Electrical characterization of electron selective titanium dioxide and hole selective molybdenum trioxide heterocontacts on crystalline silicon

Download

index.pdf

Date

2017

Author

Ahiboz, Doğuşcan

Metadata

Show full item record

Item Usage Stats

117
views

54
downloads

Transition metal oxides are promising materials as an alternative to the conventional charge transport layers in photovoltaic solar cells with the advantages of carrier selectivity and low processing temperatures. In this study, electronic properties of the hole transporting – electron blocking layer (HT-EBL) of sub-stoichiometric Molybdenum (III) Oxide (MoO3-x) and electron transporting – hole blocking layer (ET-HBL) of Titanium (II) Oxide (TiO2-x) were studied. For this purpose, carrier selective metal oxide layers with different thickness and deposition conditions were deposited over n-type and p-type crystalline silicon wafers in the structure of Metal-Oxide-Semiconductor (MOS) capacitor. Admittance analysis (capacitance and conductance methods) and current – voltage methods were employed for the characterization of the MOS capacitors. At the end of this study, best deposition condition and the metal oxide thickness for the most effective carrier transportation at the silicon – metal oxide interface and through the metal oxide layer were determined.

Subject Keywords

Titanium dioxide., Molybdenum., Crystallization., Electrons., Silicon.

URI

http://etd.lib.metu.edu.tr/upload/12621591/index.pdf
https://hdl.handle.net/11511/26736

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Fabrication and characterization of PEDOT:PSS hole transport layers for silicon solar cells Türkay, Deniz; Yerci, Selçuk; Department of Micro and Nanotechnology (2019) Heterojunction silicon solar cells have gained considerable interest in recent years with the demonstration of record-high device performances. However, these devices are typically based on inorganic layers fabricated at high temperatures under vacuum environment, using toxic precursors. The low temperature budget, non-toxic chemical contents, and wide range of adjustability in physical and electrical properties make poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) a promising candidate a...
Characterization and contact resistivity studies of ito thin films for use in silicon heterojunction solar cells Güler, Seçil; Erçelebi, A. Çiğdem.; Department of Physics (2020) Transparent conductive oxides (TCO) are widely used in optoelectronic devices such as flat panel displays and solar cells. Indium tin oxide, due to its wide optical bandgap and high transmittance in the visible spectrum, is commonly used for device applications such as anti-reflective coating, front TCO layer in silicon heterojunction solar cells. When ITO is used as TCO layer, the carrier transport mechanism through the junction is improved due to the decrease in the free carrier absorption. In this study,...
Silicon nanostructures for electro-optical and photovoltaic applications Kulakcı, Mustafa; Turan, Raşit; Department of Physics (2012) Recently extensive efforts have been spent in order to achieve all silicon based photonic devices exploiting the efficient light emission from nanostructured silicon systems. In this thesis, silicon based nanostructures have been investigated for electro-optical and photovoltaic applications. The thesis focused on three application areas of silicon nanostructures: Light emitting diode (LED), light modulation using quantum confined Stark effect (QCSE) and photovoltaic applications. In the context of LED appl...
Fabrication and investigation of extremely thin CdTe absorber layer solar cells Hosseini, Arezoo; Erçelebi, Ayşe Çiğdem; Turan, Raşit; Department of Physics (2016) Extremely thin absorber layer (ETA) solar cells aim to combine the advantages of using very thin and cheaply produced absorber layer on nano structured substrates with stability of all-solid-state solar cells. This type of photovoltaic devices use a nano structured interpenetrating heterojunction of thin light-absorbing layer at the interface between an n- and p-type semiconductors. N-type nano structured TiO2 layer is deposited on a Transparent Conducting Oxide coated glass (TCO) substrate, following with ...
Design, syntheses and structure-property relationships of benzazole and isoindigo comprising conducting polymers/ Göker, Seza; Toppare, Levent Kamil; Department of Chemistry (2019) Donor–acceptor (D–A) conjugated polymers have been widely used for potential applications such as organic light emitting diodes, solar cells, electrochromic devices and organic field effect transistors. Benzazole comprising conducting polymers are popular for the last few decades since they can be used as low-band-gap donor materials because of their strong intramolecular charge transfer characteristics and excellent photovoltaic performances. Strong electron-donating and withdrawing building blocks are nec...

Citation Formats

D. Ahiboz, “Electrical characterization of electron selective titanium dioxide and hole selective molybdenum trioxide heterocontacts on crystalline silicon,” M.S. - Master of Science, Middle East Technical University, 2017.