2,352 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Solar Cells"  
Results: 1 - 24 next
open access

Stability and degradation in triple cation and methyl ammonium lead iodide perovskite solar cells mediated via Au and Ag electrodes

Description: Article focuses on the fact that there are no clear mechanisms for the interaction of electrode-induced absorber degradation pathways. Furthermore, the authors hypothesize that the formation of AgI in the PSCs, leads to corrosion of the perovskite absorber, as opposed to the benign AuI when Au electrodes are used in the solar cell stack.
Date: November 3, 2022
Creator: Kranthiraja, Kakaraparthi; Parashar, Mritunjaya; Mehta, Ravindra K.; Aryal, Sujan; Temsal, Mahdi & Kaul, Anupama
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

Optical Property and Stability Study of CH₃(CH₂)₃NH₃)₂(CH₃NH₃)₃Pb₄I₁₃ Ruddlesden Popper 2D Perovskites for Photoabsorbers and Solar Cells and Comparison with 3D MAPbI₃

Description: Article discussing two-dimensional organic halide layered perovskites in the Ruddlesden Popper structure (CH3(CH2)3NH3)2(CH3NH3)n􀀀1PbnI3n+1) layered perovskites in the Ruddlesden Popper structure, represented as BA2MA3Pb4I13 for the n = 4 formulation, for both photoabsorbers in a two-terminal architecture and solar cells. A comparative study of the 3DP and 2DP film stability was also conducted.
Date: September 20, 2022
Creator: Kranthiraja, Kakarapathi; Aryal, Sujan; Temsal, Mahdi; Sharma, Mohin & Kaul, Anupama
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

Stability and degradation in triple cation and methyl ammonium lead iodide perovskite solar cells mediated viaAu andAg electrodes

Description: Article states that perovskite solar cells (PSCs), particularly based on the methyl ammonium lead iodide (MAPbI3) formulation, have been of intense interest for the past decade within the photovoltaics (PV) community, but their long-term stability under operational conditions and environmental storage are still prime challenges to be overcome towards their commercialization. The authors have conducted a comprehensive analysis on the impact of the electrode collector layer, specifically Ag and A… more
Date: September 3, 2022
Creator: Kakaraparthi, Kranthiraja; Parashar, Mritunjaya; Mehta, Ravindra K.; Aryal, Sujan; Temsal, Mahdi & Kaul, Anupama
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

Methylammonium Lead Tri-Iodide Perovskite Solar Cells with Varying Equimolar Concentrations of Perovskite Precursors

Description: Article conducting a systematic study to tune the equimolar precursor ratio of the organic halide (methylammonium iodide; MAI) and metal halide (lead iodide; PbI2) in a fixed solvent mixture of N,N-dimethylformamide (DMF):dimethylsulfoxide (DMSO).
Date: December 9, 2021
Creator: Parashar, Mritunjaya & Kaul, Anupama
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

Encapsulated perovskite in NiO nanotube for topological meta-photonic devices

Description: Data management plan for the grant, "Encapsulated perovskite in NiO nanotube for topological meta-photonic devices." Research studying meta-photonic devices with high absorption and topological photonic devices using encapsulated perovskites in NiO nanotubes. The goal is to achieve high-efficiency solar cells and electrically pumped laser in perovskite/NiO nanotubes patterned in the graded photonic super-crystal. The success of this project will lead to high-efficiency integrated lasers and sol… more
Date: 2021-09-01/2024-08-31
Creator: Cui, Jingbiao & Lin, Yuankun
Item Type: Refine your search to only Text
Partner: UNT College of Science
open access

Sol-gel synthesized indium tin oxide as a transparent conducting oxide with solution-processed black phosphorus for its integration into solar-cells

Description: This article describes the synthesis of indium tin oxide (ITO) thin films using solgel processing with a mixture of InCl₃, methanol, and SnCl₂, where the solutions were spin coated onto glass substrates. The combined architecture of black phosphorus on ITO thin films shows promise in its use for transparent electronics, which can also serve as a stepping stone for future solar cell platforms.
Date: October 9, 2020
Creator: Mehta, Ravindra; Min, Misook & Kaul, Anupama
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

Inkjet Printed Transition Metal Dichalcogenides and Organohalide Perovskites for Photodetectors and Solar Cells

Description: This dissertation is devoted to the development of novel devices for optoelectronic and photovoltaic applications using the promise of inkjet printing with two-dimensional (2D) materials. A systematic approach toward the characterization of the liquid exfoliated 2D inks comprising of graphene, molybdenum disulfide (MoS2), tungsten diselenide (WSe2), and 2D perovskites is discussed at depth. In the first study, the biocompatibility of 2D materials -- graphene and MoS2 -- that were drop cast onto… more
Date: May 2020
Creator: Hossain, Ridwan Fayaz
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Synthesis and Characterization of π-Extended Benzoporphyrins

Description: Porphyrins offer a very synthetically flexible template which can be modified in numerous ways to synthesize molecules with very useful properties applicable in areas such as non-linear optical properties, photodynamic therapy, dye-sensitized solar cells, chemical sensors and organic electronic devices. β-Substituted π-extended porphyrins offer unique capabilities in tuning the properties of the molecule towards practical applications. Increased π-conjugation allows the HOMO-LUMO gap to decreas… more
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: May 2019
Creator: Kumar, Siddhartha
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Simulink® Based Design and Implementation of a Solar Power Based Mobile Charger

Description: Electrical energy is used at approximately the rate of 15 Terawatts world-wide. Generating this much energy has become a primary concern for all nations. There are many ways of generating energy among which the most commonly used are non-renewable and will extinct much sooner than expected. Very active research is going on both to increase the use of renewable energy sources and to use the available energy with more efficiency. Among these sources, solar energy is being considered as the most a… more
Date: May 2016
Creator: Mukka, Manoj Kumar
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Molecules and Materials for Excitonic Solar Cells Using P-type Metal Oxide Semiconductors

Description: This dissertation has two intersecting foci; firstly, the discovery of a new methodology for the growth of high surface area cuprous oxide (Cu2O) substrates. Secondly, the synthesis and characterization of electron-accepting molecules, and their incorporation into excitonic solar cells (XSCs) using the Cu2O substrates as electrodes. Increasing the surface area of the semiconductor creates more locations for charge transfer to occur thus increasing the overall efficiency of the device. Zinc oxid… more
Date: August 2015
Creator: Haynes, Keith M.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Acceptor-sensitizers for Nanostructured Oxide Semiconductor in Excitonic Solar Cells

Description: Organic dyes are examined in photoelectrochemical systems wherein they engage in thermal (rather than photoexcited) electron donation into metal oxide semiconductors. These studies are intended to elucidate fundamental parameters of electron transfer in photoelectrochemical cells. Development of novel methods for the structure/property tuning of electroactive dyes and the preparation of nanostructured semiconductors have also been discovered in the course of the presented work. Acceptor sensiti… more
Date: August 2014
Creator: Berhe, Seare Ahferom
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Synthesis of Tethering Group on Borylazadipyrromethene Dyes to Apply to Photogalvanic Dye-sensitized Solar Cells

Description: This is my thesis research on the preparation of borylazadipyrromethene (azaBODIPY) dyes bearing an anchoring group, such as a carboxylic acid group, at the β-pyrrolic position of the azadipyrromethene scaffold. Carboxylate groups form covalent bonds to oxide semiconductors such as TiO2 (n-type) or Cu2O (p-type) in dye-sensitized solar cells (DSCs) or photogalvanic dye-sensitized solar cells (P-DSCs). Oxide-binding azaBODIPY dyes can be used to investigate the rate and mechanism of electron inj… more
Date: August 2014
Creator: Park, Eunsol
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Substitution Effects of Phenothiazine and Porphyrin Dyes in Dye-sensitized Solar Cells

Description: The details of dye sensitized solar cells was explained and phenothiazine and porphyrin based dyes were synthesized for use in DSSCs. DSSCs offer a unique and cost effective method of renewable energy. DSSCs are characterized through various tests, with the overall efficiency, η, bearing the greatest importance. Incident photon to current conversion efficiency, or IPCE, is also another important characterization of DSSCs. Effect of positioning of the cyanoacrylic acid anchoring group on ring… more
Date: December 2013
Creator: Hart, Aaron S.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Development of Advanced CdTe Solar Cells Based on High Temperature Corning Glass Substrates: Cooperative Research and Development Final Report, CRADA Number CRD-10-373

Description: NREL has developed advanced processes for CdTe solar cells, but because of the temperature limitations of conventional soda lime glass, many of these processes have not been transferred to manufacturing. Corning is developing high temperature substrate glasses that are believed to be manufacturable and will lead to lower $/watt modules costs. The purpose of this CRADA is to evaluate these glasses in the advanced NREL processes. In addition, the CRADA seeks to develop manufacturable processes fo… more
Date: August 1, 2013
Creator: Barnes, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quantum Dots Promise to Significantly Boost Solar Cell Efficiencies (Fact Sheet)

Description: In the search for a third generation of solar-cell technologies, a leading candidate is the use of 'quantum dots' -- tiny spheres of semiconductor material measuring only about 2-10 billionths of a meter in diameter. Quantum dots have the potential to dramatically increase the efficiency of converting sunlight into energy -- perhaps even doubling it in some devices -- because of their ability to generate more than one bound electron-hole pair, or exciton, per incoming photon. NREL has produced … more
Date: August 1, 2013
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rapid Deposition Technology Holds the Key for the World's Largest Manufacturer of Thin-Film Solar Modules (Fact Sheet)

Description: First Solar, Inc. has been collaborating with NREL since 1991, advancing its thin-film cadmium telluride solar technology to grow from a startup company to become one of the world's largest manufacturers of solar modules, and the world's largest manufacturer of thin-film solar modules.
Date: August 1, 2013
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tellurium-Containing Conjugated Materials for Solar Cells: From Sulfur to Tellurium

Description: A series of diketopyrrolopyrrole(DPP)-based small molecules have been synthesized by palladium-catalyzed coupling reactions. Electron-donating moieties (benzothiophene, benzoselenophene, and benzotellurophene) are bridged by an electron-withdrawing DPP unit to generate donor-acceptor-donor (D-A-D) type molecules. We observe red-shifts in absorption spectra of these compounds by varying heteroatoms from sulfur to tellurium. In bulk heterojunction solar cells with [6,6]phenyl-C61-butyric acid met… more
Date: April 3, 2013
Creator: S., Park Y.; Kale, T.; Wu, Q.; Ocko, B.M. & Black, C.T., Grubbs, R.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Metallic Inks for Solar Cells: Cooperative Research and Development Final Report, CRADA Number CRD-10-370

Description: This document describes the statement of work for National Renewable Energy Laboratory (NREL) as a subcontractor for Applied Nanotech, Inc. (ANI) for the Phase II SBIR contract with the Department of Energy to build silicon solar cells using non-contact printed, nanoparticle-based metallic inks. The conductive inks are based upon ANI's proprietary method for nanoparticle dispersion. The primary inks under development are aluminum for silicon solar cell back plane contacts and copper for top int… more
Date: April 1, 2013
Creator: van Hest, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Report

Description: The project addressed the need for improved multijunction solar cells as identified within the Solar America Initiative program. The basic Ge/InGaAs/InGaP triple-junction structure that has led to record commercial efficiencies remains unoptimized due to excess current in the germanium component. Furthermore, its deployment cannot be scaled up to terawatt-level applications due to bottlenecks related to germanium’s cost and abundance. The purpose of the program was to explore new strategie… more
Date: January 3, 2013
Creator: Kouvetakis, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Scientific/Technical Report

Description: This symposium aimed to bring together researchers working on quantifying nanoscale carrier transport processes in excitonic solar cells. Excitonic solar cells, including all-organic, hybrid organic-inorganic and dye-sensitized solar cells (DSSCs), offer strong potential for inexpensive and large-area solar energy conversion. Unlike traditional inorganic semiconductor solar cells, where all the charge generation and collection processes are well understood, these excitonic solar cells contain e… more
Date: November 21, 2012
Creator: Bommissetty, Venkat
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NREL Explores Earth-Abundant Materials for Future Solar Cells (Fact Sheet)

Description: Researchers at the National Renewable Energy Laboratory (NREL) are using a theory-driven technique - sequential cation mutation - to understand the nature and limitations of promising solar cell materials that can replace today's technologies. Finding new materials that use Earth-abundant elements and are easily manufactured is important for large-scale solar electricity deployment.
Date: October 1, 2012
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Report: Sintered CZTS Nanoparticle Solar Cells on Metal Foil; July 26, 2011 - July 25, 2012

Description: This is the final report covering 12 months of this subcontract for research on high-efficiency copper zinc tin sulfide (CZTS)-based thin-film solar cells on flexible metal foil. Each of the first three quarters of the subcontract has been detailed in quarterly reports. In this final report highlights of the first three quarters will be provided and details will be given of the final quarter of the subcontract.
Date: September 1, 2012
Creator: Leidholm, C.; Hotz, C.; Breeze, A.; Sunderland, C.; Ki, W. & Zehnder, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterizing the Nanoscale Layers of Tomorrow___s Electronics An Application of Fourier Analysis

Description: Thin film applications are of great interest to the semiconductor industry due to the important role they play in cutting edge technology such as thin film solar cells. X-Ray Reflectivity (XRR) characterizes thin films in a non-destructive and efficient manner yet complications exist in extracting these characteristics from raw XRR data. This study developed and tested two different algorithms to extract quantity of layers and thickness information on the nanometer scale from XRR data. It was c… more
Date: August 24, 2012
Creator: Payne, Christopher Bishop & /SLAC, /Princeton U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar Grade Silicon from Agricultural By-products

Description: In this project, Mayaterials developed a low cost, low energy and low temperature method of purifying rice hull ash to high purity (5-6Ns) and converting it by carbothermal reduction to solar grade quality silicon (Sipv) using a self-designed and built electric arc furnace (EAF). Outside evaluation of our process by an independent engineering firm confirms that our technology greatly lowers estimated operating expenses (OPEX) to $5/kg and capital expenses (CAPEX) to $24/kg for Sipv production, … more
Date: August 20, 2012
Creator: Laine, Richard M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen