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Lyotropic ‘hairy’ TiO2 nanorods (2018)
Journal Article
Cheng, F., Verrelli, E., Alharthi, F. A., Kelly, S. M., O'Neill, M., Kemp, N. T., …Anthopoulos, T. (2019). Lyotropic ‘hairy’ TiO2 nanorods. Nanoscale advances, 1, 254-264. doi:10.1039/c8na00054a

We report the synthesis of the first stable, solution-processable and photocrosslinkable hybrid organic/inorganic titanium dioxide nanorods as ‘hairy rods’ coated with phosphonate ligands with photoreactive coumarin groups located in a terminal posit... Read More

Solution-processed bilayer photovoltaic devices with nematic liquid crystals (2013)
Journal Article
AlKhalifah, M. S., Lei, C., Myers, S. A., O’Neill, M., Kitney, S. P., & Kelly, S. M. (2014). Solution-processed bilayer photovoltaic devices with nematic liquid crystals. Liquid crystals, 41(3), (402-417). doi:10.1080/02678292.2013.834082. ISSN 0267-8292

The cross-linking of polymerisable liquid crystalline semiconductors is a promising approach to solution-processable, multilayer, organic photovoltaics. Here we demonstrate an organic bilayer photovoltaic with an insoluble electron-donating layer for... Read More

Liquid crystalline organic semiconductors: nematic spiro[cyclopentyl-1,9']fluorenes (2011)
Journal Article
Kitney, S. P., Billa, M. R., Kassireddy, K., Haro, M., Al-Kalifah, M. S., Kelly, S. M., …Kelly, S. (2011). Liquid crystalline organic semiconductors: nematic spiro[cyclopentyl-1,9']fluorenes. Liquid crystals, 38(7), (813-829). doi:10.1080/02678292.2011.577913. ISSN 0267-8292

A number of nematic spiro[cyclopentyl-1,9′]fluorene reactive mesogens with polymerisable oxetane or non-conjugated diene end-groups have been successfully synthesised. The melting and clearing points of these new spiro[cyclopentyl-1,9′]fluorenes are... Read More

Ordered materials for organic electronics and photonics (2010)
Journal Article
O’Neill, M., Kelly, S. M., O'Neill, M., & Kelly, S. (2011). Ordered materials for organic electronics and photonics. Advanced materials, 23(5), (566-584). doi:10.1002/adma.201002884. ISSN 0935-9648

We present a critical review of semiconducting/light emitting, liquid crystalline materials and their use in electronic and photonic devices such as transistors, photovoltaics, OLEDs and lasers. We report that annealing from the mesophase improves th... Read More

Carbazole nematic liquid crystals (2010)
Journal Article
Bao, W., Billa, M. R., Kassireddy, K., Haro, M., Kelly, M. J., Kitney, S. P., …Kelly, S. M. (2010). Carbazole nematic liquid crystals. Liquid crystals, 37(10), (1289-1303). doi:10.1080/02678292.2010.504862. ISSN 0267-8292

A number of calamitic 2,7-diary-N-alkyl-substituted carbazoles with an enantiotropic nematic phase have been prepared. Branching of the aliphatic chain attached to the nitrogen atom in the carbazole ring leads to significantly lower liquid crystal tr... Read More

Optical properties of light-emitting nematic liquid crystals: A joint experimental and theoretical study (2010)
Journal Article
Cornil, J., Cornil, J., O’Neill, M., O'Neill, M., Liedtke, A., Kelly, S. M., …Cornil, J. (2010). Optical properties of light-emitting nematic liquid crystals: A joint experimental and theoretical study. Journal of Physical Chemistry B, 114(37), 11975-11982. doi:10.1021/jp104280w

Semiempirical quantum-chemical calculations are used to simulate the optical properties of a series of green light-emitting nematic liquid crystals containing fluorene, thiophene, or thienothiophene groups with solid-state photoluminescence quantum e... Read More

One-step photoembossing for submicrometer surface relief structures in liquid crystal semiconductors (2010)
Journal Article
Liedtke, A., Lei, C., O’Neill, M., Dyer, P. E., Kitney, S. P., & Kelly, S. M. (2010). One-step photoembossing for submicrometer surface relief structures in liquid crystal semiconductors. ACS Nano, 4(6), 3248-3253. doi:10.1021/nn100012g

We report a new single-step method to directly imprint nanometer-scale structures on photoreactive organic semiconductors. A surface relief grating is spontaneously formed when a light-emitting, liquid crystalline, and semiconducting thin film is irr... Read More

Grazing incidence X-ray diffraction of a photoaligned nematic semiconductor (2009)
Journal Article
Dröge, S., Khalifah, M. S. A., O'Neill, M., Thomas, H. E., Simmonds, H. S., Macdonald, J. E., …Kelly, S. M. (2009). Grazing incidence X-ray diffraction of a photoaligned nematic semiconductor. Journal of Physical Chemistry B, 113(1), (49-53). doi:10.1021/jp803379a. ISSN 1520-6106

Grazing incidence X-ray diffraction is used to find the thin film morphology of an extended molecule with an irregular alternating fluorene - thiophene structure, which is used to obtain linearly polarized electroluminescence and the photovoltaic eff... Read More

A new approach to photoalignment: photo-addition to a self-assembled monolayer (2008)
Journal Article
Dröge, S., O'Neill, M., Löbbert, A., Kitney, S. P., Kelly, S. M., Wei, P., & Dong, D. (2009). A new approach to photoalignment: photo-addition to a self-assembled monolayer. Journal of materials chemistry, 19(2), (274-279). doi:10.1039/b812226a. ISSN 0959-9428

Photoalignment used to control the orientation of nematic liquid crystals in LCDs usually involves the photochemical modification of the chemical structure of an organic thin film so that an optical and/or steric anisotropy is developed. We now demon... Read More

White-light OLEDs using liquid crystal polymer networks (2008)
Journal Article
Wertmoeller, A., Wertmöller, A., O’Neill, M., Liedtke, A., O'Neill, M., Wertmoller, A., …Kelly, S. M. (2008). White-light OLEDs using liquid crystal polymer networks. Chemistry of materials : a publication of the American Chemical Society, 20(11), 3579-3586. doi:10.1021/cm702925f

We have mixed nematic light-emitting liquid crystals and incorporated them as insoluble cross-linked polymer networks in a liquid crystal white-light organic light-emitting diode (LC-WOLED). The light emission is not voltage-dependent and polarized w... Read More

Calamatic liquid crystal blends for organic photovoltaics
Presentation / Conference
Kelly, S. M., Vlachos, P., Aldred, M. P., Al Khalifah, M. S., Lei, C., O'Neill, M., …Kelly, S. Calamatic liquid crystal blends for organic photovoltaics. Paper presented at Organic Photovoltaics IX

Four different perylene-based electron-acceptors having similar electron affinities, but different thermotropic phases are blended with nematic liquid crystalline electron-donors with a fluorene-thiophene structure to form single layer photovoltaic d... Read More

Photopolymerization studies of a light-emitting liquid crystal with methacrylate reactive groups for electroluminescence
Presentation / Conference
Bruneau, A., Vlachos, P., Aldred, M. P., Liedtke, A., Woon, K. L., O'Neill, M., …Kelly, S. M. Photopolymerization studies of a light-emitting liquid crystal with methacrylate reactive groups for electroluminescence. Paper presented at Liquid Crystals XII

Light-emitting reactive mesogens are promising materials for photolithographically processable organic light-emitting diodes (OLEDs). We study the photopolymerization of a fluorene-based mesogen with methacrylate photoreactive groups. We find that th... Read More