Study of the Interface in a GaP/Si Heterojunction Solar Cell
Rebecca Saive,Hal S. Emmer,Christopher T. Chen,Chaomin Zhang,Christiana B. Honsberg,Harry A. Atwater +5 more
TLDR
In this article, X-ray photoelectron spectroscopy (XPS) was performed on thin layers of GaP grown on Si by metal organic chemical vapor deposition and molecular beam epitaxy.Abstract:
We have investigated the GaP/Si heterojunction interface for application in silicon heterojunction solar cells. We performed X-ray photoelectron spectroscopy (XPS) on thin layers of GaP grown on Si by metal organic chemical vapor deposition and molecular beam epitaxy. The conduction band offset was determined to be 0.9 ± 0.2 eV, which is significantly higher than predicted by Anderson's rule (0.3 eV). XPS also revealed the presence of Ga–Si bonds at the interface that are likely to be the cause of the observed interface dipole. Via cross-sectional Kelvin probe force microscopy ( x -KPFM), we observed a charge transport barrier at the Si/GaP interface which is consistent with the high-conduction band offset determined by XPS and explains the low open-circuit voltage and low fill factor observed in GaP/Si heterojunction solar cells.read more
Citations
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S-Shaped Current–Voltage Characteristics in Solar Cells: A Review
TL;DR: In this article, a review of studies in which s-shaped I-V curves have appeared is presented, and the cause and mitigation are discussed, with the aim to provide an overarching picture of the common mechanisms and universal guidelines for mitigation of S-shaped current-voltage characteristics in emerging solar cell technologies.
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Reliable carbon dioxide photoreduction by a rational electron transfer cycle formed on a nanorod-shaped CdS/Fe2O3 heterojunction catalyst
TL;DR: In this article, a narrowbandgap oxide catalyst was developed as a light absorber and the selectivity of the desired product upon conversion to CO2 was improved by heterogeneously joining CdS nanorods and cheap Fe2O3 particles.
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An integrated GaInP/Si dual-junction solar cell with enhanced efficiency using TOPCon technology
Manish Verma,Guru Prasad Mishra +1 more
TL;DR: In this paper, a dual-junction solar cell is designed with carrier-selective tunnel oxide passivated contact (CS-TOPCon) technology, where the lattice mismatch between the subcells is reduced by inserting buffer layer in the top cell.
Journal ArticleDOI
ARTEMIS: Ab initio restructuring tool enabling the modelling of interface structures
Ned Thaddeus Taylor,Francis H. Davies,Isiah Edward Mikel Rudkin,Conor J. Price,Tsz Hin Chan,S. P. Hepplestone +5 more
TL;DR: Using several test cases, it is demonstrated how ARTEMIS can both identify the location of an interface in existing structures, and also predict an optimum interface separation based upon the parents’ atomic structures, which aims to accelerate and inform the study of interface science.
Journal ArticleDOI
Energy-dependent amplitude of Brillouin oscillations in GaP
TL;DR: In this paper, the authors measured the dependence of the amplitude of the differential reflectivity as modulated by coherent acoustic phonons (CAPs) as a function of laser probe energy.
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