Professor of Functional Materials

Biography

I was born in Buenos Aires, Argentina in 1980 but grew up in London, UK. I studied Chemistry at Oxford, before going on to do a PhD at Imperial College with Prof. Charlotte Williams. I then spent a year at the University of Washington in Seattle working as a postdoc for Prof. Christine Luscombe. After this I returned to Imperial College to do a second postdoc with Prof. Iain McCulloch. I was awarded am Imperial College Junior Research Fellowship in 2012 before being appointed as a lecturer at University College London in 2013. In 2015 I was awarded an ERC starting grant and then in 2017 I was appointed as a lecturer joint between the physics and chemistry departments at the University of Cambridge. I was awarded an EPSRC fellowship in 2019 and then promoted to Professor (Grade 12) in 2022.

Research

Research in my group involves the synthesis of novel conjugated materials for use in organic solar cells, light emitting diodes and transistors. We are particularly interested in synthesizing materials that help understand and utilise triplet and other unusual excited states (eg. singlet fission, upconversion, reverse intersystem crossing) due to their unique and fascinating properties. The virtually infinite tunability of conjugated polymers means that they can be applied to an immense number of applications. My research group is currently made up of 6 PDRAs and 4 PhD students. We also have MSc students join the group every year. We work very closely with other research groups particularly in Physics resulting a mix of disciplines, people and ideas.

Traditionally, much of the development of novel materials has come from a “top-down” approach where a particular research group focuses on one/several types of application. My aim as a scientist is to begin the research process from the “bottom up”. I believe that by developing a true understanding of the fundamental properties of conjugated materials, simultaneous advancement across all areas of conjugated polymer research and its relevant applications.

There are a few key properties of conjugated polymers which are important across ALL applications, which if they could be controlled would offer rapid advances across all fields of research. For instance, it could be argued that in applications where there is interaction of light and matter, the three most important of these properties are: excited state energy, lifetime and diffusion length. My aim is to synthesize novel systems which allow us to firstly measure, and then control these basic properties which are still not understood.

By developing a true understanding of how structure (both primary chemical, and secondary morphological) affects the fundamental properties it will be possible to make rapid advances across all fields. In particular, using this approach I believe it is possible to make great advances in areas which I believe represent some key challenges for modern science (eg clean energy generation and storage)

Find out more about Professor Bronstein's research

Publications

Synthesis of a Novel Fused Thiophene‐thieno[3,2‐b]thiophene‐thiophene Donor Monomer and Co‐polymer for Use in OPV and OFETs
H Bronstein, RS Ashraf, Y Kim, AJP White, T Anthopoulos, K Song, D James, W Zhang, I McCulloch
Macromolecular rapid communications
(2011)
32
Indacenodithiophene-co-benzothiadiazole Copolymers for High Performance Solar Cells or Transistors via Alkyl Chain Optimization
H Bronstein, DS Leem, R Hamilton, P Woebkenberg, S King, W Zhang, RS Ashraf, M Heeney, TD Anthopoulos, J de Mello, I McCulloch
Macromolecules
(2011)
44
Thieno[3,2-b]thiophene−Diketopyrrolopyrrole-Containing Polymers for High-Performance Organic Field-Effect Transistors and Organic Photovoltaic Devices
H Bronstein, Z Chen, RS Ashraf, W Zhang, J Du, JR Durrant, P Shakya Tuladhar, K Song, SE Watkins, Y Geerts, MM Wienk, RAJ Janssen, T Anthopoulos, H Sirringhaus, M Heeney, I McCulloch
Journal of the American Chemical Society
(2011)
133
Silaindacenodithiophene semiconducting polymers for efficient solar cells and high-mobility ambipolar transistors
RS Ashraf, Z Chen, DS Leem, H Bronstein, W Zhang, B Schroeder, Y Geerts, J Smith, S Watkins, TD Anthopoulos, H Sirringhaus, JC de Mello, M Heeney, I McCulloch
Chemistry of Materials
(2010)
23
Pressure-Induced Delocalization of Photoexcited States in a Semiconducting Polymer
S Albert-Seifried, JM Hodgkiss, F Laquai, HA Bronstein, CK Williams, RH Friend
Physical Review Letters
(2010)
105
Charge recombination and exciton annihilation reactions in conjugated polymer blends.
IA Howard, JM Hodgkiss, X Zhang, KR Kirov, HA Bronstein, CK Williams, RH Friend, S Westenhoff, NC Greenham
Journal of the American Chemical Society
(2009)
132
The Effects of Binding Ligand Variation on the Nickel Catalyzed Externally Initiated Polymerization of 2-Bromo-3-hexyl-5-iodothiophene
N Doubina, M Stoddard, HA Bronstein, AK Jen, CK Luscombe
Macromolecular Chemistry and Physics
(2009)
210
Synthesis of Fluoro-Substituted Silole-Containing Conjugated Materials
S Horst, NR Evans, HA Bronstein, CK Williams
Journal of Polymer Science Part A: Polymer Chemistry
(2009)
47
Externally initiated regioregular P3HT with controlled molecular weight and narrow polydispersity.
HA Bronstein, CK Luscombe
Journal of the American Chemical Society
(2009)
131
Charge Recombination in Organic Photovoltaic Devices with High Open-Circuit Voltages
S Westenhoff, IA Howard, JM Hodgkiss, KR Kirov, HA Bronstein, CK Williams, NC Greenham, RH Friend
J Am Chem Soc
(2008)
130

Telephone number

01223 336697

Email address