Absence of efficiency droop in fin Light Emitting Diodes (LEDs)

Babak Nikoobakht; Robin P. Hansen; Yuqin Zong; Amit Agrawal; Michael Shur

doi:10.1117/12.2569808

21 August 2020 Absence of efficiency droop in fin Light Emitting Diodes (LEDs)

Babak Nikoobakht, Robin P. Hansen, Yuqin Zong, Amit Agrawal, Michael Shur

Proceedings Volume 11465, Low-Dimensional Materials and Devices 2020; 114650P (2020) https://doi.org/10.1117/12.2569808
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

We introduce a novel fin LED architecture that eliminates “efficiency droop”. Efficiency droop, which is the decline in internal quantum efficiency with increasing current density, is one of the significant challenges facing wide bandgap LED. In this presentation, we present data on how nanofins as quasi one-dimensional nanoLEDs would operate at low and high injection current densities and how electron-hole recombination is influenced because of the shape and size of the recombination region. Results include temperature-dependent electroluminescence of fin LEDs as well as dependence of their total radiant flux (optical output power) on injected current. We show unique examples of droop-free operation of fin LEDs at extremely high injection current densities beyond 1 million A/cm2. A three-parameter model based on the radiative and nonradiative processes (ABC) including the SRH and Auger recombination is presented that provides insight on how the non-radiative Auger recombination proces

Conference Presentation

Citation Download Citation

Babak Nikoobakht, Robin P. Hansen, Yuqin Zong, Amit Agrawal, and Michael Shur "Absence of efficiency droop in fin Light Emitting Diodes (LEDs)", Proc. SPIE 11465, Low-Dimensional Materials and Devices 2020, 114650P (21 August 2020); https://doi.org/10.1117/12.2569808

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