Silicon Germanium Quantum Well Solar Cell

Metadata Updated: November 12, 2020

A single crystal SiGe has enormous potentials for high performance chips and solar cells. This project seeks to fabricate a rudimentary but 1st cut quantum-well photovoltaic (PV) cell and assess/demonstrate PV function. Quantum-well structures embodied on single crystal silicon germanium drastically enhanced carrier mobilities.  The cell-to-cell circuits of quantum-well PV cells are laid out at the bottom of epitaxial layers, unlike the circuits laying out at the top of the conventional PV cells which cut off the incident solar flux up to 15% level. Since the circuit layout is built at the bottom of PV array, the circuits are densely laid out to reduce the internal resistance substantially. Again since silicon germanium compound has much broader bandgap structure than silicon alone, it can utilize more solar energy to free up valence band electrons. Structurally, the sapphire substrate surface of quantum-well PV cells is very strong and does not require any special protective coatings and frames to hold them. Therefore, the anticipated life of quantum-well PV cells is more than ten-times longer than Si PV cells. Summing up these advantages of quatum-well PV cells, the overall conversion efficiency would reach well beyond 35% and the energy density would be tripled as compared to the conventional PV cells. The overall cost factor would be 5 cents per kWh competitively.  

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_12019
Data First Published 2014-10-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash 3e075ad1a86a967eee3da7e876b3fe1b226ea00d
Source Schema Version 1.1

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