Applications of silver nanowire networks in opto-electronic devices

Download
2018
Coşkun, Şahin
The demand for electronic devices such as smart phones, touch screens and flat panel televisions has been increased over the past decade. These devices need transparent conductors and the most widely used transparent conductor as electrode in these devices is indium tin oxide (ITO) due to its high transparency and low sheet resistance. However, ITO thin films have some drawbacks. They are expensive, difficult to deposit, poorly compatible with flexible substrates. Hence, better alternatives for transparent conductors are being studied. Recently, metal nanowires have received a lot of attention due to their unique physical, chemical and optical properties. Due to excellent properties of bulk silver, silver nanowires have been widely investigated. Recently, it was proved that silver nanowire networks provide a suitable path for charge transport and transmit incident visible light. In this thesis, silver nanowires were synthesized in a larger scale via modified polyol process. Afterwards, as synthesized silver nanowires in the form of networks were used to fabricate transparent and conducting electrodes. This was followed by the use of silver nanowire network based transparent and conducting electrodes were used as anodes in organic light emitting diodes (OLEDs). Finally, ambient stability of silver nanowire networks and fabrication of NiO / Ag NWs nanocomposite electrodes were investigated

Suggestions

Nanocrystal silicon based visible light emitting pin diodes
Anutgan, Mustafa; Katırcıoğlu, Bayram; Department of Physics (2010)
The production of low cost, large area display systems requires a light emitting material compatible with the standard silicon (Si) based complementary metal oxide semiconductor (CMOS) technology. The crystalline bulk Si is an indirect band semiconductor with very poor optical properties. On the other hand, hydrogenated amorphous Si (a-Si:H) based wide gap alloys exhibit strong visible photoluminescence (PL) at room temperature, owing to the release of the momentum conservation law. Still, the electrolumine...
Energy-Aware Data Delivery Framework for Safety-Oriented Mobile IoT
Al-Turjman, Fadi (2018-01-01)
The proliferation of wireless multimedia sensor networks has given rise to intelligent transportation systems as a mobile data-sharing model. This vision can be extended under the umbrella of the mobile Internet of Things to include versatile resources, such as smartphones, radio frequency identification tags, and sensors on roads that can be utilized in emergency situations. The facilitation of such a vision faces key challenges in terms of interoperability, resource management and energy consumption. In t...
Simulation and performance evaluation of a fast and high power pulsed laser diode driver for laser range finder
Altınok, Yahya Kemal; Erkmen, İsmet; Department of Electrical and Electronics Engineering (2012)
Laser Diodes (LDs) are semiconductor coherent lightening devices which are widely used in many fields such as defence, industry, medical and optical communications. They have advantageous characteristics such as having higher electrical-to-optical and optical-to-optical conversion efficiencies from pump source to useful output power when compared to flash lamps, which makes them the best devices to be used in range finding applications. Optical output power of lasers depends on current through LDs. Therefor...
Effective Use of Low Power Heterogeneous Wireless Multimedia Sensor Networks for Surveillance Applications Using IEEE 802.15.4 Protocol
Kenges, Nurdaulet; Ever, Enver; Yazıcı, Adnan (2021-01-01)
With the recent technological advancements in video sensors, digital signal processing units and digital radio interfaces, low-cost devices such as Wireless Multimedia Sensor Networks (WMSNs) became an important part of surveillance applications. The scarcity of resources for these devices introduces new challenges in terms of energy consumption, and Quality of Service (QoS) guarantees. One of the challenges is processing and transmission of large volumes of multimedia data. In this paper, the efficiency of...
Data Delivery in Wireless Multimedia Sensor Networks: Challenging and Defying in the IoT Era
Al-Turjman, Fadi; Radwan, Ayman (2017-10-01)
The vision of wireless multimedia sensor networks (WMSNs) nowadays is to afford real-time multimedia applications using the pervasive wireless sensors around us. This necessitates strict QoS conditions, which have led to new emerging challenges in terms of data delivery in the Internet of Things era. Accordingly, multipath routing protocols with multi-constraints are recommended in WMSNs. In this article, a comprehensive overview of both best effort and real-time multipath routing protocols for WMSNs is per...
Citation Formats
Ş. Coşkun, “Applications of silver nanowire networks in opto-electronic devices,” Ph.D. - Doctoral Program, Middle East Technical University, 2018.