Low-cost growth of III-V and II-VI semiconductor thin films
Abstract/Contents
- Abstract
- This dissertation explores methods to obtain high-quality, low-cost III-V and II-VI semiconductor thin films. Silicon is the predominant semiconductor material of choice for most electronics applications, but non-silicon semiconductors may be more well-suited to certain applications. III-V materials such as GaAs and InP have favorable optoelectronic properties but are currently too expensive to compete in the market. Methods that could separate III-V thin films from their substrates could lower these costs significantly. In the first section InP single-crystal thin films are separated from their substrates with the selective absorption of a short and intense laser pulse, a process called epitaxial laser liftoff. The physical mechanisms driving laser liftoff are explored and compared with GaAs liftoff, and spatially-resolved measurements of the threshold fluence for liftoff and transmitted intensity through a wafer are devised. Conversely, II-VI based semiconductors like Cu2ZnSnSe4 are more defect-tolerant and simpler than silicon to manufacture, but are not efficient enough to be cost-effective. Alloying this material with Cu2ZnGeSe4 could allow for tuning of the properties for improved performance. In the second section Cu2ZnSn(1-x)Ge(x)Se4 thin films in the composition range 0< x< 1 are grown by co-sputtering and reactive annealing. Growth conditions are described that yield single phase films for all values x, tunable band gaps in the range 1.0 to 1.5 eV, or composition gradients through-thickness for band gap grading. The mechanisms for growth and recipe to produce dense thin films with large, faceted grains are also provided.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2017 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Jan, Antony |
|---|---|
| Associated with | Stanford University, Department of Materials Science and Engineering. |
| Primary advisor | Clemens, B. M. (Bruce M.) |
| Thesis advisor | Clemens, B. M. (Bruce M.) |
| Thesis advisor | Lindenberg, Aaron Michael |
| Thesis advisor | Salleo, Alberto |
| Advisor | Lindenberg, Aaron Michael |
| Advisor | Salleo, Alberto |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Antony Jan. |
|---|---|
| Note | Submitted to the Department of Materials Science and Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2017. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2017 by Antony Kim Amur Jan
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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