformation produce planar...
Abstract Metal halide perovskites (MHPs) have emerged as a prominent new photovoltaic material combining very competitive power conversion efficiency that rivals crystalline silicon with the added benefits of tunable properties for multijunction devices fabricated from solution which can yield high specific power. Perovskites also demonstrated some lowest temperature coefficients and highest defect tolerance, make them excellent candidates aerospace applications. However, MHPs must...
Based on recent advances in nanoscience, data science and the availability of massive real-world datastreams, mesoscopic evolution energy materials can now be more fully studied. The temporal is vastly complex time length scales fundamentally challenging to scientific understanding degradation mechanisms pathways responsible for over lifetime. We propose a paradigm shift towards modeling, based physical statistical models, that would integrate laboratory studies datastreams into...
ADVERTISEMENT RETURN TO ISSUEPREVEnergy FocusNEXTWhat Would It Take to Manufacture Perovskite Solar Cells in Space?Lyndsey McMillon-Brown*Lyndsey McMillon-BrownPhotovoltaic and Electrochemical Systems Branch, John H. Glenn Research Center, The National Aeronautics Space Administration, Cleveland, Ohio 44135, United States*[email protected]More by Lyndsey McMillon-Brownhttps://orcid.org/0000-0002-4650-5499, Joseph M. LutherJoseph LutherNational Renewable Energy Laboratory, Golden, Colorado...
A nonrelational, distributed computing, data warehouse, and analytics environment (Energy-CRADLE) was developed for the analysis of field laboratory from multiple heterogeneous photovoltaic (PV) test sites. This informatics infrastructure designed to process diverse formats PV performance climatic telemetry time-series collected a outdoor network, i.e., Solar Durability Lifetime Extension global SunFarm as well point-in-time spectral image measurements material samples. Using Hadoop/HBase...
Perovskite solar cells (PSCs) could provide new low-cost opportunities for powering spacecraft. We are designing a PSC resilient to lunar surface conditions, focusing on contact/barrier layers combinations that maximize stability. Thermal vacuum stress shows with gold back-contacts and SiOx protection retain >90% of initial efficiency indium tin oxide (ITO)-contacted ∼100% after five months stress. mitigates mechanical aspects contact stress, retaining 99% efficiency, whereas silicone/cover...
Polarized Raman spectra were measured for single crystals and polycrystalline ${\text{ZnGeN}}_{2}$ grown by a vapor-liquid-solid method. A group-theoretical analysis of the selection rules governing predicted dependence on incoming outgoing wave polarizations propagation direction is presented. First-order corresponding to zone center phonons are calculated from first principles using density functional perturbation theory. The Brillouin integrated phonon states also calculated. Comparison...
The authors demonstrate the feasibility of quantifying cell-level performance heterogeneity from module-level I–V curves by determining conditions bypass diode turn-on. Analysis these falls outside typical diode-based models photovoltaic (PV) performance. show that this approach can leverage statistical and machine learning techniques for broad application to massive datasets, combine those insights with simulations laboratory-based experiments provide useful information into metastability...
A data set of 90 60-cell module images from 5 commercial PV brands over 6 exposure steps damp-heat testing were analyzed. An automated analysis pipeline was developed using the open source coding language Python to parse into individual cell images. As original raw are not directly suitable for modeling, this algorithm implements techniques which include filtering, thresholding, convex Hull, regression fitting, and perspective transformation pre-process image. After extraction, 5400 as a...
Using quasiparticle self-consistent GW (QSGW) theory, we analyze materials properties of the II-IV-V family chalcopyrite semiconductors consisting compounds and alloys based on (Mg,Zn,Cd)(Si,Ge,Sn)(P,As)2, show how they may offer excellent opportunities for development tandem thin-film solar cells. The constituent elements are abundant nearly lattice-matched can be found with near optimum band gaps. We close connection to structures other fourfold coordinated that have led highest efficiency...
Real-world performance, durability and reliability of microinverters are critical concerns for microinverter-equipped photovoltaic systems. We conducted a data-driven study the thermal performance 24 new (Enphase M215) connected to 8 different brands PV modules on dual-axis trackers at Solar Durability Lifetime Extension (SDLE) SunFarm Case Western Reserve University, based minute by power data from along with insolation environmental July through October 2013. The analysis shows strengths...
We present a description of an electroluminescence (EL) apparatus, easily sourced from commercially available components, with quantitative image processing platform that demonstrates feasibility for the widespread utility EL imaging as characterization tool. validated our system using Gage R&R analysis to find variance contribution by measurement 80.56%, which is typically unacceptable, but through and development correction factors 2.41% was obtained. further quantifying signal-to-noise...
ABSTRACT We explore the potential utility of II‐IV‐V semiconductor ZnGeAs 2 as absorber material in solar cells. As‐deposited films prepared by pulsed laser deposition are amorphous because limited substrate temperature that can be used without rapid loss volatile Zn and As. Thermal processing above 450 °C results crystallization improved electrical properties with hole mobilities high 58 cm /V s. The annealed were to fabricate p ‐type : n CdS cells on SnO ‐buffered borosilicate glass...
Aluminum-doped zinc oxide (AZO) is a low-temperature processed transparent conductive (TCO) made of earth abundant elements; its applications are currently limited by instability to heat, moisture, and acidic conditions. We demonstrate that the application an organofunctional silane modifier mitigates AZO degradation explore interplay between performance material composition morphology. Specifically, we evaluate bare APTES (3-aminopropyltriethoxysilane)-modified in response damp heat (DH, 85...
NASA has ambitious mission objectives requiring much faster transits to and from Mars, interstellar probes a gravity lens observatory. However, there been very little investment in transformational propulsion system development activities since the 1970s. There have dozens of concepts proposed for high acceleration solutions, but nearly all limited paper studies. A quick assessment was completed 2023 determine potential enable transits, with focus on crewed missions Mars. Far-term...
We report the above-band-gap dielectric-function spectra ${\ensuremath{\varepsilon}}_{a}=$ ${\ensuremath{\varepsilon}}_{a}$${}_{1}$ $+$ $i{\ensuremath{\varepsilon}}_{a}$${}_{2}$ of single-crystal ZnGeAs${}_{2}$ grown epitaxially on (001)GaAs, and study it theoretically. After surface overlayers were removed chemically to minimize artifacts, pseudodielectric-function...
The month-by-month method has been developed in the Solar Durability and Lifetime Extension (SDLE) Research Center with purpose of improving power output monitoring real world photovoltaic (PV) plants. This computes rate change ( <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ROC</i> ) system external variables are ranked based on their correlation changing to provide insight into possible degradation mechanisms PV modules. A data set...
Costs associated with conventional photovoltaic (PV) installations (module manufacturing, mounts, wiring and installation labor, etc.) scale linearly system area, prudent design practices for increasing the light harvesting may significantly enhance power output per unit area cost watt. The use of PV modules that have been augmented by addition a solar mirror provides an opportunity to improve module cost-per-watt considerations if is less expensive than relative increase in power. In order...
Aerospace In article number 2203920, Lyndsey McMillon-Brown, Sayanatani Ghosh, and co-workers report on the first long duration space flight of a metal halide perovskite photoactive layer International Space Station. Post-flight analysis reveals that samples exhibit superior photo-stability, no irreversible radiation damage, suppressed structural phase transition temperature, broadening photovoltaic operational range. These results confirm photovoltaics can be designed to endure environment.
We have studied the chalcopyrite compound ZnGeAs <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> to access its potential as a novel photovoltaic material. Thin films of ZnGeAs2 been produced by pulsed laser deposition.The are deposited at 315°C and amorphous. They crystallize above 450°C improve in crystallinity up including 600°C. At that temperature Hall mobility is 55 ± 2 cm <sup xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> /Vs,...