Francesco Furlan

Imperial College London

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Co-Authors

Nicola Gasparini

Imperial College London

Martin Heeney

King Abdullah University of Science and Technology

Davide Nodari

Imperial College London

Julianna Panidi

Imperial College London

Martina Rimmele

Imperial College London

Zhuoran Qiao

Imperial College London

Martyn A. McLachlan

Imperial College London

Matthew J. Fuchter

Imperial College London

Edoardo Angela

Imperial College London

James R. Durrant

Imperial College London

Cooperative Institutions

Georgia Institute of Technology

124

Royal Society of Chemistry

121

Cambridge Consultants (United Kingdom)

112

Institut de Recherche Interdisciplinaire de Grenoble

109

University of London

106

Northwestern University

102

Pohang University of Science and Technology

CIC nanoGUNE

Wake Forest University

Imperial College London

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A comparison of para, meta, and ortho-carborane centred non-fullerene acceptors for organic solar cells

Journal of Materials Chemistry C (2023)

Filip Aniés Francesco Furlan Zhuoran Qiao Valentina Pirela Matthew Bidwell

Unveiling the impact of different structural isomers of carborane-containing non-fullerene acceptors on optoelectronic properties and organic photovoltaic performance.

Carborane

10.1039/d2tc05018h

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Citations (9)

Rational Design of New Conjugated Polymers with Main Chain Chirality for Efficient Optoelectronic Devices: Carbo[6]Helicene and Indacenodithiophene Copolymers as Model Compounds

Advanced Materials (2024)

Clément Gédéon Natalia Del Rio Francesco Furlan Andrea Taddeucci Nicolas Vanthuyne

Abstract The unique properties of conjugated polymers (CPs) in various optoelectronic applications are mainly attributed to their different self‐assembly processes and superstructures. Various methods are utilized to tune and control CP structure and properties with less attention paid to the use of chirality. CPs with main chain chirality are rare and their microscopic and macroscopic properties are still unknown. In this work, the first experimental results are provided along these lines by synthesizing a series of racemic and enantiopure CPs containing statistical and alternating carbo[6]helicene and indacenodithiophene moieties and evaluating their microscopic (optical, energy levels) and macroscopic properties (hole mobilities, photovoltaic performance). It is demonstrated that a small statistical insertion of either the racemic or enantiopure helicene into the polymer backbone finely tunes the microscopic and macroscopic properties as a function of the statistical content. The microscopic properties of the enantiopure versus the racemic polymers with the same helicene loading remain similar. On the contrary, the macroscopic properties, and more interestingly those between the two enantiomeric forms, are altered as a function of the statistical content. Once incorporated into a solar cell device, these chiral CPs display better performance in their enantiopure versus racemic forms.

Helicene

Chirality

Rational design

10.1002/adma.202314337

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Citations (4)

Blending Self-Assembled Monolayers for Enhanced Band Alignment and Improved Morphology in p-i-n Perovskite Photodetectors

ACS Applied Materials & Interfaces (2024)

Edoardo Angela Davide Nodari Francesco Furlan Julianna Panidi Martyn A. McLachlan

Perovskite photodetectors, devices that convert light to electricity, require good extraction and low noise levels to maximize the signal-to-noise ratio. Self-assembling monolayers (SAMs) have been shown to be effective hole transport materials thanks to their atomic layer thickness, transparency, and energetic alignment with the valence band of the perovskite. While efforts are being made to reduce noise levels via the active layer, little has been done to reduce noise via SAM interfacial engineering. Herein, we report hybrid perovskite photodetectors with high detectivity by blending two different SAMs (2-PACz and Me-4PACz). We find that with a 1:1 2-PACz:Me-4PACz ratio (by weight), the devices achieved a low noise of 1 × 10

Morphology

10.1021/acsami.4c06447

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Citations (1)

Contents list

Journal of Materials Chemistry C (2023)

K Gopi G. Umadevi Saidi Reddy Parne P. Nagaraju Michaela Deputy Editor

Permissions Request permissions Contents list J. Mater. Chem. C, 2023, 11, 3895 DOI: 10.1039/D3TC90063K This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given. Read more about how to correctly acknowledge RSC content.

Acknowledgement

10.1039/d3tc90063k

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Impact of Interface Energetic Alignment and Mobile Ions on Charge Carrier Accumulation and Extraction in p‐i‐n Perovskite Solar Cells

Advanced Energy Materials (2023)

Weidong Xu Lucy J. F. Hart Benjamin Moss Pietro Caprioglio Thomas J. Macdonald

Abstract Understanding the kinetic competition between charge extraction and recombination, and how this is impacted by mobile ions, remains a key challenge in perovskite solar cells (PSCs). Here, this issue is addressed by combining operando photoluminescence (PL) measurements, which allow the measurement of real‐time PL spectra during current–voltage ( J–V ) scans under 1‐sun equivalent illumination, with the results of drift‐diffusion simulations. This operando PL analysis allows direct comparison between the internal performance (recombination currents and quasi‐Fermi‐level‐splitting (QFLS)) and the external performance ( J–V ) of a PSC during operation. Analyses of four PSCs with different electron transport materials (ETMs) quantify how a deeper ETM LUMO induces greater interfacial recombination, while a shallower LUMO impedes charge extraction. Furthermore, it is found that a low ETM mobility leads to charge accumulation in the perovskite under short‐circuit conditions. However, thisalone cannot explain the remarkably high short‐circuit QFLS of over 1 eV which is observed in all devices. Instead, drift‐diffusion simulations allow this effect to be assigned to the presence of mobile ions which screen the internal electric field at short‐circuit and lead to a reduction in the short‐circuit current density by over 2 mA cm −2 in the best device.

Charge carrier

Perovskite solar cell

10.1002/aenm.202301102

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Citations (24)

Organic photovoltaics surpass the 20% efficiency milestone

Nature Materials (2025)

Francesco Furlan Nicola Gasparini

Milestone

Acceptor

10.1038/s41563-024-02076-8

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Citations (1)

Narrowband Detection via Charge Collection Narrowing Organic Photodetector Enabled by Low Bandgap Random Terpolymer for Biometric Sensing

Advanced Functional Materials (2025)

Matilde Brunetta Zhuoran Qiao Adibah Zamhuri Francesco Furlan Martina Rimmele

Abstract Achieving spectrally selective organic photodetectors (OPDs) without using broadband‐absorbing semiconductors with input filtering is a strenuous challenge. Charge collection narrowing (CCN) is a promising strategy to obtain spectrally selective near‐infrared (NIR) OPD by adopting a thick bulk heterojunction (BHJ) as active layers. In this work, a random terpolymer comprised from a diketopyrrolopyrrole (DPP), thiophene (T) and benzothiadiazole (BT), ran DPP‐2TBT, is prepared and used as a donor material in combination with the low bandgap non‐fullerene acceptor (NFA) IEICO‐4F. OPDs with a low dark current density (6.88 × 10 −9 A cm −2 ) and a 68 nm full‐width‐at‐half‐maximum (FWHM) narrowband response (R = 0.13 A W −1 at 916 nm) in the near‐infrared are achieved. Finally, an application of the OPD as a biometric heart‐rate sensor via photoplethysmography for real‐time monitoring is demonstrated.

Narrowband

10.1002/adfm.202422637

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Citations (0)

Electrical control of photon spin angular momentum in organic electroluminescent materials

Francesco Furlan Michal Šámal Jiří Rybáček Andrea Taddeucci Marta di Girolamo

The photon spin information encoded in circularly polarised (CP) light is of high interest for current and future technologies, including low power displays, encrypted communications and high performance quantum applications. Engineering organic light-emitting diodes (LED) to emit opposite handed electroluminescent CP light typically requires access to left- and right-handed chiral molecules. In conjugated polymer LEDs, the handedness of CP electroluminescence (EL) also depends on the active layer thickness or direction of current flow. For a given active layer thickness, it has remained unknown whether a single-handed chiral material can emit opposite handedness CP light in the same LED architecture – until now. Here we demonstrate organic LEDs where the handedness of the emitted CP EL can be controlled electrically, solely through the use of interlayers with no change in the emissive material composition or thickness. We reveal that this occurs due to a change in mechanism for the generation of CP EL, as a function of the recombination zone position within the device. This result provides a paradigm shift in the realisation of organic CP-LEDs with controllable spin angular momentum information and further contributes to ongoing discussions relating the fundamental physics of chiral optoelectronics.

Momentum (technical analysis)

10.26434/chemrxiv-2025-rbqh1

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Scaling-up perovskite solar cells on hydrophobic surfaces

Nano Energy (2020)

Furkan H. Isikgor Anand S. Subbiah Mathan K. Eswaran Calvyn T. Howells Aslihan Babayigit

Polarity (international relations)

Perovskite solar cell

10.1016/j.nanoen.2020.105633

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Citations (75)

Biorenewable Solvents for High-Performance Organic Solar Cells

ACS Energy Letters (2023)

Julianna Panidi Eva Mazzolini Flurin Eisner Yúang Fu Francesco Furlan

With the advent of nonfullerene acceptors (NFAs), organic photovoltaic (OPV) devices are now achieving high enough power conversion efficiencies (PCEs) for commercialization. However, these high performances rely on active layers processed from petroleum-based and toxic solvents, which are undesirable for mass manufacturing. Here, we demonstrate the use of biorenewable 2-methyltetrahydrofuran (2MeTHF) and cyclopentyl methyl ether (CPME) solvents to process donor: NFA-based OPVs with no additional additives in the active layer. Furthermore, to reduce the overall carbon footprint of the manufacturing cycle of the OPVs, we use polymeric donors that require a few synthetic steps for their synthesis, namely, PTQ10 and FO6-T, which are blended with the Y-series NFA Y12. High performance was achieved using 2MeTHF as the processing solvent, reaching PCEs of 14.5% and 11.4% for PTQ10:Y12 and FO6-T:Y12 blends, respectively. This work demonstrates the potential of using biorenewable solvents without additives for the processing of OPV active layers, opening the door to large-scale and green manufacturing of organic solar cells.

Active layer

10.1021/acsenergylett.3c00891

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Citations (15)