Integrated solar energy harvesting and storage

Authors:
Nathaniel J. Guilar;Travis J. Kleeburg;Albert Chen;Diego R. Yankelevich;Rajeevan Amirtharajah
Affiliations:
Agilent Laboratories, Santa Clara, CA;Department of Electrical and Computer Engineering, University of California, Davis, CA;Faraday Technology, Sunnyvale, CA;Department of Electrical and Computer Engineering, University of California, Davis, CA;Department of Electrical and Computer Engineering, University of California, Davis, CA
Venue:
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Year:
2009

Citing 7
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Abstract

To explore integrated solar energy harvesting as a power source for low power systems, an array of energy scavenging photodiodes based on a passive-pixel architecture for CMOS imagers has been fabricated together with storage capacitors implemented using on-chip interconnect in a 0.35-µm bulk process. Integrated vertical plate capacitors enable dense energy storage without limiting optical efficiency. Tests were conducted with both a white light source and a green laser. Measurements indicate that 225 µW/mm2 output power may be generated by white light with an intensity of 20 kLUX.