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116 results for “Solar cell”
Third FAIRmat users meeting Nov2023 - FAIR Data Principles in Perovskite Solar Cell Research using NOMAD - Daniel Baumann
<p>Daniel Baumann (doctoral research project at KIT in the group of Ulrich Paetzold) highlights how NOMAD Oasis supports experimental materials researchers in the field of perovskite photovoltaics. A live demonstration of experimental planning, documentation, as well as automated data evaluation is presented. Particularly, in conjunction with a highly repeatable robotic spin-coating setup, the realization of this vast potential may be closer than anticipated. </p>
Dataset for "Role of electron-phonon coupling and thermal expansion on band gaps, carrier mobility, and interfacial offsets in kesterite thin-film solar cells"
<p>Dataset for "Role of electron-phonon coupling and thermal expansion on band gaps, carrier mobility, and interfacial offsets in kesterite thin-film solar cells"</p>
Data for "Identification of Killer Defects in Kesterite Thin-Film Solar Cells"
<p>**README**</p> <p>Data for "Identification of Killer Defects in Kesterite Thin-Film Solar Cells"</p> <p>DOI: 10.1021/acsenergylett.7b01313</p> <p><br> * File Tree <br> ---<br> * DFT_CALC // Row input file for DFT calculation (VASP)<br> * XX_DEFECT_CZTS(e) // Data for CZTS (or CZTSe)<br> * XX_PRIM(ORTHO/221) // Data for bulk (primitive, orthogonal or 2X2X1 supercell)<br> * XX_Defect // Data for defect (V_S, Sn_Cu, Sn_Zn, Cu_Sn)<br> * XX_q // SCF calculation with charge state q <br> * fig // data used to draw figures<br> * 00_atomic_structure <br> * 01_charge_transition_level<br> * 02_charge_density<br> * 03_configuration_coordinate<br> * 20_SI_PHASE_DIAGRAM</p>
Dataset for "Open-Circuit Voltage Deficit in Cu2ZnSnS4 Solar Cells by Interface Band Gap Narrowing"
<p><strong>Files in "ExchangeCorrelation": POSCAR_material_Exc</strong></p> <p><em>material</em></p> <ul> <li>CdS </li> <li>CZTS = Cu2ZnSnS4</li> <li>CZTSe = Cu2ZnSnSe4</li> </ul> <p><em>Exchange-correlation functionals</em></p> <ul> <li>PBE</li> <li>RP = revised PBE</li> <li>PBEsol</li> <li>AM05</li> <li>SCAN</li> <li>HSE06</li> <li>6_6: PBE+U (U= 6 eV for Cu d and Zn d)</li> <li>8_8: PBE+U (U= 8 eV for Cu d and Zn d)</li> </ul> <p><strong>Files in "Interface"</strong></p> <p>POSCAR_S_fixed: CZTS/CdS interface, CdS layers were fully relaxed.<br> POSCAR_S_PBE_U: CZTS/CdS interface, the atomic coordinates were relaxed using PBE+U<br> POSCAR_S_SCAN_U: CZTS/CdS interface, the atomic coordinates were relaxed using SCAN+U<br> POSCAR_Se_fixed: CZTSe/CdS interface, CdS layers were fully relaxed.<br> POSCAR_Se_PBE_U: CZTSe/CdS interface, the atomic coordinates were relaxed using PBE+U<br> POSCAR_Se_SCAN_U: CZTSe/CdS interface, the atomic coordinates were relaxed using SCAN+U</p>
Figure 2 in High Efficiency All-Polymer Solar Cells
Figure 2. – Desmodema polystictum, 14.8 cm total length, caught off Lakshadweep waters.
Self-assembled molecules for hole extraction in efficient inverted PbS quantum dot solar cells
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Correlating the Photoshunt with Charge-Collection Losses in Organic Solar Cells
<p>Data of figures shown in the main and supporting information of the paper "Correlating the Photoshunt with Charge-Collection Losses in Organic Solar Cells".</p>
Dataset of "Mapping of Internal Ionic/Electronic Transient Dynamics in Current-Voltage Operation of Perovskite Solar Cells"
<p><span>This dataset supports the article: "Mapping of Internal Ionic/Electronic Transient Dynamics in Current-Voltage Operation of Perovskite Solar Cells" </span></p> <p><span>Raw data for the article "Mapping of Internal Ionic/Electronic Transient Dynamics in Current-Voltage Operation of Perovskite Solar Cells". For further details see the readme.txt file.</span></p>
Data for "Photoluminescence tells us about voltages, recombination and diode factors in solar cells"
<p>Detailed description in "Photoluminescence tells us about voltages, recombination and diode factors in solar cells"</p> <p>by</p> <p>Susanne Siebentritt, Thomas Paul Weiss, Mohit Sood, Max Hilaire Wolter, Alberto Lomuscio, Omar Ramirez</p> <p>submitted to J. Phys. Materials</p>
Impact of RbF and NaF Postdeposition Treatments on Charge Carrier Transport and Recombination in Ga-Graded Cu(In,Ga)Se2 Solar Cells
<p>Excel file with data to all figures published in our article found at <a href="https://doi.org/10.1002/adfm.202103663">https://doi.org/10.1002/adfm.202103663 </a>(Advanced Functional Materials)</p>
Interplay between Li and Na amid co-doped solution-processed Cu2ZnSn(S,Se)4 absorbers for solar cells
<p>Alkali doping and alloying are well-known strategies to improve the performance of Cu<sub>2</sub>ZnSn(S,Se)<sub>4</sub> (CZTSSe) absorber based thin film solar cells. The effects of individual light alkali elements such as Li and Na have been thoroughly investigated, with both dopants resulting in significant improvements in performance of CZTSSe solar cells. Here, the combined effects of Li and Na are investigated in a so-called co-doping approach to capture the benefits from both elements simultaneously. In order to do that, various concentrations of Li and Na between 0.0 M and 0.5 M are added to the solution used for spin coating of the precursor layer. After annealing under Se-enriched atmosphere, the two alkali elements displayed mutual dependency of in terms of their concentrations in the CZTSSe absorber layer. Furthermore, both, Li and Na showed signs of forming alloys with the CZTSSe phase. The efficiencies of the best Li-Na co-doped solar cells are above 10%, slightly above the Li baseline thanks to increased open-circuit-voltage and short-circuit current. A non-negligible Na incorporation was observed even in nominally Na-free devices, likely from indirect contamination from the SLG substrate. Further work is needed to better understand Na-poor compositions and draw conclusions relevant to Na-free substrates.</p>
Numerical Investigation of Interface Passivation Strategies for Sb2Se3/CdS Solar Cells
<p>Sb<sub>2</sub>Se<sub>3</sub> is an emerging earth-abundant material praised for its promising optoelectronic properties, although the presence of interfacial defects at the vicinity of the p–n junction limit its performance as photovoltaic absorber. Using a device modeling approach and a realistic set of material parameters, it unravels pathways mitigating the impact of interfacial defects with a baseline Sb<sub>2</sub>Se<sub>3</sub>/CdS. Two straightforward strategies are devised and tested against the baseline. First, a thin front surface sulfurization of the Sb<sub>2</sub>Se<sub>3</sub> absorber allowing a local lowering of the valence band and creating a “front surface field,” resulting in an increased carrier selectivity and limiting the density of holes available for interface recombination, leading to a significant efficiency improvement for optimized conditions. Second, the use of an ultrathin insulating Al<sub>2</sub>O<sub>3</sub> layer between the absorber and the buffer layer is considered, helping in preventing detrimental chemical interdiffusion at the junction. This strategy provides a direct interface passivation, though the interlayer thickness needs a fine tuning to balance the benefits of reduced interface recombination and a detrimental Al<sub>2</sub>O<sub>3</sub> low-conductivity layer. In each case, an analysis covering a broad range of parameters is presented, and conclusions are made in the frame of past numerical and experimental results.</p>
Artificial space weathering to mimic solar wind enhances the toxicity of lunar dust simulants in human lung cells
<p>During NASA's Apollo missions, inhalation of dust particles from lunar regolith was identified as a potential occupational hazard for astronauts. These fine particles adhered tightly to spacesuits and were unavoidably brought into the living areas of the spacecraft. Apollo astronauts reported that exposure to the dust caused intense respiratory and ocular irritation. This problem is a potential challenge for the Artemis Program, which aims to return humans to the Moon for extended stays in this decade. Since lunar dust is "weathered" by space radiation, solar wind, and the incessant bombardment of micrometeorites, we investigated whether treatment of lunar regolith simulants to mimic space weathering enhanced their toxicity. Two such simulants were employed in this research, Lunar Mare Simulant-1 (LMS-1), and Lunar Highlands Simulant-1 (LHS-1), which were added to cultures of human lung epithelial cells (A549) to simulate lung exposure to the dusts. In addition to pulverization, previously shown to increase dust toxicity sharply, the simulants were exposed to hydrogen gas at high temperature as a proxy for solar wind exposure. This treatment further increased the toxicity of both simulants, as measured by the disruption of mitochondrial function, and damage to DNA both in mitochondria and in the nucleus. By testing the effects of supplementing the cells with an antioxidant (N-acetylcysteine), we showed that a substantial component of this toxicity arises from free radicals. It remains to be determined to what extent the radicals arise from the dust itself, as opposed to their active generation by inflammatory processes in the treated cells.</p>
Low-loss contacts on textured substrates for inverted perovskite solar cells
<p>Inverted perovskite solar cells (PSCs) promise enhanced operating stability compared to their normal-structure counterparts. To improve efficiency further, it is crucial to combine effective light management with low interfacial losses. Here we develop a conformal self-assembled monolayer as the hole-selective contact on light-managing textured substrates. Molecular dynamics simulations indicate cluster formation during phosphonic acid adsorption leads to incomplete SAM coverage. We devise a co-adsorbent strategy that disassembles high-order clusters, thus homogenizing the distribution of phosphonic acid molecules, thereby minimizing interfacial recombination and improving electronic structures. We report a lab-measured power-conversion efficiency (PCE) of 25.3% and a certified quasi-steady-state PCE of 24.8% for inverted PSCs, with a photocurrent approaching 95% of the Shockley-Queisser maximum. An encapsulated device having a PCE of 24.6% at room temperature retains 95% of its peak performance when stressed at 65°C and 50% relative humidity following > 1000 hours of maximum power point tracking under 1-sun illumination. </p>
Exploring the potential of biphenylamine and triphenylamine-based sensitizers for enhanced efficiency more than 8% in dye-sensitized solar cells
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Artificial space weathering to mimic solar wind enhances the toxicity of lunar dust simulants in human lung cells
Open the record for dataset details and reuse information.
Ab initio electronic stopping power for protons in Ga0.5In0.5P/GaAs/Ge triple-junction solar cells for space applications
Motivated by the radiation damage of solar panels in space, firstly, the results of Monte Carlo particle transport simulations are presented for proton impact on triple-junction Ga0.5In0.5P/GaAs/Ge solar cells, showing the proton projectile penetration in the cells as a function of energy. It is followed by a systematic ab initio investigation of the electronic stopping power for protons in different layers of the cell at the relevant velocities via real-time time-dependent density functional theory (RT-TDDFT) calculations. The electronic stopping power is found to depend significantly on different channeling conditions, which should affect the low velocity damage predictions, and which are understood in terms of impact parameter and electron density along the path. Additionally, we explore the effect of the interface between the layers of the multilayer structure on the energy loss of a proton, along with the effect of strain in the lattice-matched solar cell. Both effects are found to be small compared with the main bulk effect. The interface energy loss has been found to increase with decreasing proton velocity, and in one case, there is an effective interface energy gain.
Effects of Cd1-xZnxS alloy composition and post-deposition air anneal on ultra-thin CdTe solar cells produced by MOCVD
<p>Ultra-thin CdTe:As/Cd<sub>1-x</sub>Zn<sub>x</sub>S photovoltaic solar cells with an absorber thickness of 0.5 µm were deposited by metal-organic chemical vapour deposition on indium tin oxide coated boro-aluminosilicate substrates. The Zn precursor concentration was varied to compensate for Zn leaching effects after CdCl<sub>2</sub> activation treatment. Analysis of the solar cell composition and structure by X-ray photoelectron spectroscopy depth profiling and X-ray diffraction showed that higher concentrations of Zn in the Cd<sub>1‑x</sub>Zn<sub>x</sub>S window layer resulted in suppression of S diffusion across the CdTe/Cd<sub>1‑x</sub>Zn<sub>x</sub>S interface after CdCl<sub>2 </sub>activation treatment. Excessive Zn content in the Cd<sub>1-x</sub>Zn<sub>x</sub>S alloy preserved the spectral response in the blue region of the solar spectrum, but increased series resistance for the solar cells. A modest increase in the Zn content of the Cd<sub>1-x</sub>Zn<sub>x</sub>S alloy together with a post-deposition air anneal resulted in an improved blue response and an enhanced open circuit voltage and fill factor. This device yielded a mean efficiency of 8.3% over 8 cells (0.25 cm<sup>2</sup> cell area) and best cell efficiency of 8.8%.</p>
Controlled Li Alloying by Post-Synthesis Electrochemical Treatment of Cu2ZnSn(S, Se)4 Absorbers for Solar Cells
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Data from: Evaluating the influence of novel charge transport materials on the photovoltaic properties of MASnI3 solar cells
<p>In recent decades, substantial advancements have been made in photovoltaic technologies, leading to impressive power conversion efficiencies exceeding 25% in perovskite solar cells (PSCs). Tin-based perovskite materials, characterized by their low band gap (1.3 eV), exceptional optical absorption, and high carrier mobility, have emerged as promising absorber layers in PSCs. Achieving high performance and stability in PSCs critically depends on the careful selection of suitable charge transport layers (CTLs). This research investigates the effects of five copper-based hole transport materials and two carbon-based electron transport materials in combination with methyl ammonium tin iodide (MASnI<sub>3</sub>). The carbon-based CTLs exhibit excellent thermal conductivity and mechanical strength, while the copper-based CTLs demonstrate high electrical conductivity. The study comprehensively analyzes the influence of these CTLs on PSC performance, including band alignment, quantum efficiency, thickness, doping concentration, defects, and thermal stability. Furthermore, a comparative analysis is conducted on PSC structures employing both p-i-n and n-i-p configurations. The highest-performing PSCs are observed in the inverted structures of CuSCN/MASnI3/C60 and CuAlO<sub>2</sub>/MASnI<sub>3</sub>/C<sub>60</sub>, achieving power conversion efficiencies (PCE) of 23.48% and 25.18%, respectively. Notably, the planar structures of Cu<sub>2</sub>O/MASnI<sub>3</sub>/C<sub>60</sub> and CuSbS<sub>2</sub>/MASnI<sub>3</sub>/C<sub>60</sub> also exhibit substantial PCE, reaching 20.67% and 20.70%, respectively.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.