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Power Generation from a Radiative Thermal Source Using a Large-Area Infrared Rectenna

Journal Article · · Physical Review Applied

Electrical power generation from a moderate-temperature thermal source by means of direct conversion of infrared radiation is important and highly desirable for energy harvesting from waste heat and micropower applications. Here, we demonstrate direct rectified power generation from an unbiased large-area nanoantenna-coupled tunnel diode rectifier called a rectenna. Using a vacuum radiometric measurement technique with irradiation from a temperature-stabilized thermal source, a generated power density of 8 nW / cm2 is observed at a source temperature of 450°C for the unbiased rectenna across an optimized load resistance. The optimized load resistance for the peak power generation for each temperature coincides with the tunnel diode resistance at zero bias and corresponds to the impedance matching condition for a rectifying antenna. Current-voltage measurements of a thermally illuminated large-area rectenna show current zero crossing shifts into the second quadrant indicating rectification. Photon-assisted tunneling in the unbiased rectenna is modeled as the mechanism for the large short-circuit photocurrents observed where the photon energy serves as an effective bias across the tunnel junction. Furthermore, the measured current and voltage across the load resistor as a function of the thermal source temperature represents direct current electrical power generation.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1464206
Alternate ID(s):
OSTI ID: 1439137
Report Number(s):
SAND--2018-2950J; 662295
Journal Information:
Physical Review Applied, Journal Name: Physical Review Applied Journal Issue: 5 Vol. 9; ISSN 2331-7019; ISSN PRAHB2
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Electrical power generation from moderate-temperature radiative thermal sources journal February 2020

Figures / Tables (7)


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