Modulation response, mixed-mode oscillations and chaotic spiking in quantum dot light emitting diode

Anno: 2015

Autori: Al Husseini H.B., Al Naimee K.A., Al Khursan A.H., Abdalah S.F., Khedir A.H., Meucci R., Arecchi F.T.

Affiliazione autori: 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.

Giornale/Rivista: CHAOS SOLITONS & FRACTALS

Volume: 78      Da Pagina: 229  A: 237

Parole chiavi: 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 diodes
DOI: 10.1016/j.chaos.2015.07.033

Citazioni: 8
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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