Event Details
Photovoltaic investigation of GaAs1-xBix
Presenter: Mahsa Mahtab
Supervisor:
Date: Thu, September 17, 2020
Time: 10:00:00 - 11:00:00
Place: ZOOM - Please see below.
ABSTRACT
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UNIVERSITY OF VICTORIA
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
GRADUATE STUDENT SEMINAR - ECE 609
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Title: Photovoltaic investigation of GaAs1-xBix
Speaker: Mahsa Mahtab
Supervisor: Prof. Thomas Tiedje
Thursday, Sep 17 at 10 AM - 11 AM.
Location: zoom online platform (link provided at the end of the email).
Abstract:
In 2017, solar power provided 1.7% of total worldwide electricity production, growing 35% from the previous year. The current world record solar cell efficiency is held by multi-junction devices that absorb different portions of the solar spectrum in different sub-cells. Theoretical studies show the enhancement of GaAs-based multi junction solar cell overall efficiency by adding a 1eV GaAsBi sub-cell to exceed 50% efficiency.
In this study, single junction of dilute GaAs1−xBix p-n junctions were grown by molecular beam epitaxy method and solar cell devices were fabricated. The standard solar performance and impedance spectrum of the structures was measured and is reported for the first time.
GaAs1−xBix (x= 03, 0.7 and 1.1%) based p+/n and n+/p heterostructure photovoltaic performance was characterized through IV and CV measurement. By introduction of Bi into GaAs, a non-zero EQE below the GaAs band edge energy was observed. External quantum efficiency spectrum was modeled to find the minority carrier diffusion lengths of electrons and holes in the p-doped and n-doped GaAs92Bi08 with the doping profile of 1015 - 1016 cm-3.
Mahsa Mahtab is inviting you to a scheduled Zoom meeting.
Topic: Seminar
Time: Sep 17, 2020 10:00 AM Vancouver
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https://uvic.zoom.us/j/99915343906?pwd=d2xZMUVTWU9kWDNDM21hT2xYM3ZnQT09
Meeting ID: 999 1534 3906
Password: 623826
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