Brian C. O’Regan

48.0k citations

93 papers · 42.1k indexed · 8 hit papers · h-index 63

Impact in

Renewable Energy, Sustainability and the Environment top 0.01%
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
Polymers and Plastics top 0.05%
- Conducting polymers and applications
- Transition Metal Oxide Nanomaterials

Papers in

Renewable Energy, Sustainability and the Environment 62
- TiO2 Photocatalysis and Solar Cells 60
- Advanced Photocatalysis Techniques 48
Polymers and Plastics 23
- Conducting polymers and applications 14
- Transition Metal Oxide Nanomaterials 9

Co-authors: Michaël Grätzel James R. Durrant Piers R. F. Barnes Jenny Nelson Aron Walsh Jarvist M. Frost Christopher Eames M. Saiful Islam
Journals: The Journal of Physical Chemistry C (11 papers)Journal of the American Chemical Society (9 papers)The Journal of Physical Chemistry B (7 papers)Advanced Materials (6 papers)The Journal of Physical Chemistry Letters (5 papers)
Partner nations: United Kingdom Netherlands United States

In The Last Decade

Brian C. O’Regan

93 papers receiving 41.1k citations

Hit Papers

8 papers align trajectories log scale

Evidence for ion migration in hybrid perovskite solar cells with minimal hysteresis 2016 · 681 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2016 Nature Communications
2015 Nature Communications
2015 Nature Communications
2011 Chemistry of Materials
2009 Journal of the American Chemical Society
2008 Applied Physics Letters
1991 Nature
1990 The Journal of Physical Chemistry

Peers

Countries citing papers authored by Brian C. O’Regan

Since Specialization

Citations

This map shows the geographic impact of Brian C. O’Regan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Brian C. O’Regan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Brian C. O’Regan more than expected).

Fields of papers citing papers by Brian C. O’Regan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Brian C. O’Regan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Brian C. O’Regan. The network helps show where Brian C. O’Regan may publish in the future.

Co-authors

The 25 scholars most cited alongside Brian C. O’Regan, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Brian C. O’Regan Line = papers co-authored together Brian C. O’Regan links everyone, so they are left out of the graph.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

#	Work
1	Mobile Ion Concentration Measurement and Open-Access Band Diagram Simulation Platform for Halide Perovskite Solar Cells Joule ·Luca Bertoluzzi, Caleb C. Boyd, Nicholas Rolston, Jixian Xu, Rohit Prasanna, Brian C. O’Regan, Michael D. McGehee	2019	154
2	Interpretation of inverted photocurrent transients in organic lead halide perovskite solar cells: proof of the field screening by mobile ions and determination of the space charge layer widths Energy & Environmental Science ·Rebecca A. Belisle, William Nguyen, Andrea R. Bowring, Philip Calado, Xiaoe Li, S.J.C. Irvine, Michael D. McGehee, Piers R. F. Barnes, Brian C. O’Regan	2016	151
3	The dynamics of methylammonium ions in hybrid organic–inorganic perovskite solar cells Nature Communications ·Aurélien M. A. Leguy, Jarvist M. Frost, Andrew P. McMahon, Victoria García Sakai, W. Kockelmann, C.W. Law, Xiaoe Li, Fabrizia Foglia, Aron Walsh, Brian C. O’Regan, Jenny Nelson, João T. Cabral, Piers R. F. Barnes Hit paper breakdown →	2015	552
4	Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO₂ Journal of Materials Chemistry A ·Flannan T. F. O'Mahony, Yong Hui Lee, Cameron Jellett, Stoichko Dmitrov, Daniel Bryant, James R. Durrant, Brian C. O’Regan, Michael Gräetzel, Mohammad Khaja Nazeeruddin, Saif A. Haque	2015	122
5	Ionic transport in hybrid lead iodide perovskite solar cells Nature Communications ·Christopher Eames, Jarvist M. Frost, Piers R. F. Barnes, Brian C. O’Regan, Aron Walsh, M. Saiful Islam Hit paper breakdown →	2015	2347
6	On Charge Carrier Recombination in Sb₂S₃ and Its Implication for the Performance of Solar Cells The Journal of Physical Chemistry C ·Arouna Darga, Denis Mencaraglia, Christophe Longeaud, Tom J. Savenije, Brian C. O’Regan, S. Bourdais, Takuma Muto, Bruno Delatouche, Gilles Dennler	2013	54
7	Interpretation of Optoelectronic Transient and Charge Extraction Measurements in Dye‐Sensitized Solar Cells Advanced Materials ·Piers R. F. Barnes, Kati Miettunen, Xiaoe Li, Assaf Y. Anderson, Takeru Bessho, Michaël Grätzel, Brian C. O’Regan	2013	261
8	New insight into the regeneration kinetics of organic dye sensitised solar cells Chemical Communications ·Stefano Martiniani, Assaf Y. Anderson, ChunHung Law, Brian C. O’Regan, Claudia Barolo	2012	31
9	Measured binding coefficients for iodine and ruthenium dyes; implications for recombination in dye sensitised solar cells Physical Chemistry Chemical Physics ·Xiaoe Li, Anna Reynal, Piers R. F. Barnes, Robin Humphry‐Baker, Shaik M. Zakeeruddin, Filippo De Angelis, Brian C. O’Regan	2012	44
10	Hole‐Transporting Transistors and Circuits Based on the Transparent Inorganic Semiconductor Copper(I) Thiocyanate (CuSCN) Processed from Solution at Room Temperature Advanced Materials ·Pichaya Pattanasattayavong, Nir Yaacobi‐Gross, Kui Zhao, Guy O. Ngongang Ndjawa, Jinhua Li, Feng Yan, Brian C. O’Regan, Aram Amassian, Thomas D. Anthopoulos	2012	196
11	Electric field-induced hole transport in copper(i) thiocyanate (CuSCN) thin-films processed from solution at room temperature Chemical Communications ·Pichaya Pattanasattayavong, Guy O. Ngongang Ndjawa, Kui Zhao, Kang Wei Chou, Nir Yaacobi‐Gross, Brian C. O’Regan, Aram Amassian, Thomas D. Anthopoulos	2012	170
12	Simulation and measurement of complete dye sensitised solar cells: including the influence of trapping, electrolyte, oxidised dyes and light intensity on steady state and transient device behaviour Physical Chemistry Chemical Physics ·Piers R. F. Barnes, Assaf Y. Anderson, James R. Durrant, Brian C. O’Regan	2011	104
13	Recombination Dynamics as a Key Determinant of Open Circuit Voltage in Organic Bulk Heterojunction Solar Cells: A Comparison of Four Different Donor Polymers Advanced Materials ·Andrea Maurano, Rick Hamilton, Chris G. Shuttle, Amy M. Ballantyne, Jenny Nelson, Brian C. O’Regan, Weimin Zhang, Iain McCulloch, Hamed Azimi, Mauro Morana, Christoph J. Brabec, James R. Durrant	2010	347
14	Water‐Based Electrolytes for Dye‐Sensitized Solar Cells Advanced Materials ·C.W. Law, Shehan C. Pathirana, Xaioe Li, Assaf Y. Anderson, Piers R. F. Barnes, Andrea Listorti, Tarek H. Ghaddar, Brian C. O’Regan	2010	155
15	Simultaneous Transient Absorption and Transient Electrical Measurements on Operating Dye-Sensitized Solar Cells: Elucidating the Intermediates in Iodide Oxidation The Journal of Physical Chemistry C ·Assaf Y. Anderson, Piers R. F. Barnes, James R. Durrant, Brian C. O’Regan	2010	80
16	Factors controlling charge recombination under dark and light conditions in dye sensitised solar cells Physical Chemistry Chemical Physics ·Piers R. F. Barnes, Assaf Y. Anderson, Mindaugas Juozapavicius, Lingxuan Liu, Xiaoe Li, Emilio Palomares, Amparo Forneli, Brian C. O’Regan	2010	69
17	Re-evaluation of Recombination Losses in Dye-Sensitized Cells: The Failure of Dynamic Relaxation Methods to Correctly Predict Diffusion Length in Nanoporous Photoelectrodes Nano Letters ·Piers R. F. Barnes, Lingxuan Liu, Xiaoe Li, Assaf Y. Anderson, Hawraa Kisserwan, Tarek H. Ghaddar, James R. Durrant, Brian C. O’Regan	2009	85
18	The Effect of Al₂O₃ Barrier Layers in TiO₂/Dye/CuSCN Photovoltaic Cells Explored by Recombination and DOS Characterization Using Transient Photovoltage Measurements The Journal of Physical Chemistry B ·Brian C. O’Regan, Shawn R. Scully, Alex C. Mayer, Emilio Palomares, James R. Durrant	2005	286
19	Electron Dynamics in Nanocrystalline ZnO and TiO₂ Films Probed by Potential Step Chronoamperometry and Transient Absorption Spectroscopy The Journal of Physical Chemistry B ·Richard L. Willis, Carol Olson, Brian C. O’Regan, Thierry Lutz, Jenny Nelson, James R. Durrant	2002	116
20	The photoelectrochemical properties of Nb-doped TiO2 semiconducting ceramic membrane Journal of Electroanalytical Chemistry ·Hirofumi Kikkawa, Brian C. O’Regan, Marc A. Anderson	1991	16

About Brian C. O’Regan

Brian C. O’Regan is a scholar working on Renewable Energy, Sustainability and the Environment, Polymers and Plastics, Electrochemistry, Materials Chemistry and Bioengineering, having authored 93 papers that have together received 42.1k indexed citations. Recurring topics across this work include TiO2 Photocatalysis and Solar Cells (60 papers), Advanced Photocatalysis Techniques (48 papers), Quantum Dots Synthesis And Properties (26 papers), Chalcogenide Semiconductor Thin Films (19 papers), Perovskite Materials and Applications (15 papers), Conducting polymers and applications (14 papers), Transition Metal Oxide Nanomaterials (9 papers) and Electrochemical Analysis and Applications (9 papers). The work is most often cited by research in Renewable Energy, Sustainability and the Environment (27.3k citations), Polymers and Plastics (9.3k citations), Materials Chemistry (26.0k citations), Electrical and Electronic Engineering (16.4k citations) and Bioengineering (1.4k citations). Brian C. O’Regan has collaborated with scholars based in United Kingdom, Netherlands and United States. Frequent co-authors include Michaël Grätzel, James R. Durrant, Piers R. F. Barnes, Jenny Nelson, Aron Walsh, Jarvist M. Frost, Christopher Eames, M. Saiful Islam, Xiaoe Li and Daniel T. Schwartz. Their work appears in journals such as The Journal of Physical Chemistry C, Journal of the American Chemical Society, The Journal of Physical Chemistry B, Advanced Materials and The Journal of Physical Chemistry Letters.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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