Electroluminescence hyperspectral imaging of light-emitting diodes using a liquid crystal tunable filter
Edwards, Paul R. and Bruckbauer, Jochen and Cameron, Douglas and Martin, Robert W. (2023) Electroluminescence hyperspectral imaging of light-emitting diodes using a liquid crystal tunable filter. Applied Physics Letters, 123 (11). 112110. ISSN 0003-6951 (https://doi.org/10.1063/5.0165060)
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Abstract
We demonstrate the use of a low-cost liquid-crystal-based wavelength-tunable filter and CMOS video camera to add hyperspectral imaging capabilities to a probe station equipped with a simple optical microscope. The resultant setup is used to rapidly resolve the spectral and spatial variations in electroluminescence typically observed for InxGa1−xN/GaN light-emitting diodes. Applying standard statistical analyses of variation within the multivariate datasets, such as moments and principal components, we observe inhomogeneities on a spectral scale significantly smaller than the bandwidth of the tunable filter. The resultant tool offers an alternative to scanning beam luminescence techniques for high-throughput hyperspectral analysis of optoelectronic devices.
ORCID iDs
Edwards, Paul R. ORCID: https://orcid.org/0000-0001-7671-7698, Bruckbauer, Jochen ORCID: https://orcid.org/0000-0001-9236-9320, Cameron, Douglas and Martin, Robert W. ORCID: https://orcid.org/0000-0002-6119-764X;-
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Item type: Article ID code: 86657 Dates: DateEvent15 September 2023Published27 August 2023Accepted26 June 2023SubmittedSubjects: Science > Physics > Optics. Light Department: Faculty of Science > Physics
Strategic Research Themes > Measurement Science and Enabling Technologies
Technology and Innovation Centre > Photonics
Technology and Innovation Centre > BionanotechnologyDepositing user: Pure Administrator Date deposited: 01 Sep 2023 11:13 Last modified: 25 Sep 2024 01:32 URI: https://strathprints.strath.ac.uk/id/eprint/86657