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Efficient and bright polymer light emitting field effect transistors. (2014)
Journal Article
Ullah, M., Tandy, K., Yambem, S. D., Muhieddine, K., Ong, W. J., Shi, Z., …Namdas, E. B. (2015). Efficient and bright polymer light emitting field effect transistors. Organic Electronics, 17, 371-376. https://doi.org/10.1016/j.orgel.2014.12.014

Light emitting field effect transistors (LEFETs) are emerging as a multi-functional class of optoelectronic devices. LEFETs can simultaneously execute light emission and the standard logic functions of a transistor in a single architecture. However,... Read More about Efficient and bright polymer light emitting field effect transistors..

Micro rectennas: Brownian ratchets for thermal-energy harvesting (2014)
Journal Article
Pan, Y., Powell, C., Song, A., & Balocco, C. (2014). Micro rectennas: Brownian ratchets for thermal-energy harvesting. Applied Physics Letters, 105(25), Article 253901. https://doi.org/10.1063/1.4905089

We experimentally demonstrated the operation of a rectenna for harvesting thermal (blackbody) radiation and converting it into dc electric power. The device integrates an ultrafast rectifier, the self-switching nanodiode, with a wideband log-periodic... Read More about Micro rectennas: Brownian ratchets for thermal-energy harvesting.

Switching and memory characteristics of thin films of an ambipolar organic compound: effects of device processing and electrode materials (2014)
Journal Article
Lee, M., Pearson, C., Moon, T., Fisher, A., & Petty, M. (2014). Switching and memory characteristics of thin films of an ambipolar organic compound: effects of device processing and electrode materials. Journal of Physics D: Applied Physics, 47(48), https://doi.org/10.1088/0022-3727/47/48/485103

We report on the effects of device processing conditions, and of changing the electrode materials, on the switching and negative differential resistance (NDR) behaviour of metal/organic thin film/metal structures. The organic material was an ambipola... Read More about Switching and memory characteristics of thin films of an ambipolar organic compound: effects of device processing and electrode materials.

Composition as a Means to Control Morphology and Properties of Epoxy Based Dual-Phase Structural Electrolytes (2014)
Journal Article
Shirshova, N., Bismarck, A., Greenhalgh, E. S., Johansson, P., Kalinka, G., Marczewski, M. J., …Wienrich, M. (2014). Composition as a Means to Control Morphology and Properties of Epoxy Based Dual-Phase Structural Electrolytes. Journal of Physical Chemistry C, 118(49), 28377-28387. https://doi.org/10.1021/jp507952b

Structural electrolytes were prepared using a fully formulated commercially available high performance epoxy resin (MTM57) and an ionic liquid based electrolyte: lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) dissolved in 1-ethyl-3-methylimidazol... Read More about Composition as a Means to Control Morphology and Properties of Epoxy Based Dual-Phase Structural Electrolytes.

THz Imaging with Broadband Thermal Sources (2014)
Conference Proceeding
Balocco, C., Pan, Y., Kasjoo, S., Alimi, Y., Zhang, L., & Song, A. (2014). THz Imaging with Broadband Thermal Sources. In 2014 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 14-19 September 2014, Tucson, Arizona, USA ; proceedings (53-54). https://doi.org/10.1109/irmmw-thz.2014.6956043

We developed a THz imaging system based on a broadband thermal source (at 500°C) and an asymmetric semiconductor nanochannel, the self-switching nanodiode (SSD), as a room-temperature detector. The maximum resolution was better than 0.5 mm full width... Read More about THz Imaging with Broadband Thermal Sources.

Rectennas for Thermal-Energy Conversion (2014)
Conference Proceeding
Pan, Y., Powell, C., & Balocco, C. (2014). Rectennas for Thermal-Energy Conversion. In 2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2014). Proceedings of a meeting held 14-19 September 2014, Tucson, Arizona, USA (1-2). https://doi.org/10.1109/irmmw-thz.2014.6956198

We demonstrated the conversion of thermal energy in the form of far- and mid-infrared using a micro rectenna, consisting of a spiral antenna coupled to an ultra-fast nanodiode, the so-called self-switching device (SSD). A maximum efficiency of 0.02 %... Read More about Rectennas for Thermal-Energy Conversion.

Zinc oxide thin-film transistors fabricated at low temperature by chemical spray pyrolysis (2014)
Journal Article
Jeong, Y., Pearson, C., Lee, Y., Winchester, L., Hwang, J., Kim, H., …Petty, M. (2014). Zinc oxide thin-film transistors fabricated at low temperature by chemical spray pyrolysis. Journal of Electronic Materials, 43(11), 4241-4245. https://doi.org/10.1007/s11664-014-3342-8

We report the electrical behavior of undoped zinc oxide thin-film transistors (TFTs) fabricated by low-temperature chemical spray pyrolysis. An aerosol system utilizing aerodynamic focusing was used to deposit the ZnO. Polycrystalline films were subs... Read More about Zinc oxide thin-film transistors fabricated at low temperature by chemical spray pyrolysis.

UV-assisted low temperature oxide dielectric films for TFT applications (2014)
Journal Article
Hwang, J., Lee, K., Jeong, J., Lee, Y., Pearson, C., Petty, M., & Kim, H. (2014). UV-assisted low temperature oxide dielectric films for TFT applications. Advanced Materials Interfaces, 1(8), Article 1400206. https://doi.org/10.1002/admi.201400206

Solution-based oxide gate dielectric layers are prepared from metal nitrates using UV-assisted annealing at 150 °C. The leakage current densities of ZrO2 and Al2O3 dielectrics are less than about 10-9 A/cm2 at 1 MV/cm and comparable to those formed b... Read More about UV-assisted low temperature oxide dielectric films for TFT applications.

Density and Energy Distribution of Interface States in the Grain Boundaries of Polysilicon Nanowire (2014)
Journal Article
Amit, I., Englander, D., Horvitz, D., Sasson, Y., & Rosenwaks, Y. (2014). Density and Energy Distribution of Interface States in the Grain Boundaries of Polysilicon Nanowire. Nano Letters, 14(11), 6190-6194. https://doi.org/10.1021/nl5024468

Wafer-scale fabrication of semiconductor nanowire devices is readily facilitated by lithography-based top-down fabrication of polysilicon nanowire (P-SiNW) arrays. However, free carrier trapping at the grain boundaries of polycrystalline materials dr... Read More about Density and Energy Distribution of Interface States in the Grain Boundaries of Polysilicon Nanowire.

Mechanical, electrical and microstructural characterisation of multifunctional structural power composites (2014)
Journal Article
Greenhalgh, E., Ankersen, J., Asp, L., Bismarck, A., Fontana, Q., Houlle, M., …Wienrich, M. (2015). Mechanical, electrical and microstructural characterisation of multifunctional structural power composites. Journal of Composite Materials, 49(15), 1823-1834. https://doi.org/10.1177/0021998314554125

Multifunctional composites which can fulfil more than one role within a system have attracted considerable interest. This work focusses on structural supercapacitors which simultaneously carry mechanical load whilst storing/delivering electrical ener... Read More about Mechanical, electrical and microstructural characterisation of multifunctional structural power composites.

High-Performance, Solution-Processed Non-polymeric Organic Photodiodes (2014)
Journal Article
Kim, I. K., Pal, B. N., Ullah, M., Burn, P. L., Lo, S., Meredith, P., & Namdas, E. B. (2015). High-Performance, Solution-Processed Non-polymeric Organic Photodiodes. Advanced Optical Materials, 3(1), 50-56. https://doi.org/10.1002/adom.201400385

High-performance, solution-processed, non-polymeric broadband organic photo­diodes (OPDs) with a dark current density of 0.11 nA cm-2, responsivity of 0.4 A W-1, and detectivity of up to 9.2 × 1012 Jones are demonstrated.

High-Mobility, Heterostructure Light-Emitting Transistors and Complementary Inverters (2014)
Journal Article
Ullah, M., Tandy, K., Li, J., Shi, Z., Burn, P. L., Meredith, P., & Namdas, E. B. (2014). High-Mobility, Heterostructure Light-Emitting Transistors and Complementary Inverters. ACS Photonics, 1(10), 954-959. https://doi.org/10.1021/ph500300n

Light-emitting field effect transistors (LEFETs) are optoelectronic devices that can simultaneously execute light emission and the standard logic functions of a transistor in a single device architecture. In this article, we show that ambipolar LEFET... Read More about High-Mobility, Heterostructure Light-Emitting Transistors and Complementary Inverters.

Evolution-in-materio: solving function optimization problems using materials (2014)
Conference Proceeding
Mohid, M., Miller, J., Harding, S., Tufte, G., Lykkebo, O., Massey, M., & Petty, M. (2014). Evolution-in-materio: solving function optimization problems using materials. In Computational Intelligence (UKCI) : 2014 14th UK Workshop on, 8-10 September 2014, Bradford, UK ; proceedings (1-8). https://doi.org/10.1109/ukci.2014.6930152

Evolution-in-materio (EIM) is a method that uses artificial evolution to exploit properties of materials to solve computational problems without requiring a detailed understanding of such properties. In this paper, we show that using a purpose-built... Read More about Evolution-in-materio: solving function optimization problems using materials.

Logic gate and circuit training on randomly dispersed carbon nanotubes (2014)
Journal Article
Kotsialos, A., Massey, M., Qaiser, F., Zeze, D., Pearson, C., & Petty, M. (2014). Logic gate and circuit training on randomly dispersed carbon nanotubes. International Journal of Unconventional Computing, 10(5-6), 473-497

This paper presents results of computations based on threshold logic performed by a thin solid film, following the general principle of evolution in materio. The electrical conductivity is used as the physical property manipulated for evolving Boolea... Read More about Logic gate and circuit training on randomly dispersed carbon nanotubes.

Effects of hydrogen plasma treatment on the electrical behavior of solution-processed ZnO transistors (2014)
Journal Article
Jeong, Y., Pearson, C., Lee, Y., Ahn, K., Cho, C., Hwang, J., …Petty, M. (2014). Effects of hydrogen plasma treatment on the electrical behavior of solution-processed ZnO transistors. Journal of Applied Physics, 116(7), Article 074509. https://doi.org/10.1063/1.4893470

The effects of hydrogen plasma treatment on the active layer of top-contact zinc oxide thin film transistors are reported. The transfer characteristics of the reference devices exhibited large hysteresis effects and an increasing positive threshold v... Read More about Effects of hydrogen plasma treatment on the electrical behavior of solution-processed ZnO transistors.