Interface‐tailored and nanoengineered polymeric materials for (opto)electronic devices

Ma, Hong; Liu, Michelle S.; Jen, Alex K.‐Y.

doi:10.1002/pi.2572

Cited by 27 publications

(22 citation statements)

References 194 publications

(216 reference statements)

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“…There is a keen interest in these areas to create one-dimensional nanoscale metal and metal oxide electrode structures that provide tunability of the electrodeorganic interfaces, high surface area, and low tortuosity for improved electron/hole transport characteristics [14,15]. Tailored nanoscale active layer interfaces enable optimization of exciton generation and dissociation along with selective charge transport, while nanoscale electrodes can assist in charge collection for electron and hole rich regions [16]. The increased surface area also allows for easy access to analytes, as well as direct paths for charge collection and electrical transport both of which are key aspects for many electrochemical applications.…”

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confidence: 99%

Fabrication, electrical and optical properties of silver, indium tin oxide (ITO), and indium zinc oxide (IZO) nanostructure arrays

Khosroabadi

Gangopadhyay

Duong

et al. 2013

Physica Status Solidi (a)

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In thin film devices such as light-emitting diodes, photovoltaic cells and field-effect transistors, the processes of charge injection, charge transport, charge recombination, separation and collection are critical to performance. Most of these processes are relevant to nanoscale metal and metal oxide electrode-organic material interfacial phenomena. In this report we present a unique method for creating tailored onedimensional nanostructured silver, tin and/or zinc substituted indium oxide electrode structures over large areas. The method allows production of high aspect ratio nanoscale structures with feature sizes below 100 nm and a large range of dimensional tunability. We observed that both the electronic and optical properties of these electrodes are closely correlated to the nanostructure dimensions and can be easily tuned by control of the feature size. Surface area enhancement accurately describes the conductivity studies, while nanostructure dependent optical properties highlight the quasi-plasmonic nature of the electrodes. Optimization of the nanostructured electrode transparency and conductivity for specific opto-electronic systems is expected to provide improvement in device performance.

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confidence: 99%

Fabrication, electrical and optical properties of silver, indium tin oxide (ITO), and indium zinc oxide (IZO) nanostructure arrays

Khosroabadi

Gangopadhyay

Duong

et al. 2013

Physica Status Solidi (a)

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“…[1][2][3][4] Poly(3-hexylthiophene) (P3HT) is a conjugated polymer which has received considerable attention because of its good electrical and optical characteristic when used as a semi-conducting material in OFETs. [5][6][7][8] The use of this polymer also enables simple, low-cost processing because it is soluble and conducting.…”

Section: Introductionmentioning

confidence: 99%

The Molecular Structures of Poly(3-hexylthiophene) Films Determine the Contact Properties at the Electrode/Semiconductor Interface

Park¹

2014

Bulletin of the Korean Chemical Society

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The contact properties between gold and poly(3-hexylthiophene) (P3HT) films having either of two distinct molecular orientations and orderings were investigated. Thermal treatment increased the molecular ordering of P3HT and remarkably reduced the contact resistance at the electrode/semiconductor interface, which enhanced the electrical performance. This phenomenon was understood in terms of a small degree of metal penetration into the P3HT film as a result of the thermal treatment, which formed a sharp interface at the contact interface between the gold electrode and the organic semiconductor.

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“…Metal and metal oxide electrodes play a significant role in many state-of-the-art technologies including photonics [1], membranes [2], biological supports [3], sensing [4], electrochromics [5], and in various green technologies, such as, photocatalytics [6], Li-ion batteries [7] and photovoltaics [8]. There is strong on-going effort in these areas to create one-and twodimensional electrode structures that provide tunability in key electrode properties.…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Nanostructured Electrodes

et al. 2013

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A versatile and powerful new lithographic fabrication method has been used to fabricate a number of nano-architectured ordered 2-D indium tin oxide (ITO) and silver (Ag) electrodes. By careful tuning of the dimensions of the nanofeatures in the electrodes, the surface area can be enhanced as desired, in-turn changing resistivity and free carrier concentrations accordingly. Absorption spectra of the samples show the existence of a new optical bandgap, in addition to the bulk bandgap, that is smaller. Nanostructured electrodes show enhanced transparency compared to their planar counterparts and demonstrate typical surface plasmon characteristics. The resonance frequency can be tuned as well by changing the dimensions of the nanofeatures in the electrodes. INTRODUCTIONMetal and metal oxide electrodes play a significant role in many state-of-the-art technologies including photonics [1], membranes [2], biological supports [3], sensing [4], electrochromics [5], and in various green technologies, such as, photocatalytics [6], Li-ion batteries [7] and photovoltaics [8]. There is strong on-going effort in these areas to create one-and twodimensional electrode structures that provide tunability in key electrode properties. Tailored nanostructured interfaces enable modification and tunability of the optical transparency, band gap, carrier concentration and mobility, and low tortuosity for improved electrode -hole transport characteristics. Organic photovoltaics (OPVs) suffer from low hole mobility and Hsu et al [9] have showed that insertion of nanostructured ITO in the active layer of organic solar cells may act to balance the carrier transport. Nanostructured ITO will increase the effective mobility of holes by creating a shorter path for the holes to reach the anode. Tailored active layer electrode interfaces can also enable optimization of exciton generation and dissociation within the space -charge uncertainty limits along with selective charge transport, possibly improving charge collection from both electron and hole rich regions. Enhanced surface area in nanostructured ITO also enables easy access to analytes in electrochemical sensors and other applications. Further advantages can include improved light harvesting efficiency in OPVs using these structures, along with enhanced mechanical stability and shorter radial diffusion distances [10]. The existence of void volume in the pillar arrays reduces the effective refractive index of the electrode and hence can be useful for antireflection coatings [11,12] These structures are fabricated using a modified imprinting process [13], resulting in a thermoplastic nanostructured scaffold that can be subsequently coated with a wide variety of metal and metal oxides using traditional deposition techniques. Such a process allows facile integration with existing TCO and device manufacturing methodologies, lower operating and start-up materials cost and providing the potential for high throughput manufacturing, including roll-to-roll production. The dimensions and distribution of...

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Interface‐tailored and nanoengineered polymeric materials for (opto)electronic devices

Cited by 27 publications

References 194 publications

Fabrication, electrical and optical properties of silver, indium tin oxide (ITO), and indium zinc oxide (IZO) nanostructure arrays

Fabrication, electrical and optical properties of silver, indium tin oxide (ITO), and indium zinc oxide (IZO) nanostructure arrays

The Molecular Structures of Poly(3-hexylthiophene) Films Determine the Contact Properties at the Electrode/Semiconductor Interface

Optical Properties of Nanostructured Electrodes

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