Prof. Iain McCulloch Profile

Prof. Iain McCulloch

at Univ of Oxford

SPIE Involvement:

Conference Chair | Editor | Author

Publications (21)

Proceedings Article | 5 October 2023 Presentation

High-resolution imaging for the analysis of microstructural properties influencing charge transport in IDT-BT

Stefania Moro, Giovanni Costantini, Iain McCulloch, Jenny Nelson

Proceedings Volume PC12662, PC1266208 (2023) https://doi.org/10.1117/12.2677370

KEYWORDS: Scanning tunneling microscopy, Polymers, Visualization, Thin films, Nanolithography, Monolayers, Image resolution, Field effect transistors, Diseases and disorders

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Proceedings Article | 3 October 2022 Presentation

The role of electron affinity in advancing the electrical performance of n-type semiconducting polymers (Conference Presentation)

Maryam Alsufyani, Benjamin Moss, Karl Thorley, Ruiheng Ru, Iain McCulloch, Reem Rashid, Jonathan Rivnay, James Durrant

Proceedings Volume PC12211, PC122110D (2022) https://doi.org/10.1117/12.2651707

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Proceedings Article | 10 March 2020 Presentation

Probing carrier extraction from lead halide perovskite to charge transport layers by ultrafast spectroscopy (Conference Presentation)

Jafar Khan, Esma Ugur, Furkan Isikgor, Erkan Aydin, Mindaugas Kirkus, Marios Neophytou, Stefaan De Wolf, Iain McCulloch, Frederic Laquai

Proceedings Volume 11278, 112781J (2020) https://doi.org/10.1117/12.2544566

KEYWORDS: Perovskite, Lead, Ultrafast laser spectroscopy, Solar cells, Interfaces, Luminescence, Polymers, Photovoltaics, Metals, Ultrafast measurement systems

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Solution-processed metal-halide perovskite solar cells (PSCs) have received immense attention in the field of photovoltaic research due to their outstanding power conversion efficiency (PCE), which has surpassed 24% in a relative short time. Understanding carrier losses at metal halide perovskite/charge transport layer interfaces is a pre-requisite to bring the efficiency closer to the Shockley-Queisser limit. Ultrafast transient absorption spectroscopy is a vital tool to study such a processes and specifically interfacial recombination can accessed through these measurements, and further in-sights into losses associated with the open circuit voltage Voc are gained. Transient spectroscopy techniques will be used to unravel the dynamics of processes limiting the photoluminescence quantum efficiency and thus the Voc. Employing both transient photoluminescence and transient absorption techniques, enables differentiation be-tween various recombination processes. Here we study the impact of the different hole transport layers, namely, PDPP-3T, NiO and PTAA hole transport layers and reveal the charge carrier recombination. We report the direct observation of hole extraction and carrier recombination dynamics of mixed-cation lead mixed-halide perovskite layers interfacing with a polymeric hole transport layer: PDPP-3T. The dynamics of the ground state bleach of the polymer, which directly reveals the hole extraction and re-combination at the perovskite/polymer interface. The perovskite hole mobility was found to be 3.08 cm2 V-1 s-1. To gain further insight into the hole extraction dynamics, we vary the thickness of the perovskite film. We observe that the hole extraction time is slower with increasing the perovskite thickness following optical excitation from the perovskite side. Mimicking the device architecture via introducing an electron transport layer to the perovskite/PDPP-3T stack resulted in slower carrier recombination dynamics due to decreased charge carrier recombination in the perovskite.

Proceedings Article | 10 September 2019 Presentation

Controlling interfacial phenomena to enhance performance in organic field-effect transistors (Conference Presentation)

Matthew Waldrip, Zachary Lamport, Iain McCulloch, Oana Jurchescu

Proceedings Volume 11097, 110970F (2019) https://doi.org/10.1117/12.2529544

KEYWORDS: Transistors, Self-assembled monolayers, Electrodes, Gold, Thin films, Electronics, Flexible displays, Sensors, Resistance, Interfaces

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Proceedings Article | 17 September 2018 Presentation

Charge losses in bulk-heterojunction organic solar cells on nanosecond timescale and the role of charge transfer states (Conference Presentation)

Stoichko Dimitrov, James Durrant, Iain McCulloch, Bob Schroeder

Proceedings Volume 10724, 107240O (2018) https://doi.org/10.1117/12.2319932

KEYWORDS: Organic photovoltaics, Solar cells, Polymers, Interfaces, Polymer thin films, Luminescence, Electroluminescence, Spectroscopy, System identification, Fullerenes

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Proceedings Article | 7 November 2016 Presentation

Charge generation in polymer:fullerene photovoltaic systems (Conference Presentation)

Michelle Vezie, Stoichko Dimitrov, Bob Schroeder, Christian Nielsen, Iain McCulloch, Mariano Campoy-Quiles, James Durrant, Jenny Nelson

Proceedings Volume 9942, 99420Z (2016) https://doi.org/10.1117/12.2238485

KEYWORDS: Polymers, Fullerenes, Excitons, Photovoltaics, Polymer thin films, Organic photovoltaics, Solar energy, Internal quantum efficiency, System identification, Oxidation

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Proceedings Article | 2 November 2016 Presentation

Towards highly stable polymer electronics (Conference Presentation)

Mark Nikolka, Iyad Nasrallah, Katharina Broch, Aditya Sadhanala, Michael Hurhangee, Iain McCulloch, Henning Sirringhaus

Proceedings Volume 9943, 99430J (2016) https://doi.org/10.1117/12.2236467

KEYWORDS: Polymers, Organic light emitting diodes, Organic semiconductors, Polymer thin films, Electronics, Flexible displays, Organic electronics, Electronic circuits, Transistors, Amorphous silicon

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Proceedings Article | 26 September 2016 Paper

Effect of molecular weight on the vibronic structure of a diketopyrrolopyrrole polymer

Sophia Hayes, Galatia Pieridou, Michelle Vezie, Sheridan Few, Hugo Bronstein, Iain Meager, Iain McCulloch, Jenny Nelson

Proceedings Volume 9923, 99230N (2016) https://doi.org/10.1117/12.2238123

KEYWORDS: Polymers, Absorption, Raman spectroscopy, Molecular spectroscopy, Medium wave, Electronics, Mass attenuation coefficient, Neodymium, Chemistry, Raman scattering

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Proceedings Article | 5 October 2015 Presentation

Novel nature-inspired conjugated polymers for high performance transistors and solar cells (Presentation Recording)

Hugo Bronstein, Kealan Falon, Nir Yaacobi-Gross, Raja Shahid Ashraf, Iain McCulloch, Thomas Anthopoulos

Proceedings Volume 9568, 95680Q (2015) https://doi.org/10.1117/12.2187844

KEYWORDS: Polymers, Transistors, Solar cells, Crystals, Field effect transistors, Absorbance, Photovoltaics, Annealing, Video, Sensors

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Proceedings Article | 13 September 2012 Paper

Electronic structure tuning of new fused thieno[3,2-b]thieno bisthiophene based polymers via alkyl chain and Group IV heteroatom modulation

Bob Schroeder, Hugo Bronstein, Raja Shahid Ashraf, Weimin Zhang, Zhenggang Huang, Pabitra Shakya Tuladhar, Thomas Anthopoulos, James Durrant, Iain McCulloch

Proceedings Volume 8477, 847709 (2012) https://doi.org/10.1117/12.929622

KEYWORDS: Polymers, Field effect transistors, Silicon, Solar energy, Chemical species, Photovoltaics, Organic photovoltaics, Modulation, Silicon carbide, Germanium

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Proceedings Article | 13 September 2012 Paper

Correlating crystallinity and photophysics for donor polymers of interest for organic photovoltaic devices

Ying Soon, Safa Shoaee, Iain McCulloch, James Durrant

Proceedings Volume 8477, 84771I (2012) https://doi.org/10.1117/12.929888

KEYWORDS: Polymers, Crystals, Organic photovoltaics, Crystallography, Polarons, Excitons, Diffraction, Oxygen, Absorption, Luminescence

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SPIE Journal Paper | 12 March 2012

Charge photogeneration in donor/acceptor organic solar cells

Safa Shoaee, Tracey Clarke, Mattias Eng, Iain McCulloch, James Durrant, Chun Huang, Stephen Barlow, Seth Marder, Eva Espildora, Juan Luis Delgado, Nazario Martin, Bert Campo, Dirk Vanderzande, Martin Heeney

JPE, Vol. 2, Issue 1, 021001, (March 2012) https://doi.org/10.1117/12.10.1117/1.JPE.2.021001

KEYWORDS: Polymers, Organic photovoltaics, Solar cells, Absorption, Excitons, Interfaces, Polarons, Energy efficiency, Polymer thin films, Fullerenes

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Proceedings Article | 13 September 2007 Paper

Distinguishing between nonlinear channel transport and contact effects in organic FETs

B. Hamadani, J. LeBoeuf, R. J. Kline, I. McCulloch, M. Heeney, C. Richter, L. Richter, D. Gundlach

Proceedings Volume 6658, 66580V (2007) https://doi.org/10.1117/12.734433

KEYWORDS: Field effect transistors, Instrument modeling, Transistors, Polymers, Resistance, Data modeling, Semiconductors, Gold, Electrodes, Information operations

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Proceedings Article | 3 November 2006 Paper

TOF mobility measurements in pristine films of P3HT: control of hole injection and influence of film thickness

Amy Ballantyne, Joanne Wilson, Jenny Nelson, Donal Bradley, James Durrant, Martin Heeney, Warren Duffy, Iain McCulloch

Proceedings Volume 6334, 633408 (2006) https://doi.org/10.1117/12.680655

KEYWORDS: Polymers, Annealing, Polymer thin films, Thin films, Temperature metrology, Electrodes, Thin film devices, Aluminum, Measurement devices, Indium

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Proceedings Article | 25 August 2006 Paper

The influence of molecular weight on the microstructure and thin film transistor characteristics of pBTTT polymers.

Rick Hamilton, Clare Bailey, Warren Duffy, Martin Heeney, Maxim Shkunov, David Sparrowe, Steve Tierney, Iain McCulloch, R. Joseph Kline, Dean DeLongchamp, Michael Chabinyc

Proceedings Volume 6336, 633611 (2006) https://doi.org/10.1117/12.682874

KEYWORDS: Polymers, Thin films, Field effect transistors, Transistors, Semiconductors, Crystals, Thin film devices, Measurement devices, Argon, Liquids

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Proceedings Article | 23 February 2006 Paper

Photolithographically patternable of electroluminescent liquid crystalline materials for full-colour organic light emitting displays

Andrew McGlashon, Katherine Whitehead, Donal Bradley, Martin Heeney, Iain McCulloch, Weimin Zhang, Alasdair Campbell

Proceedings Volume 6117, 61170S (2006) https://doi.org/10.1117/12.646426

KEYWORDS: Crystals, Liquid crystals, Absorbance, Organic light emitting diodes, Solids, Molecules, Liquids, Luminescence, Electroluminescence, Thin films

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Proceedings Article | 30 August 2005 Paper

Effects of semiconductor-dielectric interfaces on polymeric thin-film transistors

Michael Chabinyc, Alberto Salleo, Fred Endicott, Beng Ong, Yiliang Wu, Ping Liu, Martin Heeney, Iain McCulloch

Proceedings Volume 5940, 594012 (2005) https://doi.org/10.1117/12.614573

KEYWORDS: Polymers, Semiconductors, Dielectrics, Polymer thin films, Interfaces, Thin films, Silicon films, Transistors, Electrodes, Silicon

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Proceedings Article | 30 August 2005 Paper

Stable semiconducting thiophene polymers and their field effect transistor characteristics

Martin Heeney, Clare Bailey, Kristijonas Genevicius, Mark Giles, Maxim Shkunov, David Sparrowe, Steve Tierney, Weimin Zhang, Iain McCulloch

Proceedings Volume 5940, 594007 (2005) https://doi.org/10.1117/12.614778

KEYWORDS: Polymers, Field effect transistors, Transistors, Magnesium, Semiconductors, Nitrogen, Silica, Sodium, Crystals, Glasses

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Proceedings Article | 8 September 2004 Paper

Self-assembled liquid crystalline solution processable semiconductors

Maxim Shkunov, Weimin Zhang, Clare Bailey, Bryan Fleming, Mark Giles, Martin Heeney, Iain Love, David Sparrowe, Steve Tierney, Iain McCulloch, Martin Nielsen, Dag Breiby, Oliver Bunk

Proceedings Volume 5464, (2004) https://doi.org/10.1117/12.545729

KEYWORDS: Field effect transistors, Liquid crystals, Transistors, Molecules, Crystals, Semiconductors, Liquids, Targeting Task Performance metric, Molecular self-assembly, Temperature metrology

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Proceedings Article | 17 November 2003 Paper

New liquid crystalline solution processible organic semiconductors and their performance in field effect transistors

Maxim Shkunov, Weimin Zhang, David Graham, David Sparrowe, Martin Heeney, Mark Giles, Steve Tierney, Clare Bailey, Iain McCulloch, Theo Kreouzis

Proceedings Volume 5217, (2003) https://doi.org/10.1117/12.505831

KEYWORDS: Liquid crystals, Field effect transistors, Crystals, Liquids, Molecules, Transistors, Organic semiconductors, Semiconductors, Photopolymerization, Polymers

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Proceedings Article | 29 June 1998 Paper

Water-castable bottom antireflective coatings

Ping-Hung Lu, Salem Mehtsun, John Sagan, Ralph Dammel, Iain McCulloch, Ming Kang, Hatsuyuki Tanaka, Ken Kimura

Proceedings Volume 3333, (1998) https://doi.org/10.1117/12.312400

KEYWORDS: Polymers, Chromophores, Etching, Coating, Absorption, Bottom antireflective coatings, Lithography, Photoresist processing, Semiconducting wafers, Refractive index

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Showing 5 of 21 publications

Proceedings Volume Editor (15)

SPIE Conference Volume | 6 October 2023

Organic and Hybrid Transistors XXII

SPIE Conference Volume | 3 October 2022

Organic and Hybrid Field-Effect Transistors XXI

SPIE Conference Volume | 27 August 2021

Organic and Hybrid Field-Effect Transistors XX

SPIE Conference Volume | 17 September 2020

Organic and Hybrid Field-Effect Transistors XIX

SPIE Conference Volume | 4 November 2019

Organic and Hybrid Field-Effect Transistors XVIII

Showing 5 of 15 publications

Conference Committee Involvement (18)

Organic and Hybrid Transistors XXIII

20 August 2024 | San Diego, California, United States

Organic and Hybrid Transistors XXII

21 August 2023 | San Diego, California, United States

Organic and Hybrid Field-Effect Transistors XXI

22 August 2022 | San Diego, California, United States

Organic and Hybrid Field-Effect Transistors XX

2 August 2021 | San Diego, California, United States

Organic and Hybrid Field-Effect Transistors XIX

24 August 2020 | Online Only, California, United States

Organic and Hybrid Field-Effect Transistors XVIII

13 August 2019 | San Diego, California, United States

Organic Field-Effect Transistors XVII

21 August 2018 | San Diego, California, United States

Organic Field-Effect Transistors XVI

7 August 2017 | San Diego, California, United States

Organic Field-Effect Transistors XV

29 August 2016 | San Diego, California, United States

Organic Field-Effect Transistors XIV

10 August 2015 | San Diego, California, United States

Organic Field-Effect Transistors XIII

18 August 2014 | San Diego, California, United States

Organic Field-Effect Transistors XII

26 August 2013 | San Diego, California, United States

Organic Field-Effect Transistors XI

13 August 2012 | San Diego, California, United States

Organic Field-Effect Transistors X

22 August 2011 | San Diego, California, United States

Organic Field-Effect Transistors IX

2 August 2010 | San Diego, California, United States

Organic Field-Effect Transistors VIII

3 August 2009 | San Diego, California, United States

Organic Field-Effect Transistors VII

10 August 2008 | San Diego, California, United States

Organic Field-Effect Transistors VI

26 August 2007 | San Diego, California, United States

Showing 5 of 18 Conference Committees

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