Diffusion characterization of antimony-based type-II superlattices using electron beam induced current and time-resolved photoluminescence

Yoon, Narae

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https://hdl.handle.net/2142/90959 Copy

Description

Title

Diffusion characterization of antimony-based type-II superlattices using electron beam induced current and time-resolved photoluminescence

Author(s)

Yoon, Narae

Issue Date

2016-04-29

Director of Research (if dissertation) or Advisor (if thesis)

Wasserman, Daniel M.

Department of Study

Electrical & Computer Eng

Discipline

Electrical & Computer Engr

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Type-II superlattices (T2SL)
• Electron beam induced current (EBIC)
• Diffusion Characteristics

Abstract

The infrared wavelength range is of vital importance for thermal imaging, molecular sensing, astronomy, and a variety of other health, medicine, and security and defense applications. Infrared detectors, capable of light detection in this vital wavelength range are thus of significant technological importance. In the past 10-15 years, type-II superlattices (T2SLs), primarily utilizing antimony-based III-V materials, have gained significant interest for their mid-wave or long-wave infrared (MWIR or LWIR) detection capabilities. Although T2SLs are predicted to have superior performance, when compared to the current state-of-the-art infrared detectors, such performance has yet to be demonstrated. A primary limiting factor in T2SL device performance is the thermal generation of carriers via a variety of defects and impurities in the T2SL material. Understanding these defects is key to improving T2SL detector performance. This thesis shows how to quantitatively characterize T2SL materials by using electron beam induced current (EBIC) and time-resolved photoluminescence (TRPL) technologies. Moreover, we investigate how the molar composition of antimony and gallium affect on the diffusion characteristics of this materials.

Graduation Semester

2016-05

Type of Resource

text

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http://hdl.handle.net/2142/90959

Copyright and License Information

Copyright 2016 Narae Yoon

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