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Ryan_O'Dell_Thesis.pdf (10.75 MB)

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Optical and Electonic Characterization of PbS Quantum Dot Films

O'Dell, Ryan A
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1382959190

Abstract Details

2013, Master of Science (MS), Bowling Green State University, Physics.
I report the design, fabrication, and characterization of colloidal PbS nanocrystals (NC's semiconductors for there use as photo voltaic structures and thin films. I also explain the design and method for film deposition of the NC's for use of the Hall effect experiment. Using a layer by layer deposition technique via dip coating a controlled layer of PbS NC'S can be grown on top of an amorphous substrate. These films were electrically conductive with thickness from .365 (μ m) to .571(μ m) having a roughness on the average of Ra = 0.017(μ m). Conductivity of these films vaired by the size of the quantum dots and the ligands used to spatially separate adjacent quantum dots. PbS QD films were fabricated using 1,2-ethanedithiol (EDT), 3-mercatopropionic acid (MPA), 6-mercaptohexanoic acid (MHA) and 8-mercaptaoctanaic acid (MOA) to spatially separate quantum dots from one another. The EDT separated 7.2 nm QD film .365 (μ m) had a conductivity of (1.85 X 10-4Ω-1cm-1) and the .571 μm had a conductivity of (2.61 X 10-4Ω-1cm-1 ). The EDT separated 5.1 nm QD film .311 μm had a conductivity of (1.98 X 10-3Ω-1cm-1). Films using EDT ligands had the highest conductivity due to the main means of charge transport being tunneling through hopping conduction. These films using (MOA, MHA) produced photo-luminescent films with higher intensity and more distinguished absorption peaks. Hall mobilities couldn't be accurately determined due to low carrier concentration limiting the magnitude of the Hall voltage.
LiangFeng Sun (Advisor)
Haowen Xi (Committee Member)
Mikhail Zamkov (Committee Member)
64 p.
Nanotechnology; Optics; Physics
Hall mobility; PbS Quantum Dots; Conductivity; Quantum Dot passivation

Recommended Citations

Citations

  • O'Dell, R. A. (2013). Optical and Electonic Characterization of PbS Quantum Dot Films [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1382959190

    APA Style (7th edition)

  • O'Dell, Ryan. Optical and Electonic Characterization of PbS Quantum Dot Films. 2013. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1382959190.

    MLA Style (8th edition)

  • O'Dell, Ryan. "Optical and Electonic Characterization of PbS Quantum Dot Films." Master's thesis, Bowling Green State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1382959190

    Chicago Manual of Style (17th edition)

bgsu1382959190
2,167
© 2013, all rights reserved.
This open access ETD is published by Bowling Green State University and OhioLINK.