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School of Physical and Chemical Sciences

Dr Stoichko Dimitrov


Lecturer in Chemistry

Telephone: +44 (0)20 7882 8884
Room Number: Room 1.14, Joseph Priestley Building


Stoichko was appointed as Lecturer in Chemistry at Queen Mary in September 2019, where he leads a group in Photochemistry and Photophysics of functional nanomaterials and semiconductors. He has previously held positions as a research associate in the group of Prof James Durrant FRS at Imperial College London and Ser Cymru Fellow at the College of Engineering of Swansea University, investigating the nature of the excited state dynamics at organic donor-acceptor interfaces. He has also worked at the Bulgarian Academy of Sciences and at a start-up company developing photocatalytic water treatment reactors. Stoichko’s PhD degree is in ultrafast laser spectroscopy of nanomaterials and DNA, completed at Boston College, USA in 2010. He has an integrated MSc degree from Sofia University, Bulgaria with a thesis focused on light induced complexation of photochromic dyes.

To learn more about Dr Dimitrov’s lab and his team visit


Research Interests:

We are an experimental Photochemistry and Photophysics group, which utilises a range of experimental tools to develop novel functional nanomaterials and semiconductors predominantly for solar energy harvesting technologies. Our interest is in understanding the response of materials on the femtosecond to millisecond timescales to light absorption and the implications for material’s performance in devices like photovoltaics. Our approach is to use time-resolved laser spectroscopy techniques like transient absorption and photoluminescence spectroscopy in combination with material and device fabrication to discover new opportunities for material performance enhancement.

Our group is particularly interested in exploring new approaches to control the excited state dynamics and diffusion in organic and perovskite semiconductors, which are key processes for the function of solar energy harvesting and optoelectronic devices. We are also interested in the potential of using optical spectroscopy techniques to predict material performance. We collaborate extensively with synthetic chemists and engineers from Queen Mary, the University of Cambridge, UCL, Imperial College and Swansea University to develop new processes and materials.


Browse a list of publications by Dr Stoichko Dimitrov

Take a look at Dr Stoichko Dimitrov's Google Scholar citations

    • Ye Q, Xu X, Paghi A et al. (2021), Solution-Processable Carbon Nanotube Nanohybrids for Multiplexed Photoresponsive Devices $nameOfConference

    • Hernández FJ, Fei Z, Osborne C et al. (2021), Triplet Generation Dynamics in Si- and Ge-Bridged Conjugated Copolymers $nameOfConference

    • Péan EV, Dimitrov S, De Castro CS et al. (2020), Interpreting time-resolved photoluminescence of perovskite materials. $nameOfConference

    • Hou B, Kim BS, Lee HKH et al. (2020), Multiphoton Absorption Stimulated Metal Chalcogenide Quantum Dot Solar Cells under Ambient and Concentrated Irradiance $nameOfConference

    • Luo H, Liu Y, Dimitrov SD et al. (2020), Pt single-atoms supported on nitrogen-doped carbon dots for highly efficient photocatalytic hydrogen generation $nameOfConference

    • Daboczi M, Kim J, Lee J et al. (2020), Towards Efficient Integrated Perovskite/Organic Bulk Heterojunction Solar Cells: Interfacial Energetic Requirement to Reduce Charge Carrier Recombination Losses $nameOfConference

    • Luo H, Dimitrov SD, Daboczi M et al. (2020), Nitrogen-doped Carbon Dots/TiO2 Nanoparticle Composites for Photoelectrochemical Water Oxidation $nameOfConference

    • Péan EV, De Castro CS, Dimitrov S et al. (2020), Investigating the Superoxide Formation and Stability in Mesoporous Carbon Perovskite Solar Cells with an Aminovaleric Acid Additive $nameOfConference

    • Luo H, Papaioannou N, Salvadori E et al. (2019), Cover Feature: Manipulating the Optical Properties of Carbon Dots by Fine‐Tuning their Structural Features (ChemSusChem 19/2019) $nameOfConference

    • Luo H, Papaioannou N, Salvadori E et al. (2019), Manipulating the optical properties of carbon dots via fine tuning their structural features. $nameOfConference

    • Luke J, Speller EM, Wadsworth A et al. (2019), Twist and Degrade—Impact of Molecular Structure on the Photostability of Nonfullerene Acceptors and Their Photovoltaic Blends $nameOfConference

    • Speller EM, Clarke AJ, Aristidou N et al. (2019), Toward improved environmental stability of polymer: Fullerene and polymer:Nonfullerene organic solar cells: A common energetic origin of light- A nd oxygen-induced degradation $nameOfConference

    • Tan CH, Wadsworth A, Gasparini N et al. (2019), Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell $nameOfConference

    • Dimitrov SD, Azzouzi M, Wu J et al. (2019), Spectroscopic Investigation of the Effect of Microstructure and Energetic Offset on the Nature of Interfacial Charge Transfer States in Polymer: Fullerene Blends $nameOfConference

    • Kim J, Godin R, Dimitrov SD et al. (2018), Excitation Density Dependent Photoluminescence Quenching and Charge Transfer Efficiencies in Hybrid Perovskite/Organic Semiconductor Bilayers $nameOfConference

    • Sachs M, Sprick RS, Pearce D et al. (2018), Understanding structure-activity relationships in linear polymer photocatalysts for hydrogen evolution $nameOfConference

    • Keiderling C, Dimitrov S, Durrant JR (2017), Exciton and Charge Generation in PC60BM Thin Films $nameOfConference

    • Utzat H, Dimitrov SD, Wheeler S et al. (2017), Charge Separation in Intermixed Polymer:PC70BM Photovoltaic Blends: Correlating Structural and Photophysical Length Scales as a Function of Blend Composition $nameOfConference

    • Collado‐Fregoso E, Deledalle F, Utzat H et al. (2016), Photophysical Study of DPPTT‐T/PC70BM Blends and Solar Devices as a Function of Fullerene Loading: An Insight into EQE Limitations of DPP‐Based Polymers $nameOfConference

    • Baran D, Kirchartz T, Wheeler S et al. (2016), Reduced voltage losses yield 10% efficient fullerene free organic solar cells with >1 V open circuit voltages. $nameOfConference

    • Vezie MS, Dimitrov SD, Schroeder BC et al. (2016), Charge generation in polymer:fullerene photovoltaic systems (Conference Presentation) SPIE Organic Photonics + Electronics

    • Fallon KJ, Wijeyasinghe N, Manley EF et al. (2016), Indolo-naphthyridine-6,13-dione Thiophene Building Block for Conjugated Polymer Electronics: Molecular Origin of Ultrahigh n‑Type Mobility $nameOfConference

    • Fallon KJ, Dimitrov S, Durrant J et al. (2016), Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications Physical Chemistry of Interfaces and Nanomaterials XV

    • Casey A, Dimitrov SD, Shakya-Tuladhar P et al. (2016), Effect of Systematically Tuning Conjugated Donor Polymer Lowest Unoccupied Molecular Orbital Levels via Cyano Substitution on Organic Photovoltaic Device Performance $nameOfConference

    • Holliday S, Ashraf RS, Wadsworth A et al. (2016), High-efficiency and air-stable P3HT-based polymer solar cells with a new non-fullerene acceptor. $nameOfConference

    • Berndl S, Dimitrov SD, Menacher F et al. (2016), Thiazole Orange Dimers in DNA: Fluorescent Base Substitutions with Hybridization Readout. $nameOfConference

    • Dimitrov SD, Schroeder BC, Nielsen CB et al. (2016), Singlet exciton lifetimes in conjugated polymer films for organic solar cells $nameOfConference

    • Andernach R, Utzat H, Dimitrov SD et al. (2015), Synthesis and Exciton Dynamics of Triplet Sensitized Conjugated Polymers. $nameOfConference

    • Dimitrov SD, Wheeler S, Niedzialek D et al. (2015), Polaron pair mediated triplet generation in polymer/fullerene blends $nameOfConference

    • O'Mahony FTF, Lee YH, Jellett C et al. (2015), Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO 2 $nameOfConference

    • Law C, Miseikis L, Dimitrov S et al. (2014), Performance and stability of lead perovskite/TiO2, polymer/PCBM, and dye sensitized solar cells at light intensities up to 70 suns. $nameOfConference

    • Dimitrov SD, Huang Z, Deledalle F et al. (2014), Towards optimisation of photocurrent from fullerene excitons in organic solar cells $nameOfConference

    • Shivanna R, Shoaee S, Dimitrov S et al. (2014), Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor $nameOfConference

    • Huang Z, Fregoso EC, Dimitrov S et al. (2014), Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing $nameOfConference

    • Cappel UB, Dowland SA, Reynolds LX et al. (2013), Charge Generation Dynamics in CdS:P3HT Blends for Hybrid Solar Cells. $nameOfConference

    • Juozapavicius M, Kaucikas M, Dimitrov SD et al. (2013), Evidence for “Slow” Electron Injection in Commercially Relevant Dye-Sensitized Solar Cells by vis–NIR and IR Pump–Probe Spectroscopy $nameOfConference

    • Bronstein H, Hurhangee M, Fregoso EC et al. (2013), Isostructural, Deeper Highest Occupied Molecular Orbital Analogues of Poly(3-hexylthiophene) for High-Open Circuit Voltage Organic Solar Cells $nameOfConference

    • Dimitrov SD, Durrant JR (2013), Materials Design Considerations for Charge Generation in Organic Solar Cells $nameOfConference

    • Bronstein H, Collado‐Fregoso E, Hadipour A et al. (2013), Thieno[3,2‐b]thiophene‐diketopyrrolopyrrole Containing Polymers for Inverted Solar Cells Devices with High Short Circuit Currents $nameOfConference

    • Bakulin AA, Dimitrov SD, Rao A et al. (2013), Charge-transfer state dynamics following hole and electron transfer in organic photovoltaic devices $nameOfConference

    • Dimitrov SD, Bakulin AA, Nielsen CB et al. (2012), On the energetic dependence of charge separation in low-band-gap polymer/fullerene blends $nameOfConference

    • Dimitrov SD, Nielsen CB, Shoaee S et al. (2012), Efficient charge photogeneration by the dissociation of PC 70BM excitons in polymer/fullerene solar cells $nameOfConference

    • Dimitrov SD, Dooley CJ, Trifonov AA et al. (2009), Femtosecond Probing of Optical Phonon Dynamics in Quantum-Confined CdTe Nanocrystals $nameOfConference

    • Dooley CJ, Dimitrov SD, Fiebig T (2008), Ultrafast Electron Transfer Dynamics in CdSe/CdTe Donor−Acceptor Nanorods $nameOfConference


PhD supervision

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