Initial Benchmarks of UV LEDs and Comparisons with White LEDs

Technical Report · Mon Nov 01 04:00:00 EDT 2021

DOI:https://doi.org/10.2172/1859677· OSTI ID:1859677

Davis, J. Lynn ^[1]; Rountree, Kelley ^[1]; Pope, Roger ^[1]; Clayton, Clint ^[1]; Dart, Andrew ^[1]; McCombs, Michelle ^[1]; Wallace, Abdal ^[1]

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1. RTI International, Research Triangle Park, NC (United States)

The primary goal of this report is to benchmark the initial level of performance of a selection of commercial UV LEDs across all three bands (i.e., UV-A, UV-B, UV-C). To provide the initial performance benchmarks, a test matrix containing 13 different UV LED products was created in association with the LED Systems Reliability Consortium (LSRC). The products in this test matrix were all commercially available as of June 2021, and at least 22 samples of each product were tested. In addition, two common, commercial white LEDs were tested to provide a benchmark against blue-pumped white LEDs. Testing of the samples included electrical performance testing (e.g., current-voltage measurements) and photometric testing in a calibrated integrating sphere capable of measuring devices in the UV-A, UV-B, and UV-C bands. The electrical testing provided insights into the performance of the semiconductor layers in the LEDs, allowing parameters such as the threshold voltage (V_th) and serial resistance (R_serial) of each sample to be determined. The photometric testing provided insights into emission wavelengths, peak shapes, and radiant efficiencies for each sample. Combined, the information from these tests permits the overall device efficiencies to be compared and provides insights into the electrical and optical performance of the technology.

• Research Organization: RTI International, Research Triangle Park, NC (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office
• DOE Contract Number: FE0025912
• OSTI ID: 1859677
• Report Number(s): DOE/EE-2543; 8841
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING
LED
Light-emitting diodes
UV
ultraviolet