Inlämning av Examensarbete / Submission of Thesis

Arif Muhammad , pp. 66. ING/School of Engineering, 2012.

The work

Författare / Author: Arif Muhammad
Titel / Title: Electrical Characterization of Semiconductor Materials Using Deep Level Transient Spectroscopy
Abstrakt Abstract:

Semiconductor materials, due to their high performance capabilities, are widely used in electronic and optoelectronic devices. The properties of band gap play a significant role in characteristics of semiconductor materials. Electrical properties of semiconductor materials are greatly affected by variations in their band structures. Impurities are added to semiconductor materials to get the desired properties. Semiconductor materials have several types of defects (shallow defects and Deep Level Defects) which influence their properties, which in-turns affect the efficiency of the electronic devices.
Gallium Nitride (GaN) and its ternary alloy Aluminum Gallium Nitride (AlGaN), are used for fabrication of electronic and optoelectronic devices. They can be affected by several defects which need to be characterized, to use the material in more efficient way. Shallow defects are frequently reported and explained theoretically; but the Deep Level Defects (DLDs) are rarely reported and therefore our study is focused on finding and characterizing the Deep Level Defects.
In this study, the electrical and optical properties of several semiconductor materials are experimentally tested using Deep Level Transient Spectroscopy (DLTS) Technique, and the results are presented for n-type AlxGa1-xN, with different Aluminum (Al) mole fractions as, x = 0.0, 0.14 and 0.20. As we increase the Al mole fraction, the electron traps moves deeper into the energy band gap. Some types of DLDs were found, which were never reported before.

Ämnesord / Subject: Signalbehandling - Signal Processing
Elektroteknik - Electrotechnology
Nyckelord / Keywords: Deep Level Transient Spectroscopy, Semiconductors, Boxcar

Publication info

Dokument id / Document id: houn-8ybjhc
Program:/ Programme Magisterprogram i Elektroteknik / Master of Science in Electrical Engineering
Registreringsdatum / Date of registration: 09/20/2012
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Dr. Wlodek Kulesza
Examinator / Examiner: Abbas Mohammed
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: ING/School of Engineering

+46 455 38 50 00

Files & Access

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