Richard H. Friend

Cavendish Laboratory, University of Cambridge

Research Area

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JoVE Journal Publications

ArticleTotal : 1	Year
Publication title Cited by 31	2017

Other Publications

Article	Year
Enhancement of charge-transport characteristics in polymeric films using polymer brushes. Nano letters\| PubMed ID: 16522065	2006
Tuning the Semiconducting Properties of Sexithiophene by alpha,omega-Substitution-alpha,omega-Diperfluorohexylsexithiophene: The First n-Type Sexithiophene for Thin-Film Transistors We thank... Angewandte Chemie (International ed. in English)\| PubMed ID: 11169666	2000
Attaching perylene dyes to polyfluorene: three simple, efficient methods for facile color tuning of light-emitting polymers. Journal of the American Chemical Society\| PubMed ID: 12517156	2003
Cyclodextrin-threaded conjugated polyrotaxanes as insulated molecular wires with reduced interstrand interactions. Nature materials\| PubMed ID: 12618803	2002
Self-aligned, vertical-channel, polymer field-effect transistors. Science (New York, N.Y.)\| PubMed ID: 12649478	2003
Solution-processed anodes from layer-structure materials for high-efficiency polymer light-emitting diodes. Journal of the American Chemical Society\| PubMed ID: 12733940	2003
Efficient energy transfer in mixed columnar stacks of hydrogen-bonded oligo(p-phenylene vinylene)s in solution. Angewandte Chemie (International ed. in English)\| PubMed ID: 15065278	2004
Solution-processible conjugated electrophosphorescent polymers. Journal of the American Chemical Society\| PubMed ID: 15174875	2004
Exciton regeneration at polymeric semiconductor heterojunctions. Physical review letters\| PubMed ID: 15245130	2004
General observation of n-type field-effect behaviour in organic semiconductors. Nature\| PubMed ID: 15758994	2005
Correlation between surface photovoltage and blend morphology in polyfluorene-based photodiodes. Nano letters\| PubMed ID: 15826087	2005
Exciton migration in a polythiophene: probing the spatial and energy domain by line-dipole Forster-type energy transfer. The Journal of chemical physics\| PubMed ID: 15836177	2005
Exciton trapping at heterojunctions in polymer blends. The Journal of chemical physics\| PubMed ID: 16035815	2005
Self-organization of nanocrystals in polymer brushes. Application in heterojunction photovoltaic diodes. Nano letters\| PubMed ID: 16159201	2005
Effects of packing structure on the optoelectronic and charge transport properties in poly(9,9-di-n-octylfluorene-alt-benzothiadiazole). Journal of the American Chemical Society\| PubMed ID: 16159283	2005
The effects of supramolecular assembly on exciton decay rates in organic semiconductors. The Journal of chemical physics\| PubMed ID: 16164325	2005
Blue-to-green electrophosphorescence of iridium-based cyclometallated materials. Chemical communications (Cambridge, England)\| PubMed ID: 16175300	2005
Metallic photonic crystals based on solution-processible gold nanoparticles. Nano letters\| PubMed ID: 16608259	2006
Control of morphology in efficient photovoltaic diodes from discotic liquid crystals. The Journal of chemical physics\| PubMed ID: 16689587	2006
Triplet energy back transfer in conjugated polymers with pendant phosphorescent iridium complexes. Journal of the American Chemical Society\| PubMed ID: 16704266	2006
Identification of a quenching species in ruthenium tris-bipyridine electroluminescent devices. Journal of the American Chemical Society\| PubMed ID: 16771489	2006
Effect of temperature and chain length on the bimodal emission properties of single polyfluorene copolymer molecules. The journal of physical chemistry. B\| PubMed ID: 16986881	2006
Anomalous energy transfer dynamics due to torsional relaxation in a conjugated polymer. Physical review letters\| PubMed ID: 17155424	2006
Uniaxial alignment of liquid-crystalline conjugated polymers by nanoconfinement. Nano letters\| PubMed ID: 17341122	2007
Role of intermolecular coupling in the photophysics of disordered organic semiconductors: aggregate emission in regioregular polythiophene. Physical review letters\| PubMed ID: 17677723	2007
Efficiency enhancements in solid-state hybrid solar cells via reduced charge recombination and increased light capture. Nano letters\| PubMed ID: 17918905	2007
Optical spectroscopy of a polyfluorene copolymer at high pressure: intra- and intermolecular interactions. Physical review letters\| PubMed ID: 17995289	2007
Exciplex emission from electroluminescent ladder-type pentaphenylene oligomers bearing both electron- and hole-accepting substituents. The Journal of chemical physics\| PubMed ID: 18247977	2008
Electronic structures of interfacial states formed at polymeric semiconductor heterojunctions. Nature materials\| PubMed ID: 18438413	2008
Tuning interfacial charge-transfer excitons at polymer-polymer heterojunctions under hydrostatic pressure. Physical review letters\| PubMed ID: 18518151	2008
Direct evidence for delocalization of charge carriers at the Fermi level in a doped conducting polymer. Physical review letters\| PubMed ID: 18518400	2008
Probing the morphology and energy landscape of blends of conjugated polymers with sub-10 nm resolution. Physical review letters\| PubMed ID: 18764126	2008
Optoelectronic and charge transport properties at organic-organic semiconductor interfaces: comparison between polyfluorene-based polymer blend and copolymer. Journal of the American Chemical Society\| PubMed ID: 18767836	2008
Charge recombination in organic photovoltaic devices with high open-circuit voltages. Journal of the American Chemical Society\| PubMed ID: 18798623	2008
Low-temperature control of nanoscale morphology for high performance polymer photovoltaics. Nano letters\| PubMed ID: 18950237	2008
"Helter-skelter-like" perylene polyisocyanopeptides. Chemistry (Weinheim an der Bergstrasse, Germany)\| PubMed ID: 19177474	2009
Excitonic versus electronic couplings in molecular assemblies: The importance of non-nearest neighbor interactions. The Journal of chemical physics\| PubMed ID: 19191375	2009
Determining exciton coherence from the photoluminescence spectral line shape in poly(3-hexylthiophene) thin films. The Journal of chemical physics\| PubMed ID: 19239313	2009
Direct evidence for the role of the madelung potential in determining the work function of doped organic semiconductors. Physical review letters\| PubMed ID: 19392545	2009
The relationship between nanoscale architecture and charge transport in conjugated nanocrystals bridged by multichromophoric Polymers. Journal of the American Chemical Society\| PubMed ID: 19405546	2009
Ion-induced formation of charge-transfer states in conjugated polyelectrolytes. Journal of the American Chemical Society\| PubMed ID: 19480454	2009
Single-photon pumping and two-photon probing spectroscopy for the determination of absorption cross-sections in an organic semiconductor. Optics express\| PubMed ID: 19503306	2005
Charge-transfer character of excitons in poly[2,7-(9,9-di-n-octylfluorene)(1-x)-co-4,7-(2,1,3-benzothiadiazole)(x)]. The Journal of chemical physics\| PubMed ID: 19624236	2009
Role of delta-hole-doped interfaces at Ohmic contacts to organic semiconductors. Physical review letters\| PubMed ID: 19659303	2009
Charge recombination and exciton annihilation reactions in conjugated polymer blends. Journal of the American Chemical Society\| PubMed ID: 19961228	2010
High-performance polymer semiconducting heterostructure devices by nitrene-mediated photocrosslinking of alkyl side chains. Nature materials\| PubMed ID: 19966791	2010
Phase-separated thin film structures for efficient polymer blend light-emitting diodes. Nano letters\| PubMed ID: 20102212	2010
Effect of annealing on P3HT:PCBM charge transfer and nanoscale morphology probed by ultrafast spectroscopy. Nano letters\| PubMed ID: 20121212	2010
Formation of nanopatterned polymer blends in photovoltaic devices. Nano letters\| PubMed ID: 20199061	2010
Macromolecular scaffolding: the relationship between nanoscale architecture and function in multichromophoric arrays for organic electronics. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 20217805	2010
Poly(9,9-dioctylfluorene)-based conjugated polyelectrolyte: extended pi-electron conjugation induced by complexation with a surfactant zwitterion. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 20405491	2010
Subnanosecond geminate charge recombination in polymer-polymer photovoltaic devices. Physical review letters\| PubMed ID: 20482142	2010
Dye-sensitized solar cell based on a three-dimensional photonic crystal. Nano letters\| PubMed ID: 20507085	2010
Efficient single-layer polymer light-emitting diodes. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 20564259	2010
Direct measurement of electric field-assisted charge separation in polymer:fullerene photovoltaic diodes. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 20564706	2010
Multichromophoric phthalocyanine-(perylenediimide)(8) molecules: a photophysical study. Chemistry (Weinheim an der Bergstrasse, Germany)\| PubMed ID: 20645341	2010
Exciton fission and charge generation via triplet excitons in pentacene/C60 bilayers. Journal of the American Chemical Society\| PubMed ID: 20735067	2010
Enhanced photoresponse in solid-state excitonic solar cells via resonant energy transfer and cascaded charge transfer from a secondary absorber. Nano letters\| PubMed ID: 21062010	2010
Conjugated zwitterionic polyelectrolyte as the charge injection layer for high-performance polymer light-emitting diodes. Journal of the American Chemical Society\| PubMed ID: 21171591	2011
Surface-directed spinodal decomposition in poly[3-hexylthiophene] and C₆₁-butyric acid methyl ester blends. ACS nano\| PubMed ID: 21189029	2011
Pressure-induced delocalization of photoexcited states in a semiconducting polymer. Physical review letters\| PubMed ID: 21231181	2010
Sequential energy and electron transfer in polyisocyanopeptide-based multichromophoric arrays. The journal of physical chemistry. B\| PubMed ID: 21280605	2011
Tuning the electronic coupling in a low-bandgap donor-acceptor copolymer via the placement of side-chains. The Journal of chemical physics\| PubMed ID: 21428661	2011
Tunable charge transport using supramolecular self-assembly of nanostructured crystalline block copolymers. ACS nano\| PubMed ID: 21500861	2011
High-performance electron-transporting polymers derived from a heteroaryl bis(trifluoroborate). Journal of the American Chemical Society\| PubMed ID: 21648485	2011
Ultrafast dynamics of exciton fission in polycrystalline pentacene. Journal of the American Chemical Society\| PubMed ID: 21755937	2011
Solvent additive control of morphology and crystallization in semiconducting polymer blends. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 22109895	2012
Collective osmotic shock in ordered materials. Nature materials\| PubMed ID: 22120413	2012
Time-evolution of poly(3-hexylthiophene) as an energy relay dye in dye-sensitized solar cells. Nano letters\| PubMed ID: 22208767	2012
Singlet exciton fission-sensitized infrared quantum dot solar cells. Nano letters\| PubMed ID: 22257168	2012
On the role of single regiodefects and polydispersity in regioregular poly(3-hexylthiophene): defect distribution, synthesis of defect-free chains, and a simple model for the determination o... Journal of the American Chemical Society\| PubMed ID: 22329563	2012
The Role of Driving Energy and Delocalized States for Charge Separation in Organic Semiconductors. Science (New York, N.Y.)\| PubMed ID: 22362882	2012
Excitons and charges at organic semiconductor heterojunctions. Faraday discussions\| PubMed ID: 22470984	2012
Highly efficient single-layer polymer ambipolar light-emitting field-effect transistors. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 22513713	2012
Overcoming the electroluminescence efficiency limitations of perovskite light-emitting diodes. Science (New York, N.Y.)\| PubMed ID: 26785482	2015
Morphology-dependent charge photogeneration in donor-acceptor block copolymer films based on poly(3-hexylthiophene)-block-poly(perylene bisimide acrylate). The journal of physical chemistry. B\| PubMed ID: 22759276	2012
In situ measurement of exciton energy in hybrid singlet-fission solar cells. Nature communications\| PubMed ID: 22910365	2012
Direct observation of photoinduced bound charge-pair states at an organic-inorganic semiconductor interface. Physical review letters\| PubMed ID: 23004305	2012
Synthesis and photophysics of fully π-conjugated heterobis-functionalized polymeric molecular wires via Suzuki chain-growth polymerization. Journal of the American Chemical Society\| PubMed ID: 23020174	2012
On the energetic dependence of charge separation in low-band-gap polymer/fullerene blends. Journal of the American Chemical Society\| PubMed ID: 23094985	2012
Aqueous self-assembly of an electroluminescent double-helical metallopolymer. Journal of the American Chemical Society\| PubMed ID: 23101888	2012
Recombination Dynamics of Charge Pairs in a Push-Pull Polyfluorene-Derivative. The journal of physical chemistry. B\| PubMed ID: 23151039	2012
High internal quantum efficiency in fullerene solar cells based on crosslinked polymer donor networks. Nature communications\| PubMed ID: 23271655	2012
Control of intrachain charge transfer in model systems for block copolymer photovoltaic materials. Journal of the American Chemical Society\| PubMed ID: 23480019	2013
Singlet exciton fission in polycrystalline pentacene: from photophysics toward devices. Accounts of chemical research\| PubMed ID: 23656886	2013
Solar power. Preface. Philosophical transactions. Series A, Mathematical, physical, and engineering sciences\| PubMed ID: 23816917	2013
Activated singlet exciton fission in a semiconducting polymer. Journal of the American Chemical Society\| PubMed ID: 23883167	2013
Suppressing recombination in polymer photovoltaic devices via energy-level cascades. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 23907735	2013
The role of spin in the kinetic control of recombination in organic photovoltaics. Nature\| PubMed ID: 23925118	2013
Polymer crystallization as a tool to pattern hybrid nanostructures: growth of 12 nm ZnO arrays in poly(3-hexylthiophene). Nano letters\| PubMed ID: 23964899	2013
Temperature-Independent Singlet Exciton Fission in Tetracene. Journal of the American Chemical Society\| PubMed ID: 24148017	2013
Singlet exciton fission in solution. Nature chemistry\| PubMed ID: 24256865	2013
Ultrafast long-range charge separation in organic semiconductor photovoltaic diodes. Science (New York, N.Y.)\| PubMed ID: 24336568	2014
Triplet dynamics in pentacene crystals: applications to fission-sensitized photovoltaics. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 24375546	2014
Bimolecular recombination in organic photovoltaics. Annual review of physical chemistry\| PubMed ID: 24423376	2014
Unequal partnership: asymmetric roles of polymeric donor and fullerene acceptor in generating free charge. Journal of the American Chemical Society\| PubMed ID: 24460057	2014
Quantitative bimolecular recombination in organic photovoltaics through triplet exciton formation. Journal of the American Chemical Society\| PubMed ID: 24521399	2014
Efficiency limitations in a low band-gap diketopyrrolopyrrole-based polymer solar cell. Physical chemistry chemical physics : PCCP\| PubMed ID: 24590237	2014
A transferable model for singlet-fission kinetics. Nature chemistry\| PubMed ID: 24848234	2014
Nanosecond intersystem crossing times in fullerene acceptors: implications for organic photovoltaic diodes. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 24902831	2014
How disorder controls the kinetics of triplet charge recombination in semiconducting organic polymer photovoltaics. Physical chemistry chemical physics : PCCP\| PubMed ID: 24922118	2014
Temperature- and voltage-induced ligand rearrangement of a dynamic electroluminescent metallopolymer. Angewandte Chemie (International ed. in English)\| PubMed ID: 24962081	2014
Bright light-emitting diodes based on organometal halide perovskite. Nature nanotechnology\| PubMed ID: 25086602	2014
Highly efficient inverted polymer light-emitting diodes using surface modifications of ZnO layer. Nature communications\| PubMed ID: 25204355	2014
Resonant energy transfer of triplet excitons from pentacene to PbSe nanocrystals. Nature materials\| PubMed ID: 25282509	2014
Heterojunction modification for highly efficient organic-inorganic perovskite solar cells. ACS nano\| PubMed ID: 25415931	2014
Engineering Schottky contacts in open-air fabricated heterojunction solar cells to enable high performance and ohmic charge transport. ACS applied materials & interfaces\| PubMed ID: 25418326	2014
Solution-processable singlet fission photovoltaic devices. Nano letters\| PubMed ID: 25517654	2015
Improved Exciton Dissociation at Semiconducting Polymer:ZnO Donor:Acceptor Interfaces via Nitrogen Doping of ZnO. Advanced functional materials\| PubMed ID: 25520604	2014
Enhanced performance in fluorene-free organometal halide perovskite light-emitting diodes using tunable, low electron affinity oxide electron injectors. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 25573086	2015
In situ optical measurement of charge transport dynamics in organic photovoltaics. Nano letters\| PubMed ID: 25585168	2015
Ultrasmooth organic-inorganic perovskite thin-film formation and crystallization for efficient planar heterojunction solar cells. Nature communications\| PubMed ID: 25635571	2015
Interfacial control toward efficient and low-voltage perovskite light-emitting diodes. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 25708283	2015
Efficient light-emitting diodes based on nanocrystalline perovskite in a dielectric polymer matrix. Nano letters\| PubMed ID: 25710194	2015
Atmospheric influence upon crystallization and electronic disorder and its impact on the photophysical properties of organic-inorganic perovskite solar cells. ACS nano\| PubMed ID: 25712705	2015
The nature of singlet exciton fission in carotenoid aggregates. Journal of the American Chemical Society\| PubMed ID: 25825939	2015
Size-Dependent Photon Emission from Organometal Halide Perovskite Nanocrystals Embedded in an Organic Matrix. The journal of physical chemistry letters\| PubMed ID: 25949773	2015
Organic semiconductor spintronics: utilizing triplet excitons in organic electronics. Philosophical transactions. Series A, Mathematical, physical, and engineering sciences\| PubMed ID: 25987580	2015
Identification of a triplet pair intermediate in singlet exciton fission in solution. Proceedings of the National Academy of Sciences of the United States of America\| PubMed ID: 26060309	2015
Improved Open- Circuit Voltage in ZnO-PbSe Quantum Dot Solar Cells by Understanding and Reducing Losses Arising from the ZnO Conduction Band Tail. Advanced energy materials\| PubMed ID: 26225131	2014
Blue-Green Color Tunable Solution Processable Organolead Chloride-Bromide Mixed Halide Perovskites for Optoelectronic Applications. Nano letters\| PubMed ID: 26236949	2015
High Photoluminescence Efficiency and Optically Pumped Lasing in Solution-Processed Mixed Halide Perovskite Semiconductors. The journal of physical chemistry letters\| PubMed ID: 26269988	2014
Preparation of Single-Phase Films of CH3NH3Pb(I1-xBrx)3 with Sharp Optical Band Edges. The journal of physical chemistry letters\| PubMed ID: 26277936	2014
Charge-Transfer State Dynamics Following Hole and Electron Transfer in Organic Photovoltaic Devices. The journal of physical chemistry letters\| PubMed ID: 26291233	2013
A first-principles study of the vibrational properties of crystalline tetracene under pressure. Journal of physics. Condensed matter : an Institute of Physics journal\| PubMed ID: 26328594	2015
Hot-carrier cooling and photoinduced refractive index changes in organic-inorganic lead halide perovskites. Nature communications\| PubMed ID: 26404048	2015
Spin-dependent recombination probed through the dielectric polarizability. Nature communications\| PubMed ID: 26439933	2015
Influence of an Inorganic Interlayer on Exciton Separation in Hybrid Solar Cells. ACS nano\| PubMed ID: 26548399	2015
Enhanced optoelectronic quality of perovskite thin films with hypophosphorous acid for planar heterojunction solar cells. Nature communications\| PubMed ID: 26615763	2015
Harvesting the Full Potential of Photons with Organic Solar Cells. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 26663421	2016
Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystals. Journal of the American Chemical Society\| PubMed ID: 26901659	2016
Highly Efficient Perovskite Nanocrystal Light-Emitting Diodes Enabled by a Universal Crosslinking Method. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 26990965	2016
Photon recycling in lead iodide perovskite solar cells. Science (New York, N.Y.)\| PubMed ID: 27013728	2016
Improving the Stability and Performance of Perovskite Light-Emitting Diodes by Thermal Annealing Treatment. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 27239729	2016
Efficient Visible Quasi-2D Perovskite Light-Emitting Diodes. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 27334788	2016
Tunable Near-Infrared Luminescence in Tin Halide Perovskite Devices. The journal of physical chemistry letters\| PubMed ID: 27336412	2016
Correlation between Photovoltaic Performance and Interchain Ordering Induced Delocalization of Electronics States in Conjugated Polymer Blends. ACS applied materials & interfaces\| PubMed ID: 27415029	2016
Impact of a Mesoporous Titania-Perovskite Interface on the Performance of Hybrid Organic-Inorganic Perovskite Solar Cells. The journal of physical chemistry letters\| PubMed ID: 27472458	2016
Compatibilization of All-Conjugated Polymer Blends for Organic Photovoltaics. ACS nano\| PubMed ID: 27482842	2016
What Controls the Rate of Ultrafast Charge Transfer and Charge Separation Efficiency in Organic Photovoltaic Blends. Journal of the American Chemical Society\| PubMed ID: 27538341	2016
Metal-encapsulated organolead halide perovskite photocathode for solar-driven hydrogen evolution in water. Nature communications\| PubMed ID: 27595974	2016
Intrinsic and Extrinsic Stability of Formamidinium Lead Bromide Perovskite Solar Cells Yielding High Photovoltage. Nano letters\| PubMed ID: 27776210	2016
Limits for Recombination in a Low Energy Loss Organic Heterojunction. ACS nano\| PubMed ID: 27809478	2016
Local Versus Long-Range Diffusion Effects of Photoexcited States on Radiative Recombination in Organic-Inorganic Lead Halide Perovskites. Advanced science (Weinheim, Baden-Wurttemberg, Germany)\| PubMed ID: 27980979	2015
Enhancing photoluminescence yields in lead halide perovskites by photon recycling and light out-coupling. Nature communications\| PubMed ID: 28008917	2016
High Open-Circuit Voltages in Tin-Rich Low-Bandgap Perovskite-Based Planar Heterojunction Photovoltaics. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 28066989	2017
Is the Chemical Strategy for Imbuing "Polyene" Character in Diketopyrrolopyrrole-Based Chromophores Sufficient for Singlet Fission? The journal of physical chemistry letters\| PubMed ID: 28112521	2017
Understanding charge transport in lead iodide perovskite thin-film field-effect transistors. Science advances\| PubMed ID: 28138550	2017
Efficient Triplet Exciton Fusion in Molecularly Doped Polymer Light-Emitting Diodes. Advanced materials (Deerfield Beach, Fla.)\| PubMed ID: 28145598	2017
Visualizing excitations at buried heterojunctions in organic semiconductor blends. Nature materials\| PubMed ID: 28218921	2017
A Silicon-Singlet Fission Tandem Solar Cell Exceeding 100% External Quantum Efficiency with High Spectral Stability. ACS energy letters\| PubMed ID: 28261671	2017