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Investigation of the device degradation for commercial light-emitting diodes (LEDs) using spatially and time-resolved electro- and photoluminescence
Author(s): Nassim Rahimi; Alain Price; Xinhua Pan; Askari Ghasempour; Francis Ndi
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Paper Abstract

Commercial LEDs with different colors (ex. InGaN and AlInGaP) were studied using spatially and time resolved Electroluminescence (EL) and Photoluminescence (PL) measurements. A novel experimental setup was used enabling performance of all these techniques at the same point with high temporal resolution, speed and accuracy. LEDs under the study demonstrated inhomogeneous broadening of the luminescence peak. PL and EL spectra observed for these LEDs were different as a result of different radiative transitions attributed to each phenomenon. Time-resolved data for fixed wavelengths demonstrated multiple time spectra at different photon emission energies due to inhomogeneous distribution of Gallium and Indium for InGaN or Gallium and aluminum for AlGaInN.

Paper Details

Date Published: 1 March 2019
PDF: 13 pages
Proc. SPIE 10918, Gallium Nitride Materials and Devices XIV, 109180O (1 March 2019); doi: 10.1117/12.2510846
Show Author Affiliations
Nassim Rahimi, Horiba Scientific (United States)
Alain Price, Horiba Scientific (United States)
Xinhua Pan, Horiba Scientific (United States)
Askari Ghasempour, Horiba Scientific (United States)
Francis Ndi, Horiba Scientific (United States)

Published in SPIE Proceedings Vol. 10918:
Gallium Nitride Materials and Devices XIV
Hiroshi Fujioka; Hadis Morkoç; Ulrich T. Schwarz, Editor(s)

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