Modulation response, mixed-mode oscillations and chaotic spiking in quantum dot light emitting diode
Year: 2015
Authors: Al Husseini H.B., Al Naimee K.A., Al Khursan A.H., Abdalah S.F., Khedir A.H., Meucci R., Arecchi F.T.
Autors Affiliation: Univ Baghdad, Coll Sci, Deptartment Phys, Baghdad, Iraq; Thi Qar Univ, Sci Coll, NNRL, Nassiriya, Iraq; Ist Nazl Ott CNR, I-50125 Florence, Italy.
Abstract: In this work quantum dot light emitting diode (QD-LED) was modeled in a dimensionless rate equations system where it is not done earlier. The model was examined first under bias current without any external perturbation where it exhibits chaotic phenomena since the model has multi-degrees of freedom. Then, it is perturbed by both small signal and direct current modulations (DCM), separately. The system exhibits mixed-mode oscillations (MMOs) under DCM. This behavior was reasoned to continuous states of two dimensional wetting layer (WL) which works as a reservoir to quantum dot (QD) states. QD capture was the dominant rate controlling the dynamic behavior in QD-LED. The nonlinear dynamic behavior of our model is compared very well to the experimental observations in the QD-LED.
Journal/Review: CHAOS SOLITONS & FRACTALS
Volume: 78 Pages from: 229 to: 237
KeyWords: Degrees of freedom (mechanics); Modulation; Nanocrystals; Oscillators (mechanical); Quantum theory; Semiconductor quantum dots, DCM; External perturbations; Mixed mode oscillations; MMOs; Modulation response; Multi degrees of freedom; Nonlinear dynamic behaviors; Quantum-dot light emitting diodes, Light emitting diodesDOI: 10.1016/j.chaos.2015.07.033Citations: 8data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-27References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here