Metoda fotokonduktivitas pada fotodioda semikonduktor

Iskandar , Lilik (1998) Metoda fotokonduktivitas pada fotodioda semikonduktor. Undergraduate thesis, FMIPA UNDIP.

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Abstract

Teiah dilakukan pengujian tentang metode fotokonduktivitas pada fotodioda semikonduktor untuk menentukan konstanta Planck, serta pengukuran kepekaan fotodioda dan tanggapan spektral fotodloda. Pada penelitian ini digunakan fotodioda silikon. Pada proses fotokonduksi, foton-foton cahaya dengan energi tertentu akan memberikan energlnya path elektron elektron di pita valensi, sehingga elektron-elektron tersebut akan dapat melewati celah energi yang terdapat path semikonduktor dan pindah ke pita konduksi. Selanjutnya elektron pada pita konduksi dan lubang yang ditinggalkan pada pita vaiensi akan berfungsi sebagal pembawa muatan yang menimbulkan arus. Energi elektron sebesar energi foton yang diberikan dikurangi dengan besarnya celah energl. Dengan mengukur kenaikan tegangan hasil konversi energi elektron tersebut, maka dapat ditentukan konstanta Planck. Metode fotokonduktivitas mempunyai beberapa kelemahan yang menyebabkan hasil konstanta Planck yang diperoleh menyimpang dart referensi. Kelemahan tersebut antara lain karena adanya ketakmurnian dan energl termal yang berpengaruh pada fotodloda semikonduktor. Sedang keuntungannya adalah blayanya murah dan peralatannya mudah diperoleh. An observation about photoconductivity method on the semiconductor photodiode has done to determine the Planck's constant. It has also done to measure the sensitivity of photodiode and its spectral respons. Photoconductive process is a process in the semiconductor where its conductivity wiil be raised if the semiconductor impinge by a given frequency light. It used silicon photodiode. In the photoconductive process, the light which consist of photons with a given energy will give its energy to the electron in the valence band, so it will jump over the energy gap of the semiconductor into the conduction band. Electron in conduction band and the left hole in valence band will take a role as charge carriers and contribute the current. The electron will have energy as much as the photon energy minus energy gap of the semiconductor. Its energy then will convert become the output voltage gain which also happen in photoconductive process. it cold be determined the Planck's constant from the output voltage gain. The photoconductivity method has some disadvantage which cause the result different with the reference. it is the impurity and thermal energy which affect the semiconductor photodiode. This document is Undip Institutional Repository Collection. The author(s) or copyright owners) agree that UNDIP-IR may, without changing the content, translate t6e subliiission to any medium or format for the purpose of preservation. The author(s) or copyright owner(s) also agree that UNDIP-IR may keep more than one copy of this submission for purposes of security, back-up and preservation. ( http://eprints.undip.ac.id) 1

Item Type:Thesis (Undergraduate)
Subjects:Q Science > QC Physics
Divisions:Faculty of Science and Mathematics > Department of Physics
ID Code:30406
Deposited By:Mr UPT Perpus 1
Deposited On:28 Oct 2011 11:42
Last Modified:28 Oct 2011 11:42

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