Obadiah Reid

Research Professor


Obadiah Reid earned a PhD in Physical Chemistry from the University of Washington in 2010. While at UW, he worked under the guidance of Prof. David Ginger studying the optoelectronic properties of nanostructured organic photovoltaic composites. He contributed to the development and application of photoconductive atomic force microscopy (pcAFM), a unique tool for mapping local photocurrent collection in solar cells with nanoscale resolution. He also developed numerical models to describe conductive and photoconductive AFM experiments, resulting in quantitative local measurements of charge carrier mobility made using conductive AFM, and a method for measuring the local vertical composition in organic photovoltaic composites using pcAFM. His research interests include charge generation, transport, and recombination processes in organic semiconductors; development of new analytical tools and methods; and the convergent application of experimental and theoretical approaches.

Research Interests

Application of time-resolved microwave conductivity (TRMC) measurements to study charge generation and recombination in organic photovoltaic composites

Improvement and construction of a new TRMC instrumentation

Development of radiolysis excitation methods for TRMC measurements.


Ph.D. Chemistry, University of Washington

B.S. Chemistry, Pacific University

Featured Work

Yang, M.; Li, Z.; Reese, M. O.; Reid, O. G.; Kim, D. H.; Siol, S. Perovskite Ink with Wide Processing Window for Scalable High-Efficiency Solar Cells. Nature Energy 2017, 2, 17038.

Dolgopolova, E. A.; Brandt, A. J.; Ejegbavwo, O. Electronic Properties of Bimetallic Metal-Organic Frameworks (MOFs): Tailoring Density of Electronic States Through MOF Modularity. J. Am. Chem. Soc. 2017, 139, 5201–5209.

Larson, B. W.; Reid, O. G.; Coffey, D. C.; Avdoshenko, S. M.; Popov, A. A.; Boltalina, O. V.; Strauss, S. H.; Kopidakis, N.; Rumbles, G. Inter‐Fullerene Electronic Coupling Controls the Efficiency of Photoinduced Charge Generation in Organic Bulk Heterojunctions. Adv. Energy Mater. 2016, 1601427.

Nayak, P. K.; Moore, D. T.; Wenger, B.; Nayak, S.; Haghighirad, A. A.; Fineberg, A.; Noel, N. K.; Reid, O. G.; Rumbles, G.; Kukura, P.; et al. Mechanism for Rapid Growth of Organic–Inorganic Halide Perovskite Crystals. Nature Communications 2016, 7, 13303.

Hughes, B. K.; Braunecker, W. A.; Bobela, D. C.; Nanayakkara, S. U.; Reid, O. G.; Johnson, J. C. Covalently Bound Nitroxyl Radicals in an Organic Framework. J. Phys. Chem. Lett. 2016, 7, 3660–3665.

Reid, O. G.; Yang, M.; Kopidakis, N.; Zhu, K.; Rumbles, G. Grain-Size-Limited Mobility in Methylammonium Lead Iodide Perovskite Thin Films. ACS Energy Lett. 2016, 1, 561–565.

Dowgiallo, A.-M.; Mistry, K. S.; Johnson, J. C.; Reid, O. G.; Blackburn, J. L. Probing Exciton Diffusion and Dissociation in Single-Walled Carbon Nanotube-C60 Heterojunctions. J. Phys. Chem. Lett. 2016, 7, 1794–1799.

Ihly, R.; Mistry, K. S.; Ferguson, A. J.; Clikeman, T. T.; Larson, B. W.; Reid, O. G.; Boltalina, O. V.; Strauss, S. H.; Rumbles, G.; Blackburn, J. L. Tuning the Driving Force for Exciton Dissociation in Single-Walled Carbon Nanotube Heterojunctions. Nat. Chem. 2016, 8, 603–609.

Ihly, R.; Dowgiallo, A.-M.; Yang, M.; Schulz, P.; Stanton, N. J.; Reid, O. G.; Ferguson, A. J.; Zhu, K.; Berry, J. J.; Blackburn, J. L. Efficient Charge Extraction and Slow Recombination in Organic–Inorganic Perovskites Capped with Semiconducting Single-Walled Carbon Nanotubes. Energy Environ. Sci. 2016, 9, 1439–1449.

Feier, H. M.; Reid, O. G.; Pace, N. A.; Park, J.; Bergkamp, J. J.; Sellinger, A.; Gust, D.; Rumbles, G. Local Intermolecular Order Controls Photoinduced Charge Separation at Donor/Acceptor Interfaces in Organic Semiconductors. Adv. Energy Mater. 2016, 6, 1502176.

Reid, O. G.; Rumbles, G. Resonance Energy Transfer Enables Efficient Planar Heterojunction Organic Solar Cells. J. Phys. Chem. C 2015, 120, 87–97.

Crisp, R. W.; Callahan, R.; Reid, O. G.; Dolzhnikov, D. S.; Talapin, D. V.; Rumbles, G.; Luther, J. M.; Kopidakis, N. Photoconductivity of CdTe Nanocrystal-Based Thin Films: Te 2–Ligands Lead to Charge Carrier Diffusion Lengths Over 2 Μm. J. Phys. Chem. Lett. 2015, 6, 4815–4821.

Ferguson, A. J.; Dowgiallo, A.-M.; Bindl, D. J.; Mistry, K. S.; Reid, O. G.; Kopidakis, N.; Arnold, M. S.; Blackburn, J. L. Trap-Limited Carrier Recombination in Single-Walled Carbon Nanotube Heterojunctions with Fullerene Acceptor Layers. Phys. Rev. B 2015, 91, 245311.

Park, J.; Reid, O. G.; Rumbles, G. Photoinduced Carrier Generation and Recombination Dynamics of a Trilayer Cascade Heterojunction Composed of Poly(3-Hexylthiophene), Titanyl Phthalocyanine, and C 60. J. Phys. Chem. B 2015, 119, 7729–7739.

Park, J.; Reid, O. G.; Blackburn, J. L.; Rumbles, G. Photoinduced Spontaneous Free-Carrier Generation in Semiconducting Single-Walled Carbon Nanotubes. Nat. Comm. 2015, 6, 1–8.

OConnor, B. T.; Reid, O. G.; Zhang, X.; Kline, R. J.; Richter, L. J.; Gundlach, D. J.; DeLongchamp, D. M.; Toney, M. F.; Kopidakis, N.; Rumbles, G. Morphological Origin of Charge Transport Anisotropy in Aligned Polythiophene Thin Films. Adv. Funct. Mater. 2014, 24, 3422–3431.

Marsh, H. S.; Reid, O. G.; Barnes, G.; Heeney, M.; Stingelin, N.; Rumbles, G. Control of Polythiophene Film Microstructure and Charge Carrier Dynamics Through Crystallization Temperature. J. Polym. Sci. B Polym. Phys. 2014, 52, 700–707.

Buchaca-Domingo, E.; Ferguson, A. J.; Jameison, F. C.; McCarthy-Ward, T.; Shoaee, S.; Reid, O. G.; Madec, M.-B.; Pfannmöller, M.; Hermerschmidt, F.; Schröder, R. R.; et al. Additive-Assisted Supramolecular Manipulation of Polymer:Fullerene Blend Phase Morphologies and Its Influence on Photophysical Processes. Materials Horizons 2014, 1, 270–279.

Reid, O. G.; Pensack, R. D.; Song, Y.; Scholes, G. D.; Rumbles, G. Charge Photogeneration in Neat Conjugated Polymers. Chem. Mater. 2013, 26, 561–575.

Reid, O. G.; Rumbles, G. Quantitative Transient Absorption Measurements of Polaron Yield and Absorption Coefficient in Neat Conjugated Polymers. J. Phys. Chem. Lett. 2013, 4, 2348–2355.

Treat, N. D.; Nekuda Malik, J. A.; Reid, O. G.; Yu, L.; Shuttle, C. G.; Rumbles, G.; Hawker, C. J.; Chabinyc, M. L.; smith, P.; Stingelin, N. Microstructure Formation in Molecular and Polymer Semiconductors Assisted by Nucleation Agents. Nat. Mater. 2013, 12, 628–633.

Ruddy, D. A.; Reid, O. G.; Leonard, B. M.; Pylypenko, S.; Neale, N. R. Non-Aqueous Thermolytic Route to Oxynitride Photomaterials Using Molecular Precursors Ti(OtBu)4 and NMo(OtBu)3. J. Mater. Chem. A 2013, 1, 14066–14070.

Reid, O. G.; Malik, J. A. N.; Latini, G.; Dayal, S.; Kopidakis, N.; Silva, C.; Stingelin, N.; Rumbles, G. The Influence of Solid‐State Microstructure on the Origin and Yield of Long‐Lived Photogenerated Charge in Neat Semiconducting Polymers. J. Polym. Sci. B Polym. Phys. 2012, 50, 27–37.

Giridharagopal, R.; Rayermann, G. E.; Shao, G.; Moore, D. T.; Reid, O. G.; Tillack, A. F.; Masiello, D. J.; Ginger, D. S. Submicrosecond Time Resolution Atomic Force Microscopy for Probing Nanoscale Dynamics. Nano Lett. 2012, 12, 893–898.

Reid, O. G.; Xin, H.; Jenekhe, S. A.; Ginger, D. S. Nanostructure Determines the Intensity-Dependence of Open-Circuit Voltage in Plastic Solar Cells. J. Appl. Phys. 2010, 108, 084320.

Reid, O. G.; Rayermann, G. E.; Coffey, D. C.; Ginger, D. S. Imaging Local Trap Formation in Conjugated Polymer Solar Cells: A Comparison of Time-Resolved Electrostatic Force Microscopy and Scanning Kelvin Probe Imaging. J. Phys. Chem. C 2010, 114, 20672–20677.

Groves, C.; Reid, O. G.; Ginger, D. S. Heterogeneity in Polymer Solar Cells: Local Morphology and Performance in Organic Photovoltaics Studied with Scanning Probe Microscopy. Accounts Chem. Res. 2010, 43, 612–620.

Rodovsky, D. B.; Reid, O. G.; Pingree, L. S. C.; Ginger, D. S. Concerted Emission and Local Potentiometry of Light-Emitting Electrochemical Cells. ACS Nano 2010, 4, 2673–2680.

Xin, H.; Reid, O. G.; Ren, G.; Kim, F. S.; Ginger, D. S.; Jenekhe, S. A. Polymer Nanowire/Fullerene Bulk Heterojunction Solar Cells: How Nanostructure Determines Photovoltaic Properties. ACS Nano 2010, 4, 1861–1872.

Pingree, L. S. C.; Reid, O. G.; Ginger, D. S. Electrical Scanning Probe Microscopy on Active Organic Electronic Devices. Adv. Mater. 2009, 21, 19–28.

Pingree, L. S. C.; Reid, O. G.; Ginger, D. S. Imaging the Evolution of Nanoscale Photocurrent Collection and Transport Networks During Annealing of Polythiophene/Fullerene Solar Cells. Nano Lett. 2009, 9, 2946–2952.

Reid, O. G.; Munechika, K.; Ginger, D. S. Space Charge Limited Current Measurements on Conjugated Polymer Films Using Conductive Atomic Force Microscopy. Nano Lett. 2008, 8, 1602–1609.

Coffey, D. C.; Reid, O. G.; Rodovsky, D. B.; Bartholomew, G. P.; Ginger, D. S. Mapping Local Photocurrents in Polymer/Fullerene Solar Cells with Photoconductive Atomic Force Microscopy. Nano Lett. 2007, 7, 738–744.

Reid, O. G.; Johnson, K. Effects of Ph on Structure in Acid and Base Terminated Thioaromatic Self-Assembled Monolayers on Gold Substrates. Abstr Pap Am Chem S 2004, 227, U483–U483.