Millah, Fitrotul (2022) Studi Komputasi Pengaruh Ketebalan Dan Strain Pada Performa Termoelektrik Germanium Selenida. Other thesis, Institut Teknologi Sepuluh Nopember.
|
Text
01111840000013-Undregraduate_thesis.pdf Restricted to Repository staff only Download (5MB) | Request a copy |
Abstract
Termoelektrik merupakan mekanisme untuk mengubah energi panas menjadi energi listrik secara langsung. Melimpahnya sumber energi panas menjadikan termoelektrik sebagai teknologi yang menjanjikan untuk sumber energi alternatif. Saat ini, banyak penelitian dilakukan untuk mendapatkan material dengan performa termoelektrik yang baik agar dapat meningkatkan efisiensi. Performa termoelektrik suatu material diukur dengan besaran figure of merit (/)) yang dipengaruhi oleh koefisien Seebeck, konduktivitas listrik, dan konduktivitas termal. Germanium Selenida (GeSe) merupakan material yang berpotensi memiliki performa termoelektrik yang baik karena memiliki koefisien Seebeck tinggi dan konduktivitas termal rendah. Pada penelitian ini, dilakukan perhitungan untuk mengetahui sifat elektronik dan termoelektrik material GeSe, serta mengkaji potensi peningkatan performa termoelektrik material tersebut melalui mekanisme variasi ketebalan dan strain engineering. Penelitian ini dilakukan secara komputasi dengan menggunakan metode density functional theory (DFT) dan Boltzmann transport theory yang terimplementasi pada perangkat lunak Quantum ESPRESSO dan BoltzTraP2. Dari penelitian yang dilakukan, didapatkan nilai /) untuk GeSe monolayer struktur puckered sebesar 2,24 dan struktur buckled sebesar 13,96. Pengurangan ketebalan struktur GeSe berpengaruh terhadap peningkatan nilai band gap dan /). Sedangkan penerapan strain engineering pada GeSe berpengaruh pada perubahan performa termoelektriknya, dimana nilai /) tertinggi dihasilkan pada variasi strain 10% pada arah 0 untuk struktur puckered.
===================================================================================================================================
Thermoelectric is a mechanism to directly convert heat into electricity. The abundance of heat sources makes thermoelectric a promising technology for alternative energy sources. Currently, a lot of research is being done to obtain materials with good thermoelectric performance in order to increase efficiency. The thermoelectric performance of materials is measured by figure of merit (/)) that is affected by the Seebeck coefficient, electrical conductivity, and thermal conductivity. Germanium Selenide (GeSe) is a material that has the potential to have good thermoelectric performance because its high Seebeck coefficient and low thermal conductivity. In this study, calculations were carried out to determine the electrical properties and thermoelectricity of GeSe materials, to assess the potential for improving thermoelectric performance through the mechanism of thickness variation and strain engineering. This research carried out computationally using the density functional theory (DFT) method and Boltzmann transport theory implemented in Quantum ESPRESSO and BoltzTraP2. From the research conducted, the value of /) for puckered monolayer GeSe is 2,24 and for the buckled structure is 13,96. The reduction of GeSe thickness causes an increase in the value of band gap and /). While the implementation of strain engineering affects the changes in thermolectric performance, with the highest v
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | DFT, Efek Ketebalan, GeSe, Strain Engineering, Termoelektrik, GeSe, Strain Engineering, Thickness Effect, Thermoelectric |
| Subjects: | Q Science > QC Physics Q Science > QC Physics > QC1 Dielectrics |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Marsudiyana - |
| Date Deposited: | 15 Dec 2025 07:25 |
| Last Modified: | 15 Dec 2025 07:25 |
| URI: | http://repository.its.ac.id/id/eprint/128978 |
Actions (login required)
![]() |
View Item |
