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Infrared Emitting PbS Nanocrystals through Matrix Encapsulation

Liyanage, Geethika Kaushalya
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403953924

Abstract Details

2014, Master of Science (MS), Bowling Green State University, Physics.
Colloidal semiconductor nanocrystals are becoming widely used materials in developing high performing light emitting devices in the Infrared region. The ability of tuning their properties at the colloidal stage and easy-low-cost processing of these Quantum Dot solutions in to nanocrystal solid devices makes them a perfect candidate in the device engineering process. One of the main challenges that present methods of making Infrared emitting thin film devices face is that both quantum yield efficiency and stability is compromised when processing them from colloidal stage to the solid state. The proposed method provides a better solution to this problem allowing a better assembly of Infrared emitting PbS nanocrystals encapsulated into an all inorganic matrix of wide band gap CdS. The newly proposed Semiconductor Matrix Encapsulation Nanocrystal Array (SMENA) method provides a better passivation in the PbS surfaces which can be optimized to reduce the non-radiative exciton decaying processes preserving the emission characteristics of the film. Due to the strong localization of the electrical charges, the films fabricated using modified SMENA method shows a bright emission yield compared to the current reported techniques. In addition to a high emission quantum yield, fabricated films exhibit excellent thermal and chemical stability, which avails their integration into solid state IR emitting technologies.
Mikhail Zamkov (Advisor)
Haowen Xi (Committee Member)
Liangfeng Sun (Committee Member)
51 p.
Chemical Engineering; Chemistry; Condensed Matter Physics; Engineering; Experiments; Materials Science; Nanoscience; Nanotechnology; Physics
nanomaterials; Lead sulfide; colloidal quantum dots; inorganic matrix; time-resolved fluorescence; quantum yield; Infrared materials; Matrix encapsulation

Recommended Citations

Citations

  • Liyanage, G. K. (2014). Infrared Emitting PbS Nanocrystals through Matrix Encapsulation [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403953924

    APA Style (7th edition)

  • Liyanage, Geethika. Infrared Emitting PbS Nanocrystals through Matrix Encapsulation. 2014. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403953924.

    MLA Style (8th edition)

  • Liyanage, Geethika. "Infrared Emitting PbS Nanocrystals through Matrix Encapsulation." Master's thesis, Bowling Green State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403953924

    Chicago Manual of Style (17th edition)

bgsu1403953924
705
© 2014, all rights reserved.
This open access ETD is published by Bowling Green State University and OhioLINK.