@inproceedings{1e9a0b1632384ab2ab5af91b0901b3cd,
title = "Effect of Micron-scale Photoluminescence Variation on Droop Measurements in InGaN/GaN Quantum Wells",
abstract = "Micro-photoluminescence maps reveal micron-scale spatial variation in intensity, peak emission energy and bandwidth across InGaN/GaN quantum wells. To investigate the effect of this spatial variation on measurements of the dependence of emission efficiency on carrier density, excitation power-dependent emission was collected from a bright and dark region on each of blue-and green emitting samples. The onset of efficiency droop was found to occur at a greater carrier density in the dark regions than in the bright, by factors of 1.2 and 1.8 in the blue and green-emitting samples, respectively. By spatially integrating the emission from progressively larger areas, it is also shown that collection areas greater than ~50 μm in diameter are required to reduce the intensity variation to less than 10%.",
author = "Rachel Barrett and {Ahumada Lazo}, Ruben and {Alanis Azuara}, {Juan Arturo} and Patrick Parkinson and Stephen Church and Kappers, {Menno J.} and Oliver, {Rachel A.} and David Binks",
note = "Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd.",
year = "2021",
month = may,
day = "1",
doi = "10.1088/1742-6596/1919/1/012011",
language = "English",
volume = "1919",
series = "Journal of Physics: Conference Series",
publisher = "IOP Publishing Ltd",
booktitle = "J. Phys.: Conf. Ser.",
address = "United Kingdom",
edition = "1",
}