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2019

How transport layer properties affect perovskite solar cell performance: Insights from a coupled charge transport/ion migration model

Courtier, N. E., Cave, J. M., Foster, J. M., Walker, A. B. & Richardson, G., 1 Jan 2019, In : Energy and Environmental Science. 12, 1, p. 396-409 14 p.

Research output: Contribution to journalArticle

Open Access
25 Citations (Scopus)

IonMonger: a free and fast planar perovskite solar cell simulator with coupled ion vacancy and charge carrier dynamics

Courtier, N. E., Cave, J. M., Walker, A. B., Richardson, G. & Foster, J. M., 1 Dec 2019, In : Journal of Computational Electronics. 18, 4, p. 1435-1449 15 p.

Research output: Contribution to journalArticle

Open Access

Partial cation substitution reduces iodide ion transport in lead iodide perovskite solar cells

Ferdani, D., Pering, S., Ghosh, D., Kubiak, P., Walker, A., Lewis, S., Johnson, A., Baker, P., Islam, M. & Cameron, P., 15 May 2019, In : Energy & Environmental Science. 12, 7, p. 2264-2272 9 p.

Research output: Contribution to journalArticle

Open Access
6 Citations (Scopus)

Putting the Squeeze on Lead Iodide Perovskites: Pressure-Induced Effects to Tune Their Structural and Optoelectronic Behavior

Ghosh, D., Aziz, A., Dawson, J. A., Walker, A. B. & Islam, M. S., 11 Jun 2019, In : Chemistry of Materials. 31, 11, p. 4063-4071 9 p.

Research output: Contribution to journalArticle

Open Access
6 Citations (Scopus)

Salt bridge impact on global rigidity and thermostability in thermophilic citrate synthase

McManus, T. J., Wells, S. A. & Walker, A. B., 8 Nov 2019, In : Physical Biology. 17, 1, p. 1-9 10 p., 016002.

Research output: Contribution to journalArticle

Simulating morphologies of organic semiconductors by exploiting low-frequency vibrational modes

Smith, A. R., Thompson, I. R. & Walker, A. B., 28 Apr 2019, In : Journal of Chemical Physics. 150, 16, 164115.

Research output: Contribution to journalArticle

Open Access
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1 Citation (Scopus)
14 Downloads (Pure)
2018

Lead-Free Perovskite Semiconductors Based on Germanium-Tin Solid Solutions: Structural and Optoelectronic Properties

Nagane, S., Ghosh, D., Hoye, R. L. Z., Zhao, B., Ahmad, S., Walker, A. B., Saiful Islam, M., Ogale, S. & Sadhanala, A., 22 Mar 2018, In : Journal of Physical Chemistry C. 122, 11, p. 5940-5947 8 p.

Research output: Contribution to journalArticle

Open Access
File
20 Citations (Scopus)
79 Downloads (Pure)

Microscopic origins of charge transport in triphenylene systems

Thompson, I. R., Coe, M. K., Walker, A. B., Ricci, M., Roscioni, O. M. & Zannoni, C., 5 Jun 2018, In : Physical Review Materials. 2, 6, 12 p., 064601.

Research output: Contribution to journalArticle

Open Access
File
3 Citations (Scopus)
43 Downloads (Pure)
Open Access
File
16 Citations (Scopus)
15 Downloads (Pure)

On the importance of detailed structure in molecular electronics (and why microscopic models cannot see the wood for trees)

Thompson, I. R., Coe, M. K., Walker, A. B., Ricci, M., Roscioni, O. M. & Zannoni, C., 8 Dec 2018, In : Liquid Crystals. 45, 13-15, p. 2086-2096 11 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

The Role of Surface Recombination on the Performance of Perovskite Solar Cells: Effect of Morphology and Crystalline Phase of TiO2 Contact

Idígoras, J., Contreras-Bernal, L., Cave, J. M., Courtier, N. E., Barranco, Á., Borras, A., Sánchez-Valencia, J. R., Anta, J. A. & Walker, A. B., 9 Nov 2018, In : Advanced Materials Interfaces. 5, 21, 1801076.

Research output: Contribution to journalArticle

Open Access
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8 Citations (Scopus)
8 Downloads (Pure)
2017

Azetidinium lead iodide for perovskite solar cells

Pering, S. R., Deng, W., Troughton, J. R., Kubiak, P. S., Ghosh, D., Niemann, R. G., Brivio, F., Jeffrey, F. E., Walker, A. B., Islam, M. S., Watson, T. M., Raithby, P. R., Johnson, A. L., Lewis, S. E. & Cameron, P. J., 21 Oct 2017, In : Journal of Materials Chemistry A. 5, 39, p. 20658-20665 8 p.

Research output: Contribution to journalArticle

Open Access
File
16 Citations (Scopus)
89 Downloads (Pure)

Good Vibrations: Locking of Octahedral Tilting in Mixed-Cation Iodide Perovskites for Solar Cells

Ghosh, D., Walsh Atkins, P., Islam, M. S., Walker, A. B. & Eames, C., 13 Oct 2017, In : ACS Energy Letters. 2, 10, p. 2424-2429 6 p.

Research output: Contribution to journalArticle

Open Access
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34 Citations (Scopus)
27 Downloads (Pure)

Measurement and modelling of dark current decay transients in perovskite solar cells

O'Kane, S. E. J., Richardson, G., Pockett, A., Niemann, R. G., Cave, J. M., Sakai, N., Eperon, G. E., Snaith, H. J., Foster, J. M., Cameron, P. J. & Walker, A. B., 14 Jan 2017, In : Journal of Materials Chemistry C. 2017, 5, p. 452-462

Research output: Contribution to journalArticle

Open Access
File
23 Citations (Scopus)
111 Downloads (Pure)
2016

Can slow-moving ions explain hysteresis in the current–voltage curves of perovskite solar cells?

Richardson, G., O'Kane, S., Niemann, R., Peltola, T., Foster, J., Cameron, P. & Walker, A., 1 Apr 2016, In : Energy & Environmental Science. 9, 4, p. 1476-1485 10 p.

Research output: Contribution to journalArticle

Open Access
192 Citations (Scopus)
12 Downloads (Pure)

Utilizing energy transfer in binary and ternary bulk heterojunction organic solar cells

Feron, K., Cave, J. M., Thameel, M. N., O'Sullivan, C., Kroon, R., Andersson, M. R., Zhou, X., Fell, C. J., Belcher, W. J., Walker, A. B. & Dastoor, P. C., 17 Aug 2016, In : ACS Applied Materials and Interfaces. 8, 32, p. 20928-20937 10 p.

Research output: Contribution to journalArticle

Open Access
File
13 Citations (Scopus)
237 Downloads (Pure)

Why you should get ready to say goodbye to the humble lightbulb

Walker, A., 13 Jun 2016, The Conversation.

Research output: Contribution to specialist publicationArticle

2015
Open Access
224 Citations (Scopus)
34 Downloads (Pure)
2014

Influence of ionizing dopants on charge transport in organic semiconductors

Abate, A., Staff, D. R., Hollman, D. J., Snaith, H. J. & Walker, A. B., 1 Jan 2014, In : Physical Chemistry Chemical Physics . 16, 3, p. 1132-1138 7 p.

Research output: Contribution to journalArticle

42 Citations (Scopus)

Understanding the role of ultra-thin polymeric interlayers in improving efficiency of polymer light emitting diodes

Bailey, J., Wright, E. N., Wang, X., Walker, A. B., Bradley, D. D. C. & Kim, J-S., 28 May 2014, In : Journal of Applied Physics. 115, 20, p. 1 - 12 12 p., 204508.

Research output: Contribution to journalArticle

Open Access
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14 Citations (Scopus)
146 Downloads (Pure)
2013

Structural and electronic properties of hybrid perovskites for high-efficiency thin-film photovoltaics from first-principles

Brivio, F., Walker, A. B. & Walsh, A., Oct 2013, In : APL Materials. 1, 4, 042111.

Research output: Contribution to journalArticle

Open Access
File
363 Citations (Scopus)
136 Downloads (Pure)
2012

In situ detection of free and trapped electrons in dye-sensitized solar cells by photo-induced microwave reflectance measurements

Dunn, H. K., Peter, L. M., Bingham, S. J., Maluta, E. & Walker, A. B., 18 Oct 2012, In : Journal of Physical Chemistry C. 116, 41, p. 22063-22072 10 p.

Research output: Contribution to journalArticle

Open Access
File
16 Citations (Scopus)
131 Downloads (Pure)

Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device characteristics

Kimber, R. G. E., Wright, E. N., O'Kane, S. E. J., Walker, A. B. & Blakesley, J. C., 26 Dec 2012, In : Physical Review B. 86, 23, 235206.

Research output: Contribution to journalArticle

Open Access
File
51 Citations (Scopus)
140 Downloads (Pure)
2011

Determination of the electron diffusion length in dye-sensitized solar cells by substrate contact patterning

Dunn, H. K., Westin, P-O., Staff, D. R., Peter, L. M., Walker, A. B., Boschloo, G. & Hagfeldt, A., 21 Jul 2011, In : Journal of Physical Chemistry C. 115, 28, p. 13932-13937 6 p.

Research output: Contribution to journalArticle

Open Access
File
13 Citations (Scopus)
124 Downloads (Pure)

Does supramolecular ordering influence exciton transport in conjugated systems? Insight from atomistic simulations

Papadopoulos, T. A., Muccioli, L., Athanasopoulos, S., Walker, A. B., Zannoni, C. & Beljonne, D., Jun 2011, In : Chemical Science. 2, 6, p. 1025-1032 8 p.

Research output: Contribution to journalArticle

Open Access
File
25 Citations (Scopus)
206 Downloads (Pure)

Real-time optical waveguide measurements of dye adsorption into nanocrystalline TiO2 films with relevance to dye-sensitized solar cells

Peic, A., Staff, D., Risbridger, T., Menges, B., Peter, L. M., Walker, A. B. & Cameron, P. J., 27 Jan 2011, In : Journal of Physical Chemistry C. 115, 3, p. 613-619 7 p.

Research output: Contribution to journalArticle

19 Citations (Scopus)
2010

Bicontinuous minimal surface nanostructures for polymer blend solar cells

Kimber, R. G. E., Walker, A. B., Schroder-Turk, G. E. & Cleaver, D. J., 28 Jan 2010, In : Physical Chemistry Chemical Physics. 12, 4, p. 844-851 8 p.

Research output: Contribution to journalArticle

59 Citations (Scopus)

Current-voltage characteristics of dendrimer light-emitting diodes

Stevenson, S. G., Samuel, I. D. W., Staton, S. V., Knights, K. A., Burn, P. L., Williams, J. H. T. & Walker, A. B., 29 Sep 2010, In : Journal of Physics D: Applied Physics. 43, 38, 385106.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Dynamic Monte Carlo simulation for highly efficient polymer blend photovoltaics

Meng, L. Y., Shang, Y., Li, Q. K., Li, Y. F., Zhan, X. W., Shuai, Z. G., Kimber, R. G. E. & Walker, A. B., 14 Jan 2010, In : Journal of Physical Chemistry B. 114, 1, p. 36-41 6 p.

Research output: Contribution to journalArticle

112 Citations (Scopus)

Modelling exciton diffusion in disordered conjugated polymers

Athanasopoulos, S., Emelianova, E. V., Walker, A. B. & Beljonne, D., 2010, In : Proceedings of SPIE - The International Society for Optical Engineering. 7722, 772214.

Research output: Contribution to journalArticle

Open Access
File
4 Citations (Scopus)
105 Downloads (Pure)
44 Citations (Scopus)
2009

Exciton diffusion in energetically disordered organic materials

Athanasopoulos, S., Emelianova, E. V., Walker, A. B. & Beljonne, D., Nov 2009, In : Physical Review B. 80, 19, 195209.

Research output: Contribution to journalArticle

87 Citations (Scopus)

Multiscale Modeling of Charge and Energy Transport in Organic Light-Emitting Diodes and Photovoltaics

Walker, A. B., Sep 2009, In : Proceedings of the IEEE. 97, 9, p. 1587-1596 10 p.

Research output: Contribution to journalArticle

File
12 Citations (Scopus)
112 Downloads (Pure)
2008

Dye-sensitized solar cells based on oriented TiO2 nanotube arrays: transport, trapping, and transfer of electrons

Jennings, J. R., Ghicov, A., Peter, L. M., Schmuki, P. & Walker, A. B., 8 Oct 2008, In : Journal of the American Chemical Society. 130, 40, p. 13364-13372 9 p.

Research output: Contribution to journalArticle

685 Citations (Scopus)

Trap limited exciton transport in conjugated polymers

Athanasopoulos, S., Hennebicq, E., Beljonne, D. & Walker, A., 2008, In : Journal of Physical Chemistry C. 112, 30, p. 11532-11538 7 p.

Research output: Contribution to journalArticle

58 Citations (Scopus)

Two-dimensional simulations of bulk heterojunction solar cell characteristics

Williams, J. & Walker, A., 2008, In : Nanotechnology. 19, 42, p. 424011 1 p.

Research output: Contribution to journalArticle

42 Citations (Scopus)
2007

Predictive study of charge transport in disordered semiconducting polymers

Athanasopoulos, S., Kirkpatrick, J., Martinez, D., Frost, J. M., Foden, C. M., Walker, A. B. & Nelson, J., 2007, In : Nano Letters. 7, 6, p. 1785-1788 4 p.

Research output: Contribution to journalArticle

72 Citations (Scopus)

Transient photocurrents in dye-sensitized nanocrystalline solar cells

Walker, A. B., Peter, L. M., Martinez, D. & Lobato, K., 2007, In : Chimia. 61, 12, p. 792-795 4 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)
2006

Analysis of photovoltage decay transients in dye-sensitized solar cells

Walker, A. B., Peter, L. M., Lobato, K. & Cameron, P., 2006, In : Journal of Physical Chemistry B. 110, 50, p. 25504-25507 4 p.

Research output: Contribution to journalArticle

73 Citations (Scopus)

Interpretation of apparent activation energies for electron transport in dye-sensitized nanocrystalline solar cells

Peter, L. M., Walker, A. B., Boschloo, G. & Hagfeldt, A., 2006, In : Journal of Physical Chemistry B. 110, 28, p. 13694-13699 6 p.

Research output: Contribution to journalArticle

57 Citations (Scopus)
2005

Dynamical Monte Carlo modelling of organic solar cells: The dependence of internal quantum efficiency on morphology

Watkins, P. K., Walker, A. B. & Verschoor, G. L. B., 2005, In : Nano Letters. 5, 9, p. 1814-1818 5 p.

Research output: Contribution to journalArticle

326 Citations (Scopus)

Electrical transport characteristics of single-layer organic devices from theory and experiment

Martin, S. J., Walker, A. B., Campbell, A. J. & Bradley, D. D. C., 2005, In : Journal of Applied Physics. 98, 6

Research output: Contribution to journalArticle

34 Citations (Scopus)

Grain morphology and trapping effects on electron transport in dye-sensitized nanocrystalline solar cells

Cass, M. J., Walker, A. B., Martinez, D. & Peter, L. M., 2005, In : Journal of Physical Chemistry B. 109, 11, p. 5100-5107 8 p.

Research output: Contribution to journalArticle

88 Citations (Scopus)
2004

Degradation in blue-emitting conjugated polymer diodes due to loss of ohmic hole injection

Khan, R. U. A., Bradley, D. D. C., Webster, M. A., Auld, J. L. & Walker, A. B., 2004, In : Applied Physics Letters. 84, 6, p. 921-923 3 p.

Research output: Contribution to journalArticle

38 Citations (Scopus)

Effect of spatial irregularities on the temperature and field dependence of the mobility in liquid-crystalline conjugated polymer films

Martin, S. J., Kambili, A. & Walker, A. B., 2004, In : Macromolecular Symposia. 212, p. 263-268 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2003

Influence of grain morphology on electron transport in dye sensitized nanocrystalline solar cells

Cass, M. J., Qiu, F. L., Walker, A. B., Fisher, A. C. & Peter, L. M., 2003, In : Journal of Physical Chemistry B. 107, 1, p. 113-119 7 p.

Research output: Contribution to journalArticle

123 Citations (Scopus)

Microwave reflectance studies of photoelectrochemical kinetics at semiconductor electrodes. 1. Steady-state, transient, and periodic responses

Cass, M. J., Duffy, N. W., Peter, L. M., Pennock, S. R., Ushiroda, S. & Walker, A. B., 24 May 2003, In : Journal of Physical Chemistry B. 107, 24, p. 5857-5863 7 p.

Research output: Contribution to journalArticle

19 Citations (Scopus)
9 Citations (Scopus)

Temperature and field dependence of the mobility of highly ordered conjugated polymer films

Martin, S. J., Kambili, A. & Walker, A. B., 2003, In : Physical Review B. 67, 16

Research output: Contribution to journalArticle

19 Citations (Scopus)
2002

Applications of microwave reflectance methods to the study of p-Si in fluoride solutions

Cass, M. J., Duffy, N. W., Kirah, K., Peter, L. M., Pennock, S. R., Ushiroda, S. & Walker, A. B., 13 Dec 2002, In : Journal of Electroanalytical Chemistry. 538-539, p. 191-203 13 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)