Richard H. Friend

181.4k total citations · 74 hit papers
1.1k papers, 151.0k citations indexed

About

Richard H. Friend is a scholar working on Electrical and Electronic Engineering, Polymers and Plastics and Materials Chemistry. According to data from OpenAlex, Richard H. Friend has authored 1.1k papers receiving a total of 151.0k indexed citations (citations by other indexed papers that have themselves been cited), including 957 papers in Electrical and Electronic Engineering, 500 papers in Polymers and Plastics and 356 papers in Materials Chemistry. Recurrent topics in Richard H. Friend's work include Organic Electronics and Photovoltaics (677 papers), Conducting polymers and applications (477 papers) and Organic Light-Emitting Diodes Research (443 papers). Richard H. Friend is often cited by papers focused on Organic Electronics and Photovoltaics (677 papers), Conducting polymers and applications (477 papers) and Organic Light-Emitting Diodes Research (443 papers). Richard H. Friend collaborates with scholars based in United Kingdom, United States and Germany. Richard H. Friend's co-authors include Andrew B. Holmes, Henning Sirringhaus, Donal D. C. Bradley, Neil C. Greenham, J. H. Burroughes, R. N. Marks, Nir Tessler, Paul L. Burn, Adam R. Brown and Aditya Sadhanala and has published in prestigious journals such as Nature, Science and Chemical Reviews.

In The Last Decade

Richard H. Friend

1.1k papers receiving 147.9k citations

Hit Papers

Light-emitting diodes based on conjugated polymers 1987 2026 2000 2013 1990 1999 1999 2014 1995 2.5k 5.0k 7.5k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Light-emitting diodes based on conjugated polymers
    1990 9.7k citations Donal D. C. Bradley, Richard H. Friend et al. Nature profile →
  2. Electroluminescence in conjugated polymers
    1999 5.3k citations Richard H. Friend, Donal D. C. Bradley et al. Nature profile →
  3. Two-dimensional charge transport in self-organized, high-mobility conjugated polymers
    1999 4.0k citations Henning Sirringhaus, Richard H. Friend et al. Nature profile →
  4. Bright light-emitting diodes based on organometal halide perovskite
    2014 3.8k citations Luis Pazos, Henry J. Snaith et al. profile →
  5. Efficient photodiodes from interpenetrating polymer networks
    1995 2.8k citations Neil C. Greenham, Richard H. Friend et al. Nature profile →
  6. High-Resolution Inkjet Printing of All-Polymer Transistor Circuits
    2000 2.8k citations Henning Sirringhaus, Richard H. Friend et al. profile →
  7. Overcoming the electroluminescence efficiency limitations of perovskite light-emitting diodes
    2015 2.6k citations Richard H. Friend et al. profile →
  8. Organic solar cells based on non-fullerene acceptors
    2018 2.5k citations Richard H. Friend, Feng Gao et al. Nature Materials profile →
  9. Integrated Optoelectronic Devices Based on Conjugated Polymers
    1998 2.4k citations Henning Sirringhaus, Richard H. Friend et al. profile →
  10. Self-Organized Discotic Liquid Crystals for High-Efficiency Organic Photovoltaics
    2001 2.1k citations Richard H. Friend et al. profile →
  11. General observation of n-type field-effect behaviour in organic semiconductors
    2005 2.0k citations Henning Sirringhaus, Richard H. Friend et al. Nature profile →
  12. An improved experimental determination of external photoluminescence quantum efficiency
    1997 1.8k citations Richard H. Friend et al. Advanced Materials profile →
  13. High Photoluminescence Efficiency and Optically Pumped Lasing in Solution-Processed Mixed Halide Perovskite Semiconductors
    2014 1.5k citations Samuel D. Stranks, Henry J. Snaith et al. profile →
  14. Maximizing and stabilizing luminescence from halide perovskites with potassium passivation
    2018 1.5k citations Mojtaba Abdi‐Jalebi, Zahra Andaji‐Garmaroudi et al. Nature profile →
  15. Efficient light-emitting diodes based on polymers with high electron affinities
    1993 1.5k citations Neil C. Greenham, Donal D. C. Bradley et al. Nature profile →
  16. Metal halide perovskites for light-emitting diodes
    2020 1.2k citations Richard H. Friend, Feng Gao et al. Nature Materials profile →
  17. Laminated fabrication of polymeric photovoltaic diodes
    1998 1.1k citations Richard H. Friend et al. Nature profile →
  18. Lasing from conjugated-polymer microcavities
    1996 1.1k citations Richard H. Friend et al. Nature profile →
  19. Chemically diverse and multifunctional hybrid organic–inorganic perovskites
    2017 1.1k citations Richard H. Friend et al. profile →
  20. The Role of Driving Energy and Delocalized States for Charge Separation in Organic Semiconductors
    2012 991 citations Akshay Rao, David Beljonne et al. profile →
  21. Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystals
    2016 861 citations Tom C. Jellicoe, Maxim Tabachnyk et al. Journal of the American Chemical Society profile →
  22. Work Functions and Surface Functional Groups of Multiwall Carbon Nanotubes
    1999 854 citations Richard H. Friend et al. profile →
  23. Ultrasmooth organic–inorganic perovskite thin-film formation and crystallization for efficient planar heterojunction solar cells
    2015 841 citations Maximilian T. Hörantner, Samuel D. Stranks et al. profile →
  24. Role of Intermolecular Coupling in the Photophysics of Disordered Organic Semiconductors: Aggregate Emission in Regioregular Polythiophene
    2007 828 citations Richard H. Friend et al. profile →
  25. Effect of interchain interactions on the absorption and emission of poly(3-hexylthiophene)
    2003 824 citations Henning Sirringhaus, Richard H. Friend et al. profile →
  26. Highly Efficient Perovskite Nanocrystal Light‐Emitting Diodes Enabled by a Universal Crosslinking Method
    2016 812 citations Guangru Li, Tom C. Jellicoe et al. Advanced Materials profile →
  27. Perovskites for Next-Generation Optical Sources
    2019 798 citations Richard H. Friend et al. profile →
  28. Ultrafast Long-Range Charge Separation in Organic Semiconductor Photovoltaic Diodes
    2013 787 citations Akshay Rao, Richard H. Friend et al. profile →
  29. High-efficiency perovskite–polymer bulk heterostructure light-emitting diodes
    2018 772 citations Ravichandran Shivanna, Linjie Dai et al. profile →
  30. Measurement of absolute photoluminescence quantum efficiencies in conjugated polymers
    1995 722 citations Neil C. Greenham, Richard H. Friend et al. profile →
  31. Molecular-scale interface engineering for polymer light-emitting diodes
    2000 694 citations Richard H. Friend et al. Nature profile →
  32. Ligand-engineered bandgap stability in mixed-halide perovskite LEDs
    2021 691 citations Yasser A. Hassan, Jong Hyun Park et al. Nature profile →
  33. Mobility enhancement in conjugated polymer field-effect transistors through chain alignment in a liquid-crystalline phase
    2000 679 citations Henning Sirringhaus, Richard H. Friend et al. profile →
  34. Enhanced optoelectronic quality of perovskite thin films with hypophosphorous acid for planar heterojunction solar cells
    2015 677 citations Nobuya Sakai, Nakita K. Noel et al. profile →
  35. Exciton diffusion and dissociation in a poly(p-phenylenevinylene)/C60 heterojunction photovoltaic cell
    1996 663 citations Richard H. Friend et al. profile →
  36. Interfacial Control Toward Efficient and Low‐Voltage Perovskite Light‐Emitting Diodes
    2015 642 citations Richard H. Friend et al. Advanced Materials profile →
  37. Electronic properties of intercalation complexes of the transition metal dichalcogenides
    1987 633 citations Richard H. Friend et al. profile →
  38. Highly efficient luminescence from space-confined charge-transfer emitters
    2020 632 citations Richard H. Friend et al. Nature Materials profile →
  39. Efficient radical-based light-emitting diodes with doublet emission
    2018 625 citations Emrys W. Evans, Richard H. Friend et al. Nature profile →
  40. Chemical tuning of electroluminescent copolymers to improve emission efficiencies and allow patterning
    1992 616 citations Donal D. C. Bradley, Richard H. Friend et al. Nature profile →
  41. Heterojunction Modification for Highly Efficient Organic–Inorganic Perovskite Solar Cells
    2014 612 citations Samuel D. Stranks, Richard H. Friend et al. profile →
  42. Efficient Light-Emitting Diodes Based on Nanocrystalline Perovskite in a Dielectric Polymer Matrix
    2015 612 citations Guangru Li, Richard H. Friend et al. profile →
  43. Photon recycling in lead iodide perovskite solar cells
    2016 597 citations Luis Pazos, Mojtaba Abdi‐Jalebi et al. profile →
  44. Efficient Visible Quasi‐2D Perovskite Light‐Emitting Diodes
    2016 590 citations Richard H. Friend et al. Advanced Materials profile →
  45. Poly(p-phenylenevinylene) light-emitting diodes: Enhanced electroluminescent efficiency through charge carrier confinement
    1992 559 citations Donal D. C. Bradley, Richard H. Friend et al. profile →
  46. Composites of Carbon Nanotubes and Conjugated Polymers for Photovoltaic Devices
    1999 558 citations Richard H. Friend et al. Advanced Materials profile →
  47. Efficient blue light-emitting diodes based on quantum-confined bromide perovskite nanostructures
    2019 547 citations Richard H. Friend et al. profile →
  48. Hot-carrier cooling and photoinduced refractive index changes in organic–inorganic lead halide perovskites
    2015 542 citations Tom C. Jellicoe, Katharina Broch et al. profile →
  49. New semiconductor device physics in polymer diodes and transistors
    1988 534 citations Richard H. Friend et al. Nature profile →
  50. Defect-Assisted Photoinduced Halide Segregation in Mixed-Halide Perovskite Thin Films
    2017 533 citations Satyaprasad P. Senanayak, Andrew J. Pearson et al. ACS Energy Letters profile →
  51. Indium–tin oxide treatments for single- and double-layer polymeric light-emitting diodes: The relation between the anode physical, chemical, and morphological properties and the device performance
    1998 516 citations Richard H. Friend, W. James Feast et al. profile →
  52. Understanding Energy Loss in Organic Solar Cells: Toward a New Efficiency Regime
    2017 508 citations Richard H. Friend et al. profile →
  53. Angular Dependence of the Emission from a Conjugated Polymer Light‐Emitting Diode: Implications for efficiency calculations
    1994 506 citations Neil C. Greenham, Richard H. Friend et al. Advanced Materials profile →
  54. High-performance light-emitting diodes based on carbene-metal-amides
    2017 502 citations Alexander S. Romanov, Richard H. Friend et al. profile →
  55. Self-Aligned, Vertical-Channel, Polymer Field-Effect Transistors
    2003 487 citations Richard H. Friend, Henning Sirringhaus et al. profile →
  56. The role of spin in the kinetic control of recombination in organic photovoltaics
    2013 483 citations Akshay Rao, Philip C. Y. Chow et al. Nature profile →
  57. Blue-Green Color Tunable Solution Processable Organolead Chloride–Bromide Mixed Halide Perovskites for Optoelectronic Applications
    2015 478 citations Robert L. Z. Hoye, Richard H. Friend et al. profile →
  58. Fast spin-flip enables efficient and stable organic electroluminescence from charge-transfer states
    2020 459 citations Emrys W. Evans, William K. Myers et al. profile →
  59. Enhancing photoluminescence yields in lead halide perovskites by photon recycling and light out-coupling
    2016 453 citations Mojtaba Abdi‐Jalebi, Luis Pazos et al. profile →
  60. Singlet exciton fission in solution
    2013 449 citations Andrew J. Musser, David Beljonne et al. profile →
  61. Optical properties and limiting photocurrent of thin-film perovskite solar cells
    2014 447 citations Samuel D. Stranks, Maximilian T. Hörantner et al. Energy & Environmental Science profile →
  62. Giant broadband nonlinear optical absorption response in dispersed graphene single sheets
    2011 412 citations Richard H. Friend et al. profile →
  63. Mixed halide perovskites for spectrally stable and high-efficiency blue light-emitting diodes
    2021 411 citations Richard H. Friend, Feng Gao et al. profile →
  64. A transferable model for singlet-fission kinetics
    2014 399 citations Akshay Rao, Richard H. Friend et al. profile →
  65. Preparation of Single-Phase Films of CH3NH3Pb(I1–xBrx)3 with Sharp Optical Band Edges
    2014 392 citations Richard H. Friend et al. profile →
  66. Understanding charge transport in lead iodide perovskite thin-film field-effect transistors
    2017 384 citations Satyaprasad P. Senanayak, Richard H. Friend et al. Science Advances profile →
  67. Minimising efficiency roll-off in high-brightness perovskite light-emitting diodes
    2018 357 citations Feng Gao, Richard H. Friend et al. profile →
  68. The role of charge recombination to triplet excitons in organic solar cells
    2021 350 citations Giacomo Londi, William K. Myers et al. Nature profile →
  69. Interchain vs. intrachain energy transfer in acceptor-capped conjugated polymers
    2002 347 citations David Beljonne, Richard H. Friend et al. profile →
  70. A roadmap for the commercialization of perovskite light emitters
    2022 305 citations Richard H. Friend et al. profile →
  71. Floating perovskite-BiVO4 devices for scalable solar fuel production
    2022 219 citations Robert L. Z. Hoye, Judith L. MacManus‐Driscoll et al. Nature profile →
  72. Fabrication of red-emitting perovskite LEDs by stabilizing their octahedral structure
    2024 173 citations Linjie Dai, Changsoon Cho et al. Nature profile →
  73. Reversible spin-optical interface in luminescent organic radicals
    2023 118 citations Sebastian Gorgon, Jeannine Grüne et al. Nature profile →
  74. Dynamic two-dimensional covalent organic frameworks
    2024 84 citations Richard H. Friend et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Richard H. Friend United Kingdom 180 127.4k 63.7k 62.4k 13.7k 12.1k 1.1k 151.0k
Jean‐Luc Brédas United States 138 62.4k 0.5× 35.9k 0.6× 33.9k 0.5× 10.8k 0.8× 11.2k 0.9× 1.0k 91.3k
Alan J. Heeger United States 167 99.1k 0.8× 29.7k 0.5× 80.8k 1.3× 15.5k 1.1× 17.4k 1.4× 904 134.2k
Stephen R. Forrest United States 139 81.7k 0.6× 37.5k 0.6× 30.6k 0.5× 9.9k 0.7× 8.4k 0.7× 770 93.0k
Alex K.‐Y. Jen United States 149 67.9k 0.5× 28.5k 0.4× 43.3k 0.7× 6.7k 0.5× 8.0k 0.7× 1.1k 83.5k
Kläus Müllen Germany 175 75.2k 0.6× 80.3k 1.3× 28.1k 0.5× 14.0k 1.0× 29.0k 2.4× 2.1k 154.1k
Tobin J. Marks United States 159 53.7k 0.4× 39.3k 0.6× 28.6k 0.5× 6.0k 0.4× 12.1k 1.0× 1.3k 109.9k
Daoben Zhu China 130 39.3k 0.3× 43.8k 0.7× 21.8k 0.3× 3.4k 0.2× 16.3k 1.3× 1.1k 83.8k
Seth R. Marder United States 111 27.4k 0.2× 26.9k 0.4× 15.9k 0.3× 6.1k 0.4× 15.0k 1.2× 714 58.3k
Thomas P. Russell United States 142 30.9k 0.2× 41.6k 0.7× 28.7k 0.5× 5.5k 0.4× 13.4k 1.1× 1.0k 79.4k
Mark E. Thompson United States 120 54.1k 0.4× 36.7k 0.6× 17.2k 0.3× 2.4k 0.2× 4.3k 0.4× 440 68.3k

Countries citing papers authored by Richard H. Friend

Since Specialization
Citations

This map shows the geographic impact of Richard H. Friend's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Richard H. Friend with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Richard H. Friend more than expected).

Fields of papers citing papers by Richard H. Friend

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Richard H. Friend. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Richard H. Friend. The network helps show where Richard H. Friend may publish in the future.

Co-authorship network of co-authors of Richard H. Friend

This figure shows the co-authorship network connecting the top 25 collaborators of Richard H. Friend. A scholar is included among the top collaborators of Richard H. Friend based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Richard H. Friend. Richard H. Friend is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Kim, Jihun, Eui Dae Jung, Jeongjae Lee, et al.. (2025). Perovskites for next-generation colour conversion displays. Nature Electronics. 8(10). 886–894. 2 indexed citations
2.
Yu, Craig P., Rituparno Chowdhury, Yao Fu, et al.. (2024). Near-infrared luminescent open-shell π-conjugated systems with a bright lowest-energy zwitterionic singlet excited state. Science Advances. 10(30). eado3476–eado3476. 22 indexed citations
3.
Gray, Victor, Daniel T. W. Toolan, Simon Dowland, et al.. (2024). Ligand-Directed Self-Assembly of Organic-Semiconductor/Quantum-Dot Blend Films Enables Efficient Triplet Exciton-Photon Conversion. Journal of the American Chemical Society. 146(11). 7763–7770. 11 indexed citations
4.
Gorgon, Sebastian, Jeannine Grüne, Bluebell H. Drummond, et al.. (2023). Reversible spin-optical interface in luminescent organic radicals. Nature. 620(7974). 538–544. 118 indexed citations breakdown →
5.
Kilbride, Rachel C., Anthony J. Ryan, Michael P. Weir, et al.. (2023). The Self-Assembly of Organic Semiconductor : Quantum Dot Blend Films for Solar Energy Harvesting. 1 indexed citations
6.
Senanayak, Satyaprasad P., Krishanu Dey, Ravichandran Shivanna, et al.. (2023). Charge transport in mixed metal halide perovskite semiconductors. Nature Materials. 22(2). 216–224. 103 indexed citations
7.
Budden, Peter, Kealan J. Fallon, Cara N. Gannett, et al.. (2023). Re‐Thinking Dimer Design Principles with Indolonaphthyridine Intramolecular Singlet Fission. Chemistry - A European Journal. 29(61). e202301547–e202301547. 2 indexed citations
8.
Congrave, Daniel G., Bluebell H. Drummond, Qinying Gu, et al.. (2022). A solution-processable near-infrared thermally activated delayed fluorescent dye with a fused aromatic acceptor and aggregation induced emission behavior. Journal of Materials Chemistry C. 10(12). 4831–4836. 20 indexed citations
9.
Senanayak, Satyaprasad P., Linjie Dai, Gunnar Kusch, et al.. (2021). Understanding the Role of Grain Boundaries on Charge‐Carrier and Ion Transport in Cs2AgBiBr6 Thin Films. Advanced Functional Materials. 31(49). 62 indexed citations
10.
Greenfield, Jake L., Daniele Di Nuzzo, Emrys W. Evans, et al.. (2021). Electrically Induced Mixed Valence Increases the Conductivity of Copper Helical Metallopolymers. Advanced Materials. 33(24). e2100403–e2100403. 23 indexed citations
11.
Hassan, Yasser A., Olivia J. Ashton, Jong Hyun Park, et al.. (2019). Facile Synthesis of Stable and Highly Luminescent Methylammonium Lead Halide Nanocrystals for Efficient Light Emitting Devices. Journal of the American Chemical Society. 141(3). 1269–1279. 113 indexed citations
12.
Ha, Su Ryong, Woo Hyeon Jeong, Yanliang Liu, et al.. (2019). Molecular aggregation method for perovskite–fullerene bulk heterostructure solar cells. Journal of Materials Chemistry A. 8(3). 1326–1334. 18 indexed citations
13.
Hassan, Muhammad, et al.. (2018). Energy Landscape of Vertically Anisotropic Polymer Blend Films toward Highly Efficient Polymer Light‐Emitting Diodes (PLEDs). Advanced Functional Materials. 28(8). 2 indexed citations
14.
Chen, Shangshang, Yuming Wang, Lin Zhang, et al.. (2018). Efficient Nonfullerene Organic Solar Cells with Small Driving Forces for Both Hole and Electron Transfer. Advanced Materials. 30(45). e1804215–e1804215. 175 indexed citations
15.
Abdi‐Jalebi, Mojtaba, Zahra Andaji‐Garmaroudi, Andrew J. Pearson, et al.. (2018). Potassium- and Rubidium-Passivated Alloyed Perovskite Films: Optoelectronic Properties and Moisture Stability. ACS Energy Letters. 3(11). 2671–2678. 136 indexed citations
16.
Hasan, Kamran ul, et al.. (2017). Highly Efficient Energy Transfer in Light Emissive Poly(9,9-dioctylfluorene) and Poly(p-phenylenevinylene) Blend System. ACS Photonics. 5(2). 607–613. 13 indexed citations
17.
Alsari, Mejd, Oier Bikondoa, J. Bishop, et al.. (2017). In situ simultaneous photovoltaic and structural evolution of perovskite solar cells during film formation. Energy & Environmental Science. 11(2). 383–393. 75 indexed citations
18.
Tabachnyk, Maxim, Katharina Broch, Luis Pazos, et al.. (2016). Efficient singlet exciton fission in pentacene prepared from a soluble precursor. APL Materials. 4(11). 12 indexed citations
19.
Friend, Richard H.. (1995). Electroluminescence from conjugated polymers. TuA.1–TuA.1. 3 indexed citations
20.
Friend, Richard H., David Bott, Donal D. C. Bradley, et al.. (1985). Electronic properties of conjugated polymers. Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences. 314(1528). 37–49. 26 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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