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Proceedings Paper

High voltage series connected Si photovoltaic cells
Author(s): Rupal K. Patel; Robert D. Nasby; David J. Stein; Alex H. Hsia; Reid S. Bennett
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Paper Abstract

This report describes the features of monolithic, series connected silicon (Si) photovoltaic (PV) cells which have been developed for applications requiring higher voltages than obtained with conventional single junction solar cells. These devices are intended to play a significant role in micro / mini firing systems and fuzing systems for DOE and DOD applications. They are also appropriate for other applications (such as micro-electro-mechanical-systems (MEMS) actuation as demonstrated by Bellew et. al.) where electric power is required in remote regions and electrical connection to the region is unavailable or deemed detrimental for whatever reason. Our monolithic device consists of a large number of small PV cells, combined in series and fabricated using standard CMOS processing on silicon-on-insulator (SOI) wafers with 0.4 to 3 micron thick buried oxide (BOX) and top Si thickness of 5 and 10 microns. Individual cell isolation is achieved using the BOX layer of the SOI wafer on the bottom. Isolation along the sides is produced by trenching the top Si and subsequently filling the trench by deposition of dielectric films such as oxide, silicon nitride, or oxynitride. Multiple electrically isolated PV cells are connected in series to produce voltages ranging from approximately 0.5 volts for a single cell to several thousands of volts for strings of thousands of cells.

Paper Details

Date Published: 23 August 2005
PDF: 8 pages
Proc. SPIE 5871, Optical Technologies for Arming, Safing, Fuzing, and Firing, 58710F (23 August 2005); doi: 10.1117/12.619527
Show Author Affiliations
Rupal K. Patel, Sandia National Labs. (United States)
Robert D. Nasby, Sandia National Labs. (United States)
David J. Stein, Sandia National Labs. (United States)
Alex H. Hsia, Sandia National Labs. (United States)
Reid S. Bennett, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 5871:
Optical Technologies for Arming, Safing, Fuzing, and Firing
William J. Thomes; Fred M. Dickey, Editor(s)

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