High output power from 260 nm pseudomorphic ultraviolet light-emitting diodes with improved thermal performance
JR Grandusky, SR Gibb, MC Mendrick… - Applied physics …, 2011 - iopscience.iop.org
JR Grandusky, SR Gibb, MC Mendrick, C Moe, M Wraback, LJ Schowalter
Applied physics express, 2011•iopscience.iop.orgThis letter reports on the improved performance of a pseudomorphic ultraviolet light-emitting
diode (LED). At 100 mA input current, 9.2 mW of quasi-CW output power was measured in a
calibrated integrating sphere. The addition of a heat sink, required for CW and higher power
operation, introduced a numerical aperture of 0.86, and 72 mW was measured in pulsed
mode at 1.7 A, indicating that the total output power exceeds 100 mW when corrected by the
coupling factor. The high characteristic temperature of 983 K was instrumental in achieving …
diode (LED). At 100 mA input current, 9.2 mW of quasi-CW output power was measured in a
calibrated integrating sphere. The addition of a heat sink, required for CW and higher power
operation, introduced a numerical aperture of 0.86, and 72 mW was measured in pulsed
mode at 1.7 A, indicating that the total output power exceeds 100 mW when corrected by the
coupling factor. The high characteristic temperature of 983 K was instrumental in achieving …
Abstract
This letter reports on the improved performance of a pseudomorphic ultraviolet light-emitting diode (LED). At 100 mA input current, 9.2 mW of quasi-CW output power was measured in a calibrated integrating sphere. The addition of a heat sink, required for CW and higher power operation, introduced a numerical aperture of 0.86, and 72 mW was measured in pulsed mode at 1.7 A, indicating that the total output power exceeds 100 mW when corrected by the coupling factor. The high characteristic temperature of 983 K was instrumental in achieving these record output powers for an LED with wavelength shorter than 265 nm.
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