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Measurement of interchain and intrachain exciton hopping barriers in luminescent polymer (2011)
Journal Article
Santos, P., Costa, B., Araujo, K., Cury, L., Snedden, E., Bourdakos, K., …Monkman, A. (2011). Measurement of interchain and intrachain exciton hopping barriers in luminescent polymer. Journal of Physics: Condensed Matter, 24(1), https://doi.org/10.1088/0953-8984/24/1/015801

The integrated photoluminescence intensity in thin films of 'Super Yellow' copolymer has been analyzed using a Mott-like temperature dependence. This has enabled us to observe contributions from two emission channels, indicative of exciton recombinat... Read More about Measurement of interchain and intrachain exciton hopping barriers in luminescent polymer.

Wavelength-dependent frustrated internal reflection via photonic interface states (2011)
Journal Article
Cross, G., & Brand, S. (2011). Wavelength-dependent frustrated internal reflection via photonic interface states. Applied Physics Letters, 99(19), Article 191106. https://doi.org/10.1063/1.3660266

Conventional frustrated internal reflection in which light is able to tunnel across a small air gap between two prisms is a well known phenomenon. In this work, an experimental proof-of-concept demonstration of a polarization and highly wavelength se... Read More about Wavelength-dependent frustrated internal reflection via photonic interface states.

Micro-machined fluidic devices for terahertz time-domain spectroscopy (2011)
Journal Article
Baragwanath, A., Swift, G., DeChang, D., Zeze, D., Gallant, A., & Chamberlain, J. (2011). Micro-machined fluidic devices for terahertz time-domain spectroscopy. Physica status solidi. C, Current topics in solid state physics (Internet), 8(9), 2935-2937. https://doi.org/10.1002/pssc.201084088

Here we present a silicon based, micro-machined fluidic device for terahertz frequencies, fabricated using standard lithographic and micro-machining processes in a cleanroom environment. Designed for use in a conventional transmission terahertz time-... Read More about Micro-machined fluidic devices for terahertz time-domain spectroscopy.

Bipolar Molecules with High Triplet Energies: Synthesis, Photophysical, and Structural Properties. (2011)
Journal Article
Zheng, Y., Batsanov, A., Jankus, V., Dias, F., Bryce, M., & Monkman, A. (2011). Bipolar Molecules with High Triplet Energies: Synthesis, Photophysical, and Structural Properties. Journal of Organic Chemistry, 76(20), 8300-8310. https://doi.org/10.1021/jo201488v

This article sheds new light on the interplay of electronic and conformational effects in luminescent bipolar molecules. A series of carbazole/1,3,4-oxadiazole hybrid molecules is described in which the optoelectronic properties are systematically va... Read More about Bipolar Molecules with High Triplet Energies: Synthesis, Photophysical, and Structural Properties..

Thermal slip sources at the extremity and bevel edge of silicon wafers (2011)
Journal Article
Tanner, B., Wittge, J., Allen, D., Fossati, M., Danilwesky, A., McNally, P., …Jacques, D. (2011). Thermal slip sources at the extremity and bevel edge of silicon wafers. Journal of Applied Crystallography, 44(3), 489-494. https://doi.org/10.1107/s0021889811012088

High-resolution X-ray diffraction imaging of 200 mm silicon wafers following rapid thermal annealing at a temperature of 1270 K has revealed the presence of many early stage sources of thermal slip associated with the wafer edge. Dislocation sources... Read More about Thermal slip sources at the extremity and bevel edge of silicon wafers.

Highly Efficient, Solution-Processed, Single-Layer, Electrophosphorescent Diodes and the Effect of Molecular Dipole Moment (2011)
Journal Article
Al-Attar, H., Griffiths, G., Moore, T., Tavasli, M., Fox, M., Bryce, M., & Monkman, A. (2011). Highly Efficient, Solution-Processed, Single-Layer, Electrophosphorescent Diodes and the Effect of Molecular Dipole Moment. Advanced Functional Materials, 21(12), 2376-2382. https://doi.org/10.1002/adfm.201100324

A new family of highly soluble electrophosphorescent dopants based on a series of tris-cyclometalated iridium(III) complexes (1-4) of 2-(carbazol-3-yl)-4/5-R-pyridine ligands with varying molecular dipole strengths have been synthesized. Highly effic... Read More about Highly Efficient, Solution-Processed, Single-Layer, Electrophosphorescent Diodes and the Effect of Molecular Dipole Moment.

The contribution of triplet-triplet annihilation to the lifetime and efficiency of fluorescent polymer organic light emitting diodes (2011)
Journal Article
King, S., Cass, M., Pintani, M., Coward, C., Dias, F., Monkman, A., & Roberts, M. (2011). The contribution of triplet-triplet annihilation to the lifetime and efficiency of fluorescent polymer organic light emitting diodes. Journal of Applied Physics, 109(7), Article 074502. https://doi.org/10.1063/1.3561430

We demonstrate that the fast initial decay of a prototypical fluorescent polymer based organic light emitting diode device is related to the contribution that triplet-triplet annihilation makes to the device efficiency. We show that, during typical o... Read More about The contribution of triplet-triplet annihilation to the lifetime and efficiency of fluorescent polymer organic light emitting diodes.

Solution processed multilayer polymer light-emitting diodes based on different molecular weight host (2011)
Journal Article
Al-Attar, H., & Monkman, A. (2011). Solution processed multilayer polymer light-emitting diodes based on different molecular weight host. Journal of Applied Physics, 109(7), Article 074516. https://doi.org/10.1063/1.3569831

Solution processed multilayer polymer light-emitting diodes (PLEDs) based on different molecular weight host have been investigated. A PLED based on high molecular weight poly (vinyl carbazole) PVKH and low molecular weight poly (vinyl carbazole) PVK... Read More about Solution processed multilayer polymer light-emitting diodes based on different molecular weight host.

Long range energy transfer in conjugated polymer sequential bilayers (2011)
Journal Article
Cury, L., Bourdakos, K., Dai, D., Dias, F., & Monkman, A. (2011). Long range energy transfer in conjugated polymer sequential bilayers. The Journal of Chemical Physics, 134(10), Article 104903. https://doi.org/10.1063/1.3560164

Steady-state and time-resolved photoluminescence have been used to investigate the optical properties of bilayer and blend films made from poly(9,9-dioctyl-fluorene-2,7-diyl) (PFO) and poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH PP... Read More about Long range energy transfer in conjugated polymer sequential bilayers.