Photocurrent and electroluminescence spectra of InAs/GaAs quantum dots

Authors

Valynn Katrine Mag-usara National Institute of Physics, University of the Philippines Diliman
Elmer Estacio National Institute of Physics, University of the Philippines Diliman
Armando Somintac National Institute of Physics, University of the Philippines Diliman
Arnel Salvador National Institute of Physics, University of the Philippines Diliman

Abstract

Photocurrent (PC) and electroluminescence (EL) spectroscopy were performed on InAs/GaAs quantum dot and dot-in-a-well p-i-n devices. A blue-shifted photocurrent peak relative to the electroluminescence peak was revealed for the quantum dot p-i-n sample whereas a red-shifted PC peak was revealed for the dot-in-a-well device. Additional PC experiments showed that the blue-shift was not electric field-induced. The observed different energy shifts are explained in terms of dot size distribution and favored electron-hole recombination sites.

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Issue

2005: Proceedings of the 23rd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2005-PA-30

Section

Poster Session PA

Published

2005-10-26

How to Cite

[1]

VK Mag-usara, E Estacio, A Somintac, and A Salvador, Photocurrent and electroluminescence spectra of InAs/GaAs quantum dots, Proceedings of the Samahang Pisika ng Pilipinas 23, SPP-2005-PA-30 (2005). URL: https://proceedings.spp-online.org/article/view/SPP-2005-PA-30.