Nano-structured hybrid organic/inorganic electronic devices

Tamer Dogan

Research output: ThesisPhD Thesis - Research UT, graduation UTAcademic

106 Downloads (Pure)

Abstract

Organic semiconductors have attracted a lot of attention with their unique electrical (tunable bandgap), optical (photoluminescence) and physical (flexibility) abilities. A number of applications, such as organic light-emitting diodes, flexible electronic devices, biodegradable sensors etc. are realized thanks to these properties. However, fundamental understanding of organic semiconductor materials and devices is still necessary in order to obtain near-ideal performance from current and future applications. In light of this quest, this thesis presents a variety of fabrication procedures that provides better device performances or pathways to investigate unique features of organic semiconductors. The proposed methodologies rely on silicon substrates and also utilize a number of inorganic dielectric materials and metal electrodes. Combining organic and inorganic materials creates an easy-to-fabricate hybrid devices. In addition, using nanofabrication processing technologies, devices with nanostructured substrate and confined organic materials are realized. When one or more dimensions of the organic and inorganic materials measure below 100 nm and 20 nm respectively, they provide unique phenomena. For example, when silicon is confined in three-dimensions, it shows increased photoluminescence, and organic semiconductors present increased diffusion of charge carriers when confined between two electrodes.

The thesis starts with introducing motivation in Chapter 1. The band structure of (organic) semiconductors and transport characteristics of organic FETs are discussed in Chapter 2. Chapter 3 explains nano-fabrication techniques used throughout the thesis. In Chapter 4, high-density arrays of crystalline silicon nanostructures are fabricated using lithography techniques of DTL and edge lithography (EL). In Chapter 5 a method based on a high-quality nanoscale template for patterning 1D organic nanostructures is introduced. Chapter 6 describes the fabrication of vertical organic field-effect transistors that has 100 nm thick P3HT nano-pillars with a surrounding gate dielectric (alumina, Al2O3) and gate electrode (aluminum, Al) around them. A unique vertical organic field-effect transistor structure in which highly doped silicon nanopillars are utilized as a gate electrode is demonstrated in Chapter 7. Lastly, Chapter 8 concludes the thesis with a useful outlook.
Original languageEnglish
Awarding Institution
  • University of Twente
Supervisors/Advisors
  • van der Wiel, Wilfred Gerard, Supervisor
Award date29 May 2019
Place of PublicationEnschede
Publisher
Print ISBNs978-90-365-4761-1
DOIs
Publication statusPublished - 29 May 2019

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Semiconducting organic compounds
Silicon
Organic field effect transistors
Electrodes
Nanotechnology
Lithography
Nanostructures
Photoluminescence
Flexible electronics
Fabrication
Aluminum Oxide
Gate dielectrics
Optical band gaps
Organic light emitting diodes (OLED)
Substrates
Semiconductor devices
Field effect transistors
Aluminum
Charge carriers
Band structure

Cite this

Dogan, Tamer . / Nano-structured hybrid organic/inorganic electronic devices. Enschede : University of Twente, 2019. 107 p.
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title = "Nano-structured hybrid organic/inorganic electronic devices",
abstract = "Organic semiconductors have attracted a lot of attention with their unique electrical (tunable bandgap), optical (photoluminescence) and physical (flexibility) abilities. A number of applications, such as organic light-emitting diodes, flexible electronic devices, biodegradable sensors etc. are realized thanks to these properties. However, fundamental understanding of organic semiconductor materials and devices is still necessary in order to obtain near-ideal performance from current and future applications. In light of this quest, this thesis presents a variety of fabrication procedures that provides better device performances or pathways to investigate unique features of organic semiconductors. The proposed methodologies rely on silicon substrates and also utilize a number of inorganic dielectric materials and metal electrodes. Combining organic and inorganic materials creates an easy-to-fabricate hybrid devices. In addition, using nanofabrication processing technologies, devices with nanostructured substrate and confined organic materials are realized. When one or more dimensions of the organic and inorganic materials measure below 100 nm and 20 nm respectively, they provide unique phenomena. For example, when silicon is confined in three-dimensions, it shows increased photoluminescence, and organic semiconductors present increased diffusion of charge carriers when confined between two electrodes.The thesis starts with introducing motivation in Chapter 1. The band structure of (organic) semiconductors and transport characteristics of organic FETs are discussed in Chapter 2. Chapter 3 explains nano-fabrication techniques used throughout the thesis. In Chapter 4, high-density arrays of crystalline silicon nanostructures are fabricated using lithography techniques of DTL and edge lithography (EL). In Chapter 5 a method based on a high-quality nanoscale template for patterning 1D organic nanostructures is introduced. Chapter 6 describes the fabrication of vertical organic field-effect transistors that has 100 nm thick P3HT nano-pillars with a surrounding gate dielectric (alumina, Al2O3) and gate electrode (aluminum, Al) around them. A unique vertical organic field-effect transistor structure in which highly doped silicon nanopillars are utilized as a gate electrode is demonstrated in Chapter 7. Lastly, Chapter 8 concludes the thesis with a useful outlook.",
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year = "2019",
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Nano-structured hybrid organic/inorganic electronic devices. / Dogan, Tamer .

Enschede : University of Twente, 2019. 107 p.

Research output: ThesisPhD Thesis - Research UT, graduation UTAcademic

TY - THES

T1 - Nano-structured hybrid organic/inorganic electronic devices

AU - Dogan, Tamer

PY - 2019/5/29

Y1 - 2019/5/29

N2 - Organic semiconductors have attracted a lot of attention with their unique electrical (tunable bandgap), optical (photoluminescence) and physical (flexibility) abilities. A number of applications, such as organic light-emitting diodes, flexible electronic devices, biodegradable sensors etc. are realized thanks to these properties. However, fundamental understanding of organic semiconductor materials and devices is still necessary in order to obtain near-ideal performance from current and future applications. In light of this quest, this thesis presents a variety of fabrication procedures that provides better device performances or pathways to investigate unique features of organic semiconductors. The proposed methodologies rely on silicon substrates and also utilize a number of inorganic dielectric materials and metal electrodes. Combining organic and inorganic materials creates an easy-to-fabricate hybrid devices. In addition, using nanofabrication processing technologies, devices with nanostructured substrate and confined organic materials are realized. When one or more dimensions of the organic and inorganic materials measure below 100 nm and 20 nm respectively, they provide unique phenomena. For example, when silicon is confined in three-dimensions, it shows increased photoluminescence, and organic semiconductors present increased diffusion of charge carriers when confined between two electrodes.The thesis starts with introducing motivation in Chapter 1. The band structure of (organic) semiconductors and transport characteristics of organic FETs are discussed in Chapter 2. Chapter 3 explains nano-fabrication techniques used throughout the thesis. In Chapter 4, high-density arrays of crystalline silicon nanostructures are fabricated using lithography techniques of DTL and edge lithography (EL). In Chapter 5 a method based on a high-quality nanoscale template for patterning 1D organic nanostructures is introduced. Chapter 6 describes the fabrication of vertical organic field-effect transistors that has 100 nm thick P3HT nano-pillars with a surrounding gate dielectric (alumina, Al2O3) and gate electrode (aluminum, Al) around them. A unique vertical organic field-effect transistor structure in which highly doped silicon nanopillars are utilized as a gate electrode is demonstrated in Chapter 7. Lastly, Chapter 8 concludes the thesis with a useful outlook.

AB - Organic semiconductors have attracted a lot of attention with their unique electrical (tunable bandgap), optical (photoluminescence) and physical (flexibility) abilities. A number of applications, such as organic light-emitting diodes, flexible electronic devices, biodegradable sensors etc. are realized thanks to these properties. However, fundamental understanding of organic semiconductor materials and devices is still necessary in order to obtain near-ideal performance from current and future applications. In light of this quest, this thesis presents a variety of fabrication procedures that provides better device performances or pathways to investigate unique features of organic semiconductors. The proposed methodologies rely on silicon substrates and also utilize a number of inorganic dielectric materials and metal electrodes. Combining organic and inorganic materials creates an easy-to-fabricate hybrid devices. In addition, using nanofabrication processing technologies, devices with nanostructured substrate and confined organic materials are realized. When one or more dimensions of the organic and inorganic materials measure below 100 nm and 20 nm respectively, they provide unique phenomena. For example, when silicon is confined in three-dimensions, it shows increased photoluminescence, and organic semiconductors present increased diffusion of charge carriers when confined between two electrodes.The thesis starts with introducing motivation in Chapter 1. The band structure of (organic) semiconductors and transport characteristics of organic FETs are discussed in Chapter 2. Chapter 3 explains nano-fabrication techniques used throughout the thesis. In Chapter 4, high-density arrays of crystalline silicon nanostructures are fabricated using lithography techniques of DTL and edge lithography (EL). In Chapter 5 a method based on a high-quality nanoscale template for patterning 1D organic nanostructures is introduced. Chapter 6 describes the fabrication of vertical organic field-effect transistors that has 100 nm thick P3HT nano-pillars with a surrounding gate dielectric (alumina, Al2O3) and gate electrode (aluminum, Al) around them. A unique vertical organic field-effect transistor structure in which highly doped silicon nanopillars are utilized as a gate electrode is demonstrated in Chapter 7. Lastly, Chapter 8 concludes the thesis with a useful outlook.

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DO - 10.3990/1.9789036547611

M3 - PhD Thesis - Research UT, graduation UT

SN - 978-90-365-4761-1

PB - University of Twente

CY - Enschede

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