Organic Materials for Biohybrid Photocatalysis and Photoelectrochemical Devices Mariia V. Pavliuk, Bin Cai, Larissa Kurth, Reiner Sebastian Sprick, Gustav Berggren, Haining Tian Chemical Reviews, 2026 The integration of biological catalysts with organic light-harvesting materials represents a rapidly advancing strategy for sustainable solar-to-chemical energy conversion. Recent advances demonstrate that photoexcited organic materials can effectively activate redox enzymes and whole-cell systems to catalyze fuel-forming reactions such as H2 evolution and CO2 fixation as well as selective oxidations and chiral transformations under mild conditions. This review summarizes recent advances in semiartificial photosynthesis driven by organic materials and presents a systematic overview of the major classes involved. In particular, it focuses on a) organic photosensitizers including molecular organic photosensitizers, carbon dots, graphene, carbon nitride, and organic aggregation nanoparticles (e.g., polymer dots/Pdots, molecule nanoparticles) as well as b) organic redox mediators. These materials are evaluated in terms of their photophysical properties, compatibility with biocatalysts, and their roles in photoinduced charge generation, charge separation, and interfacial electron transfer between abiotic and biotic components. Emerging trends toward mediator-free and water-driven systems, challenges related to photostability, biocompatibility, as well as paired redox catalysis generating value-added products are also discussed. Additionally, the effects of the sacrificial electron donor on biohybrid performance and development of biohybrid photoelectrochemical catalysis have been evaluated. Finally, this review aims to highlight the key scientific and technological questions that must be addressed to advance the field toward efficient, scalable, and environmentally benign biohybrid photocatalytic and photoelectrochemical platforms.
Backbone Heterojunction Photocatalysts for Efficient Sacrificial Hydrogen Production Richard J. Lyons, Rhys J. Bourhill, Ewan McQueen, Sam D. Harding, Krzysztof Pawlak, Thomas Fellowes, Harry W. Capps, Alexander J. Cowan, Andrew I. Cooper, Adrian M. Gardner, Martijn A. Zwijnenburg, Reiner Sebastian Sprick Advanced Functional Materials, 2026 A common strategy to improve the efficiency of organic photocatalysts for hydrogen production from aqueous mixtures is to create bulk heterojunction nanoparticles comprised of intermixed donor and acceptor phases that allow for efficient charge separation after photoexcitation. However, many of these systems possess poor stability due to aggregation of these nanoparticles under operating conditions. Moreover, the use of surfactants, that inhibit aggregation and promote donor–acceptor phase intermixing, can form an insulating barrier that reduces the photocatalytic efficiency of these nanoparticles. Here, these issues are bypassed by preparing a single‐component organic heterojunction‐type polymer, P40 , in which a molecular donor, pyrene, is tethered to poly(fluorene‐ co ‐dibenzo[ b , d ]thiophene sulfone), a conjugated polymer acceptor. By tethering the donor and acceptor together, phase intermixing is guaranteed without the need for costly post‐synthesis processing or insulating surfactants. Moreover, the influence of pyrene in P40 is determined to be multifaceted, as it influences the dynamics of the excited state, the aggregate microstructure, and the local solvent environment. P40 is found to have an exceptional external quantum efficiency of 38% at 420 nm in the presence of triethylamine as a hole scavenger, the highest value reported for any linear conjugated polymer to date for sacrificial hydrogen production.
Unraveling the mechanisms of charge-separation in a dibenzo[b,d]thiophene sulfone polymer photocatalyst using time-resolved electronic absorption spectroscopy Richard J. Lyons, Ewan McQueen, Rhys J. Bourhill, Owen Thwaites, Andrew I. Cooper, Reiner Sebastian Sprick, Alexander J. Cowan, Adrian M. Gardner Journal of Chemical Physics, 2025 Organic polymer photocatalysts have gained much interest in recent years, largely because of their photocatalytic activity toward sacrificial hydrogen production from water. Time-resolved electronic absorption spectroscopy is commonly employed to understand the photophysical processes occurring following photon absorption, which in turn is used to rationalize photocatalytic activities. The homopolymer of dibenzo[b,d]thiophene sulfone (P10) is a well-studied and high performing photocatalyst for sacrificial hydrogen evolution from water. While sacrificial reagents are well documented as a prerequisite for this reaction, their roles in the picosecond–nanosecond photodynamics have yet to be determined using transient electronic signatures. By employing lifetime density analysis of time-resolved electronic absorption spectra of P10 in a variety of solvent mixtures, we show that the electron polaron (the required charge for hydrogen evolution) is produced on the 0.5–100 and 50–800 ps timescales via excitonic quenching by triethylamine and methanol, respectively, two common sacrificial electron donors. We conclude that there is significant pre-association of triethylamine with the P10 polymer, resulting in efficient excitonic quenching. This mechanism competes effectively with radiative excitonic relaxation, which occurs on similar timescales, reducing exciton losses and improving polaron yields.
Organic semiconductors for solar fuel production: Enhance and protect! Ewan McQueen, Reiner Sebastian Sprick Joule, 2025 Recently, Daboczi et al. demonstrated anodes based on bulk heterojunction organic photoactive materials protected by graphite layers and loaded with NiFeOOH as a water oxidation catalyst showing remarkable photocurrent densities of up to 26.4 mA cm −2 at +1.23 V vs. NHE with excellent stability.
Photocatalytic CO2 reduction in aqueous media using a silver-loaded conjugated polymer and a Ru(II)-Ru(II) supramolecular photocatalyst Noritaka Sakakibara, Ewan McQueen, Reiner Sebastian Sprick, Osamu Ishitani Bulletin of the Chemical Society of Japan, 2025 Visible-light-driven conversion of CO2 to useful products is a promising process for a more sustainable energy system in a circular economy. Whilst highly efficient, durable, and selective systems have been reported in organic media, the photocatalytic process performing efficiently in aqueous media is highly desirable for the purpose of its practical application. However, efficiency and selectivity for CO2 reduction versus proton reduction in aqueous solution have proven challenging to date. Herein, this study demonstrates the enablement of highly efficient and durable visible-light-driven photocatalytic CO2 reduction to formate in aqueous media by a hybrid photocatalyst consisting of a silver-loaded conjugated polymer and a binuclear Ru(II) complex. The hybrid photocatalyst exhibited high activity and durability for formate production, with an apparent quantum yield of 4.2% at 460 nm and a turnover number of 38,000 (based on the amount of binuclear complexes adsorbed), both of which are the highest values reported amongst hybrid photocatalysts in aqueous media. Even though the conjugated polymer retains residual amounts of palladium from synthesis (which is an active site for H2 production in aqueous media), the loading of Ag nanoparticles onto the conjugated polymer enhanced the activity and selectivity for photocatalytic CO2 reduction by suppressing H2 production.
Films of linear conjugated polymer as photoanodes for oxidation reactions Shuming Chai, Shun Zhao, Jiaxin Su, Jinshui Zhang, Xiong Chen, Reiner Sebastian Sprick, Yuanxing Fang Chemical Science, 2024 Photoelectrochemical (PEC) devices hold huge potential to convert solar energy into chemical energy.
Non-conventional bulk heterojunction nanoparticle photocatalysts for sacrificial hydrogen evolution from water Jai-Ram Mistry, Ewan McQueen, Fabio Nudelman, Reiner Sebastian Sprick, Iain A. Wright Journal of Materials Chemistry A, 2024 Bulk heterojunction nanoparticles composed of simple electron-donor molecules and an electron-acceptor polymer act as photocatalysts for the generation of hydrogen from water. Performance is dictated by the terminal groups of the donor molecules.
Processing polymer photocatalysts for photocatalytic hydrogen evolution Richard Jack Lyons, Reiner Sebastian Sprick Materials Horizons, 2024 The processing of conjugated organic materials into films, nanoparticles, and nanofibers, presents significant opportunities to increase their activity for photocatalytic hydrogen evolution and for scaled-up systems for real world applications.
Conjugated Polymer/Recombinant Escherichia coli Biohybrid Systems for Photobiocatalytic Hydrogen Production Ying Yang, Martijn A. Zwijnenburg, Adrian M. Gardner, Sylwia Adamczyk, Jing Yang, Yaqi Sun, Qiuyao Jiang, Alexander J. Cowan, Reiner Sebastian Sprick, Lu-Ning Liu, Andrew I. Cooper ACS Nano, 2024 High Resolution Image Download MS PowerPoint Slide Biohybrid photocatalysts are composite materials that combine the efficient light-absorbing properties of synthetic materials with the highly evolved metabolic pathways and self-repair mechanisms of biological systems. Here, we show the potential of conjugated polymers as photosensitizers in biohybrid systems by combining a series of polymer nanoparticles with engineered Escherichia coli cells. Under simulated solar light irradiation, the biohybrid system consisting of fluorene/dibenzo [ b,d ]thiophene sulfone copolymer (LP41) and recombinant E. coli (i.e., a LP41/HydA BL21 biohybrid) shows a sacrificial hydrogen evolution rate of 3.442 mmol g –1 h –1 (normalized to polymer amount). It is over 30 times higher than the polymer photocatalyst alone (0.105 mmol g –1 h –1 ), while no detectable hydrogen was generated from the E. coli cells alone, demonstrating the strong synergy between the polymer nanoparticles and bacterial cells. The differences in the physical interactions between synthetic materials and microorganisms, as well as redox energy level alignment, elucidate the trends in photochemical activity. Our results suggest that organic semiconductors may offer advantages, such as solution processability, low toxicity, and more tunable surface interactions with the biological components over inorganic materials.
Time-Resolved Raman Spectroscopy of Polaron Formation in a Polymer Photocatalyst Verity L. Piercy, Khezar H. Saeed, Andrew W. Prentice, Gaia Neri, Chao Li, Adrian M. Gardner, Yang Bai, Reiner Sebastian Sprick, Igor V. Sazanovich, Andrew I. Cooper, Matthew J. Rosseinsky, Martijn A. Zwijnenburg, Alexander J. Cowan Journal of Physical Chemistry Letters, 2021
A mobile robotic chemist Benjamin Burger, Phillip M. Maffettone, Vladimir V. Gusev, Catherine M. Aitchison, Yang Bai, Xiaoyan Wang, Xiaobo Li, Ben M. Alston, Buyi Li, Rob Clowes, Nicola Rankin, Brandon Harris, Reiner Sebastian Sprick, Andrew I. Cooper Nature, 2020
Polymer photocatalysts with plasma-enhanced activity Reiner Sebastian Sprick, Kieran J. Cheetham, Yang Bai, Jesum Alves Fernandes, Michael Barnes, James W. Bradley, Andrew I. Cooper Journal of Materials Chemistry A, 2020
A stable covalent organic framework for photocatalytic carbon dioxide reduction Zhiwei Fu, Xiaoyan Wang, Adrian M. Gardner, Xue Wang, Samantha Y. Chong, Gaia Neri, Alexander J. Cowan, Lunjie Liu, Xiaobo Li, Anastasia Vogel, Rob Clowes, Matthew Bilton, Linjiang Chen, Reiner Sebastian Sprick, Andrew I. Cooper Chemical Science, 2020
Photocatalytically active ladder polymers Anastasia Vogel, Mark Forster, Liam Wilbraham, Charlotte L. Smith, Alexander J. Cowan, Martijn A. Zwijnenburg, Reiner Sebastian Sprick, Andrew I. Cooper Faraday Discussions, 2019
Demonstrator devices for artificial photosynthesis: General discussion Ryu Abe, Catherine M. Aitchison, Virgil Andrei, Matthias Beller, Daniel Cheung, Charles E. Creissen, Víctor A. de la Peña O’Shea, James R. Durrant, Michael Grätzel, Leif Hammarström, Sophia Haussener, Su-Il In, Evangelos Kalamaras, Akihiko Kudo, Moritz F. Kuehnel, Pramod Patil Kunturu, Yi-Hsuan Lai, Chong-Yong Lee, Marcelino Maneiro, Esther Edwardes Moore, Huu Chuong Nguyen, Aubrey R. Paris, Chanon Pornrungroj, Joost N. H. Reek, Erwin Reisner, Murielle Schreck, Wilson A. Smith, Han Sen Soo, Reiner Sebastian Sprick, Anirudh Venugopal, Qian Wang, Dominik Wielend, Martijn A. Zwijnenburg Faraday Discussions, 2019
Synthetic approaches to artificial photosynthesis: General discussion Catherine M. Aitchison, Virgil Andrei, Daniel Antón-García, Ulf-Peter Apfel, Vivek Badiani, Matthias Beller, Andrew B. Bocarsly, Sylvestre Bonnet, Peter Brueggeller, Christine A. Caputo, Flavia Cassiola, Simon T. Clausing, Andrew I. Cooper, Charles E. Creissen, Víctor A. de la Peña O’Shea, Wolfgang Domcke, James R. Durrant, Michael Grätzel, Leif Hammarström, Anna Hankin, Marta C. Hatzell, Ferdi Karadas, Burkhard König, Moritz F. Kuehnel, Sarah Lamaison, Chia-Yu Lin, Marcelino Maneiro, Shelley D. Minteer, Aubrey R. Paris, Ernest Pastor, Chanon Pornrungroj, Joost N. H. Reek, Erwin Reisner, Souvik Roy, Constantin Sahm, Ravi Shankar, Wendy J. Shaw, Sergii I. Shylin, Wilson A. Smith, Katarzyna Sokol, Han Sen Soo, Reiner Sebastian Sprick, Wolfgang Viertl, Anastasia Vogel, Andreas Wagner, David Wakerley, Qian Wang, Dominik Wielend, Martijn A. Zwijnenburg Faraday Discussions, 2019
Organic Materials for Biohybrid Photocatalysis and Photoelectrochemical Devices MV Pavliuk, B Cai, L Kurth, RS Sprick, G Berggren, H Tian Chemical Reviews , 2026 2026
Backbone heterojunction photocatalysts for efficient sacrificial hydrogen production RJ Lyons, RJ Bourhill, E McQueen, SD Harding, K Pawlak, T Fellowes, ... Advanced Functional Materials 36 (29), e13025 , 2026 2026 Citations: 1
Heteroatom-fused tetraphenylethylene-based conjugated microporous polymers for sacrificial photocatalytic H2O2 production Z Luo, RJ Bourhill, F Zhang, Y Xiong, W Zheng, X Chen, RS Sprick Science China Materials , 2026 2026
Engineering Microbe-Material Interface to produce Solar Chemicals and Fuels from CO2 M Rishan, S Kalathil, RS Sprick, EA Gibson MATSUS Spring 2026 , 2025 2025
Unraveling the mechanisms of charge-separation in a dibenzo [b, d] thiophene sulfone polymer photocatalyst using time-resolved electronic absorption spectroscopy RJ Lyons, E McQueen, RJ Bourhill, O Thwaites, AI Cooper, RS Sprick, ... The Journal of chemical physics 163 (4) , 2025 2025 Citations: 2
Organic semiconductors for solar fuel production: Enhance and protect! E McQueen, RS Sprick Joule 9 (7) , 2025 2025
Photocatalytic CO 2 reduction in aqueous media using a silver-loaded conjugated polymer and a Ru(II)-Ru(II) supramolecular photocatalyst N Sakakibara, E McQueen, RS Sprick, O Ishitani Bulletin of the Chemical Society of Japan 98 (3), uoaf017 , 2025 2025 Citations: 2
Introduction to the metal-free photo/electrocatalysts for sustainable energy solutions themed collection RS Sprick, M Shalom, X Wang Sustainable Energy & Fuels 9 (18), 4773-4774 , 2025 2025
ChemQuest-the education for sustainable development game L Gibson, RS Sprick, P Thomson, D Stevens Variety in Chemistry Education Physics Higher Education Conference , 2024 2024
Conjugated Polymer/Recombinant Escherichia coli Biohybrid Systems for Photobiocatalytic Hydrogen Production Y Yang, MA Zwijnenburg, AM Gardner, S Adamczyk, J Yang, Y Sun, ... ACS nano 18 (21), 13484-13495 , 2024 2024 Citations: 29
Polymer photocatalysts with side chain induced planarity for increased activity for sacrificial hydrogen production from water RJ Lyons, Y Yang, E McQueen, L Luo, AI Cooper, MA Zwijnenburg, ... Advanced Energy Materials 14 (12), 2303680 , 2024 2024 Citations: 40
Visible-light-responsive hybrid photocatalysts for quantitative conversion of CO 2 to highly concentrated formate solutions E McQueen, N Sakakibara, K Kamogawa, MA Zwijnenburg, Y Tamaki, ... Chemical Science 15 (43), 18146-18160 , 2024 2024 Citations: 12
Films of linear conjugated polymer as photoanodes for oxidation reactions S Chai, S Zhao, J Su, J Zhang, X Chen, RS Sprick, Y Fang Chemical Science 15 (37), 15496-15503 , 2024 2024 Citations: 10
Non-conventional bulk heterojunction nanoparticle photocatalysts for sacrificial hydrogen evolution from water JR Mistry, E McQueen, F Nudelman, RS Sprick, IA Wright Journal of Materials Chemistry A 12 (35), 23411-23415 , 2024 2024 Citations: 3
From StrathCEKO to StrathCAN: building a community of climate education ambassadors from the bottom up in a higher education institution S Strachan, W Quirke, RS Sprick, E Gallou, R Collins, S Faulkner 11th Annual International Conference on Sustainable Development , 2023 2023 Citations: 1
Making the connections: physical and electric interactions in biohybrid photosynthetic systems Y Yang, LN Liu, H Tian, AI Cooper, RS Sprick Energy & Environmental Science 16 (10), 4305-4319 , 2023 2023 Citations: 41
Impact of interfaces, and nanostructure on the performance of conjugated polymer photocatalysts for hydrogen production from water E McQueen, Y Bai, RS Sprick Nanomaterials 12 (23), 4299 , 2022 2022 Citations: 13
Why do sulfone-containing polymer photocatalysts work so well for sacrificial hydrogen evolution from water? SAJ Hillman, RS Sprick, D Pearce, DJ Woods, WY Sit, X Shi, AI Cooper, ... Journal of the American Chemical Society 144 (42), 19382-19395 , 2022 2022 Citations: 85
Photocatalytic overall water splitting under visible light enabled by a particulate conjugated polymer loaded with palladium and iridium Y Bai, C Li, L Liu, Y Yamaguchi, M Bahri, H Yang, A Gardner, ... Angewandte Chemie 134 (26), e202201299 , 2022 2022 Citations: 122
MOST CITED SCHOLAR PUBLICATIONS
A mobile robotic chemist B Burger, PM Maffettone, VV Gusev, CM Aitchison, Y Bai, X Wang, X Li, ... Nature 583 (7815), 237-241 , 2020 2020 Citations: 1767
Sulfone-containing covalent organic frameworks for photocatalytic hydrogen evolution from water X Wang, L Chen, SY Chong, MA Little, Y Wu, WH Zhu, R Clowes, Y Yan, ... Nature Chemistry 10 (12), 1180-1189 , 2018 2018 Citations: 1313
Current understanding and challenges of solar-driven hydrogen generation using polymeric photocatalysts Y Wang, A Vogel, M Sachs, RS Sprick, L Wilbraham, SJA Moniz, R Godin, ... Nature Energy 4 (9), 746-760 , 2019 2019 Citations: 989
Tunable organic photocatalysts for visible-light-driven hydrogen evolution RS Sprick, JX Jiang, B Bonillo, S Ren, T Ratvijitvech, P Guiglion, ... Journal of the American Chemical Society 137 (9), 3265-3270 , 2015 2015 Citations: 954
Visible‐light‐driven hydrogen evolution using planarized conjugated polymer photocatalysts RS Sprick, B Bonillo, R Clowes, P Guiglion, NJ Brownbill, BJ Slater, ... Angewandte Chemie International Edition 55 (5), 1792-1796 , 2016 2016 Citations: 593
Reconstructed covalent organic frameworks W Zhang, L Chen, S Dai, C Zhao, C Ma, L Wei, M Zhu, SY Chong, H Yang, ... Nature 604 (7904), 72-79 , 2022 2022 Citations: 558
Accelerated discovery of organic polymer photocatalysts for hydrogen evolution from water through the integration of experiment and theory Y Bai, L Wilbraham, BJ Slater, MA Zwijnenburg, RS Sprick, AI Cooper Journal of the American Chemical Society 141 (22), 9063-9071 , 2019 2019 Citations: 422
A stable covalent organic framework for photocatalytic carbon dioxide reduction Z Fu, X Wang, AM Gardner, X Wang, SY Chong, G Neri, AJ Cowan, L Liu, ... Chemical science 11 (2), 543-550 , 2020 2020 Citations: 397
Understanding structure-activity relationships in linear polymer photocatalysts for hydrogen evolution M Sachs, RS Sprick, D Pearce, SAJ Hillman, A Monti, AAY Guilbert, ... Nature communications 9 (1), 4968 , 2018 2018 Citations: 364
Photocatalytic hydrogen evolution from water using fluorene and dibenzothiophene sulfone-conjugated microporous and linear polymers RS Sprick, Y Bai, AAY Guilbert, M Zbiri, CM Aitchison, L Wilbraham, Y Yan, ... Chemistry of Materials 31 (2), 305-313 , 2018 2018 Citations: 229
Extended conjugated microporous polymers for photocatalytic hydrogen evolution from water RS Sprick, B Bonillo, M Sachs, R Clowes, JR Durrant, DJ Adams, ... Chemical Communications 52 (65), 10008-10011 , 2016 2016 Citations: 216
Structure-property relationships for covalent triazine-based frameworks: The effect of spacer length on photocatalytic hydrogen evolution from water CB Meier, RS Sprick, A Monti, P Guiglion, JSM Lee, MA Zwijnenburg, ... Polymer 126, 283-290 , 2017 2017 Citations: 192
Tracking charge transfer to residual metal clusters in conjugated polymers for photocatalytic hydrogen evolution M Sachs, H Cha, J Kosco, CM Aitchison, L Francàs, S Corby, CL Chiang, ... Journal of the American Chemical Society 142 (34), 14574-14587 , 2020 2020 Citations: 188
A solution‐processable polymer photocatalyst for hydrogen evolution from water DJ Woods, RS Sprick, CL Smith, AJ Cowan, AI Cooper Advanced Energy Materials 7 (22), 1700479 , 2017 2017 Citations: 172
Integrated covalent organic framework/carbon nanotube composite as Li‐ion positive electrode with ultra‐high rate performance H Gao, Q Zhu, AR Neale, M Bahri, X Wang, H Yang, L Liu, R Clowes, ... Advanced Energy Materials 11 (39), 2101880 , 2021 2021 Citations: 169
Rational design of covalent organic frameworks for efficient photocatalytic hydrogen peroxide production S Chai, X Chen, X Zhang, Y Fang, RS Sprick, X Chen Environmental Science: Nano 9 (7), 2464-2469 , 2022 2022 Citations: 155
Side-chain tuning in conjugated polymer photocatalysts for improved hydrogen production from water DJ Woods, SAJ Hillman, D Pearce, L Wilbraham, LQ Flagg, W Duffy, ... Energy & Environmental Science 13 (6), 1843-1855 , 2020 2020 Citations: 145
Structurally diverse covalent triazine-based framework materials for photocatalytic hydrogen evolution from water CB Meier, R Clowes, E Berardo, KE Jelfs, MA Zwijnenburg, RS Sprick, ... Chemistry of Materials 31 (21), 8830-8838 , 2019 2019 Citations: 144
Covalent organic framework nanosheets embedding single cobalt sites for photocatalytic reduction of carbon dioxide X Wang, Z Fu, L Zheng, C Zhao, X Wang, SY Chong, F McBride, R Raval, ... Chemistry of Materials 32 (21), 9107-9114 , 2020 2020 Citations: 141
Reprogramming bacterial protein organelles as a nanoreactor for hydrogen production T Li, Q Jiang, J Huang, CM Aitchison, F Huang, M Yang, GF Dykes, HL He, ... Nature communications 11 (1), 5448 , 2020 2020 Citations: 140