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20052020

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A planar, chip-based, dual-beam refractometer using an integrated organic light-emitting diode (OLED) light source and organic photovoltaic (OPV) detectors

Ratcliff, E. L., Veneman, P. A., Simmonds, A., Zacher, B., Huebner, D., Saavedra, S. S. & Armstrong, N. R., Apr 1 2010, In : Analytical chemistry. 82, 7, p. 2734-2742 9 p.

Research output: Contribution to journalArticle

25 Scopus citations

Built-in potential in conjugated polymer diodes with changing anode work function: Interfacial states and deviation from the schottky-mott limit

MacLeod, B. A., Horwitz, N. E., Ratcliff, E. L., Jenkins, J. L., Armstrong, N. R., Giordano, A. J., Hotchkiss, P. J., Marder, S. R., Campbell, C. T. & Ginger, D. S., May 3 2012, In : Journal of Physical Chemistry Letters. 3, 9, p. 1202-1207 6 p.

Research output: Contribution to journalArticle

40 Scopus citations

Chemically controlled reversible and irreversible extraction barriers Via stable interface modification of zinc oxide electron collection layer in polycarbazole-based organic solar cells

Cowan, S. R., Schulz, P., Giordano, A. J., Garcia, A., Macleod, B. A., Marder, S. R., Kahn, A., Ginley, D. S., Ratcliff, E. L. & Olson, D. C., Aug 6 2014, In : Advanced Functional Materials. 24, 29, p. 4671-4680 10 p.

Research output: Contribution to journalArticle

57 Scopus citations

Colloidal polymerization of polymer-coated ferromagnetic nanoparticles into cobalt oxide nanowires

Keng, P. Y., Kim, B. Y., Shim, I. B., Sahoo, R., Veneman, P. E., Armstrong, N. R., Yoo, H., Pemberton, J. E., Bull, M. M., Griebel, J. J., Ratcliff, E. L., Nebesny, K. G. & Pyun, J., Oct 27 2009, In : ACS Nano. 3, 10, p. 3143-3157 15 p.

Research output: Contribution to journalArticle

138 Scopus citations

Contact-induced mechanisms in organic photovoltaics: A steady-state and transient study

Cowan, S. R., Li, J. V., Olson, D. C. & Ratcliff, E. L., Jan 1 2015, In : Advanced Energy Materials. 5, 1, 1400549.

Research output: Contribution to journalArticle

14 Scopus citations

Controlling the Kinetics of Charge Transfer at Conductive Polymer/Liquid Interfaces through Microstructure

Neelamraju, B., Rudolph, M. & Ratcliff, E. L., Sep 20 2018, In : Journal of Physical Chemistry C. 122, 37, p. 21210-21215 6 p.

Research output: Contribution to journalArticle

7 Scopus citations

Correlation of Coexistent Charge Transfer States in F4TCNQ-Doped P3HT with Microstructure

Neelamraju, B., Watts, K. E., Pemberton, J. E. & Ratcliff, E. L., Dec 6 2018, In : Journal of Physical Chemistry Letters. 9, 23, p. 6871-6877 7 p.

Research output: Contribution to journalArticle

17 Scopus citations

Critical Interface States Controlling Rectification of Ultrathin NiO-ZnO p-n Heterojunctions

Steirer, K. X., Ou, K. L., Armstrong, N. R. & Ratcliff, E. L., Sep 13 2017, In : ACS Applied Materials and Interfaces. 9, 36, p. 31111-31118 8 p.

Research output: Contribution to journalArticle

8 Scopus citations

Deciphering the metal-C60 interface in optoelectronic devices: Evidence for C60 reduction by vapor deposited Al

Matz, D. L., Ratcliff, E. L., Meyer, J., Kahn, A. & Pemberton, J. E., Jul 10 2013, In : ACS Applied Materials and Interfaces. 5, 13, p. 6001-6008 8 p.

Research output: Contribution to journalArticle

18 Scopus citations

Directed electrodeposition of polymer films using spatially controllable electric field gradients

Ratcliff, E. L. & Hillier, A. C., Sep 11 2007, In : Langmuir. 23, 19, p. 9905-9910 6 p.

Research output: Contribution to journalArticle

13 Scopus citations

Electrodeposited, "textured" poly(3-hexyl-thiophene) (e-P3HT) films for photovoltaic applications

Ratcliff, E. L., Jenkins, J. L., Nebesny, K. & Armstrong, N. R., Sep 23 2008, In : Chemistry of Materials. 20, 18, p. 5796-5806 11 p.

Research output: Contribution to journalArticle

74 Scopus citations

Electron-transfer processes in zinc phthalocyanine-phosphonic acid monolayers on ITO: Characterization of orientation and charge-transfer kinetics by waveguide spectroelectrochemistry

Lin, H. C., Polaske, N. W., Oquendo, L. E., Gliboff, M., Knesting, K. M., Nordlund, D., Ginger, D. S., Ratcliff, E. L., Beam, B. M., Armstrong, N. R., McGrath, D. V. & Saavedra, S. S., May 3 2012, In : Journal of Physical Chemistry Letters. 3, 9, p. 1154-1158 5 p.

Research output: Contribution to journalArticle

25 Scopus citations

Energy level alignment and morphology of Ag and Au nanoparticle recombination contacts in tandem planar heterojunction solar cells

Steirer, K. X., Macdonald, G. A., Olthof, S., Gantz, J., Ratcliff, E. L., Kahn, A. & Armstrong, N. R., Oct 31 2013, In : Journal of Physical Chemistry C. 117, 43, p. 22331-22340 10 p.

Research output: Contribution to journalArticle

7 Scopus citations

Energy level alignment in PCDTBT:PC70BM solar cells: Solution processed NiOx for improved hole collection and efficiency

Ratcliff, E. L., Meyer, J., Steirer, K. X., Armstrong, N. R., Olson, D. & Kahn, A., May 2012, In : Organic Electronics. 13, 5, p. 744-749 6 p.

Research output: Contribution to journalArticle

119 Scopus citations

Energy Level Alignment of Molybdenum Oxide on Colloidal Lead Sulfide (PbS) Thin Films for Optoelectronic Devices

Placencia, D., Lee, P., Tischler, J. G. & Ratcliff, E. L., Aug 1 2018, In : ACS Applied Materials and Interfaces. 10, 30, p. 24981-24986 6 p.

Research output: Contribution to journalArticle

1 Scopus citations

Enhanced efficiency in plastic solar cells via energy matched solution processed NiO x interlayers

Steirer, K. X., Ndione, P. F., Widjonarko, N. E., Lloyd, M. T., Meyer, J., Ratcliff, E. L., Kahn, A., Armstrong, N. R., Curtis, C. J., Ginley, D. S., Berry, J. J. & Olson, D. C., Oct 1 2011, In : Advanced Energy Materials. 1, 5, p. 813-820 8 p.

Research output: Contribution to journalArticle

258 Scopus citations

Evidence for near-surface NiOOH species in solution-processed NiO x selective interlayer materials: Impact on energetics and the performance of polymer bulk heterojunction photovoltaics

Ratcliff, E. L., Meyer, J., Steirer, K. X., Garcia, A., Berry, J. J., Ginley, D. S., Olson, D. C., Kahn, A. & Armstrong, N. R., Nov 22 2011, In : Chemistry of Materials. 23, 22, p. 4988-5000 13 p.

Research output: Contribution to journalArticle

223 Scopus citations

Ferrocene functional polymer brushes on indium tin oxide via surface-initiated atom transfer radical polymerization

Kim, B., Ratcliff, E. L., Armstrong, N. R., Kowalewski, T. & Pyun, J., Feb 2 2010, In : Langmuir. 26, 3, p. 2083-2092 10 p.

Research output: Contribution to journalArticle

55 Scopus citations

Formation of interfacial traps upon surface protonation in small molecule solution processed bulk heterojunctions probed by photoelectron spectroscopy

Ratcliff, E. L., Bakus, R. C., Welch, G. C., Van Der Poll, T. S., Garcia, A., Cowan, S. R., MacLeod, B. A., Ginley, D. S., Bazan, G. C. & Olson, D. C., Oct 21 2013, In : Journal of Materials Chemistry C. 1, 39, p. 6223-6234 12 p.

Research output: Contribution to journalArticle

28 Scopus citations

Highly-tunable nickel cobalt oxide as a low-temperature P-type contact in organic photovoltaic devices

Ndione, P. F., Garcia, A., Widjonarko, N. E., Sigdel, A. K., Steirer, K. X., Olson, D. C., Parilla, P. A., Ginley, D. S., Armstong, N. R., Richards, R. E., Ratcliff, E. L. & Berry, J. J., Apr 1 2013, In : Advanced Energy Materials. 3, 4, p. 524-531 8 p.

Research output: Contribution to journalArticle

30 Scopus citations

High-Throughput Experimental Study of Wurtzite Mn 1- x Zn x O Alloys for Water Splitting Applications

Ndione, P. F., Ratcliff, E. L., Dey, S. R., Warren, E. L., Peng, H., Holder, A. M., Lany, S., Gorman, B. P., Al-Jassim, M. M., Deutsch, T. G., Zakutayev, A. & Ginley, D. S., Apr 24 2019, In : ACS Omega. 4, 4, p. 7436-7447 12 p.

Research output: Contribution to journalArticle

Open Access
1 Scopus citations

Impact of self-assembled monolayer design and electrochemical factors onimpedance-based biosensing

Brothers, M. C., Moore, D., Lawrence, M. S., Harris, J., Joseph, R. M., Ratcliff, E., Ruiz, O. N., Glavin, N. & Kim, S. S., Apr 2 2020, In : Sensors (Switzerland). 20, 8, 2246.

Research output: Contribution to journalArticle

Open Access
1 Scopus citations

Improvement of interfacial contacts for new small-molecule bulk-heterojunction organic photovoltaics

Garcia, A., Welch, G. C., Ratcliff, E. L., Ginley, D. S., Bazan, G. C. & Olson, D. C., Oct 9 2012, In : Advanced Materials. 24, 39, p. 5368-5373 6 p.

Research output: Contribution to journalArticle

114 Scopus citations

Influence of backbone fluorination in regioregular poly(3-alkyl-4-fluoro)thiophenes

Fei, Z., Boufflet, P., Wood, S., Wade, J., Moriarty, J., Gann, E., Ratcliff, E. L., Mcneill, C. R., Sirringhaus, H., Kim, J. S. & Heeney, M., Jun 3 2015, In : Journal of the American Chemical Society. 137, 21, p. 6866-6879 14 p.

Research output: Contribution to journalArticle

142 Scopus citations

Influence of molecular orientation on charge-transfer processes at phthalocyanine/metal oxide interfaces and relationship to organic photovoltaic performance

Lin, H. C., MacDonald, G. A., Shi, Y., Polaske, N. W., McGrath, D. V., Marder, S. R., Armstrong, N. R., Ratcliff, E. L. & Saavedra, S. S., May 14 2015, In : Journal of Physical Chemistry C. 119, 19, p. 10304-10313 10 p.

Research output: Contribution to journalArticle

15 Scopus citations

Integrating theory, synthesis, spectroscopy and device efficiency to design and characterize donor materials for organic photovoltaics: A case study including 12 donors

Oosterhout, S. D., Kopidakis, N., Owczarczyk, Z. R., Braunecker, W. A., Larsen, R. E., Ratcliff, E. L. & Olson, D. C., May 14 2015, In : Journal of Materials Chemistry A. 3, 18, p. 9777-9788 12 p.

Research output: Contribution to journalArticle

14 Scopus citations
3 Scopus citations

Investigating the influence of interfacial contact properties on open circuit voltages in organic photovoltaic performance: Work function versus selectivity

Ratcliff, E. L., Garcia, A., Paniagua, S. A., Cowan, S. R., Giordano, A. J., Ginley, D. S., Marder, S. R., Berry, J. J. & Olson, D. C., May 1 2013, In : Advanced Energy Materials. 3, 5, p. 647-656 10 p.

Research output: Contribution to journalArticle

106 Scopus citations

Metal Oxide Heterointerfaces in Hybrid Electronic Platforms

Mclachlan, M. A. & Ratcliff, E. L., May 25 2016, In : Advanced Materials. 28, 20, p. 3801 1 p.

Research output: Contribution to journalArticle

1 Scopus citations

Microstructure-dependent electrochemical properties of chemical-vapor deposited poly(3,4-ethylenedioxythiophene) (PEDOT) films

Arnold, S. P., Harris, J. K., Neelamraju, B., Rudolph, M. & Ratcliff, E. L., Jul 2019, In : Synthetic Metals. 253, p. 26-33 8 p.

Research output: Contribution to journalArticle

9 Scopus citations

Modification of the gallium-doped zinc oxide surface with self-assembled monolayers of phosphonic acids: A joint theoretical and experimental study

Li, H., Ratcliff, E. L., Sigdel, A. K., Giordano, A. J., Marder, S. R., Berry, J. J. & Brédas, J. L., Jun 18 2014, In : Advanced Functional Materials. 24, 23, p. 3593-3603 11 p.

Research output: Contribution to journalArticle

27 Scopus citations

Nanoscale Visualization and Multiscale Electrochemical Analysis of Conductive Polymer Electrodes

Daviddi, E., Chen, Z., Beam Massani, B., Lee, J., Bentley, C. L., Unwin, P. R. & Ratcliff, E. L., Jan 1 2019, In : ACS Nano.

Research output: Contribution to journalArticle

2 Scopus citations

Nickel oxide interlayer films from nickel formate-ethylenediamine precursor: Influence of annealing on thin film properties and photovoltaic device performance

Steirer, K. X., Richards, R. E., Sigdel, A. K., Garcia, A., Ndione, P. F., Hammond, S., Baker, D., Ratcliff, E. L., Curtis, C., Furtak, T., Ginley, D. S., Olson, D. C., Armstrong, N. R. & Berry, J. J., May 28 2015, In : Journal of Materials Chemistry A. 3, 20, p. 10949-10958 10 p.

Research output: Contribution to journalArticle

24 Scopus citations

Normal and inverted regimes of charge transfer controlled by density of states at polymer electrodes

Rudolph, M. & Ratcliff, E. L., Dec 1 2017, In : Nature communications. 8, 1, 1048.

Research output: Contribution to journalArticle

18 Scopus citations

Orientation of phenylphosphonic acid self-assembled monolayers on a transparent conductive oxide: A combined NEXAFS, PM-IRRAS, and DFT study

Gliboff, M., Sang, L., Knesting, K. M., Schalnat, M. C., Mudalige, A., Ratcliff, E. L., Li, H., Sigdel, A. K., Giordano, A. J., Berry, J. J., Nordlund, D., Seidler, G. T., Brédas, J. L., Marder, S. R., Pemberton, J. E. & Ginger, D. S., Feb 19 2013, In : Langmuir. 29, 7, p. 2166-2174 9 p.

Research output: Contribution to journalArticle

42 Scopus citations

Overcoming Redox Reactions at Perovskite-Nickel Oxide Interfaces to Boost Voltages in Perovskite Solar Cells

Boyd, C. C., Shallcross, R. C., Moot, T., Kerner, R., Bertoluzzi, L., Onno, A., Kavadiya, S., Chosy, C., Wolf, E. J., Werner, J., Raiford, J. A., de Paula, C., Palmstrom, A. F., Yu, Z. J., Berry, J. J., Bent, S. F., Holman, Z. C., Luther, J. M., Ratcliff, E. L., Armstrong, N. R. & 1 others, McGehee, M. D., Aug 19 2020, In : Joule. 4, 8, p. 1759-1775 17 p.

Research output: Contribution to journalArticle

Open Access

Oxide contacts in organic photovoltaics: Characterization and control of near-surface composition in indium-tin oxide (ITO) electrodes

Armstrong, N. R., Veneman, P. A., Ratcliff, E., Placencia, D. & Brumbach, M., Nov 17 2009, In : Accounts of Chemical Research. 42, 11, p. 1748-1757 10 p.

Research output: Contribution to journalArticle

149 Scopus citations

Phosphonic acid functionalized asymmetric phthalocyanines: Synthesis, modification of indium tin oxide, and charge transfer

Polaske, N. W., Lin, H. C., Tang, A., Mayukh, M., Oquendo, L. E., Green, J. T., Ratcliff, E. L., Armstrong, N. R., Saavedra, S. S. & McGrath, D. V., Dec 20 2011, In : Langmuir. 27, 24, p. 14900-14909 10 p.

Research output: Contribution to journalArticle

27 Scopus citations

Quantifying the extent of contact doping at the interface between high work function electrical contacts and poly(3-hexylthiophene) (P3HT)

Shallcross, R. C., Stubhan, T., Ratcliff, E. L., Kahn, A., Brabec, C. J. & Armstrong, N. R., Apr 16 2015, In : Journal of Physical Chemistry Letters. 6, 8, p. 1303-1309 7 p.

Research output: Contribution to journalArticle

27 Scopus citations

Rapid and reversible generation of a microscale pH gradient using surface electric fields

May, E. L. & Hillier, A. C., Oct 1 2005, In : Analytical chemistry. 77, 19, p. 6487-6493 7 p.

Research output: Contribution to journalArticle

22 Scopus citations

Scanning electrochemical mapping of spatially localized electrochemical reactions induced by surface potential gradients

Jayaraman, S., May, E. L. & Hillier, A. C., Dec 5 2006, In : Langmuir. 22, 25, p. 10322-10328 7 p.

Research output: Contribution to journalArticle

9 Scopus citations

Semi-random vs well-defined alternating donor-acceptor copolymers

Braunecker, W. A., Oosterhout, S. D., Owczarczyk, Z. R., Kopidakis, N., Ratcliff, E. L., Ginley, D. S. & Olson, D. C., Jul 15 2014, In : ACS Macro Letters. 3, 7, p. 622-627 6 p.

Research output: Contribution to journalArticle

22 Scopus citations

Sputtered nickel oxide thin film for efficient hole transport layer in polymer-fullerene bulk-heterojunction organic solar cell

Widjonarko, N. E., Ratcliff, E. L., Perkins, C. L., Sigdel, A. K., Zakutayev, A., Ndione, P. F., Gillaspie, D. T., Ginley, D. S., Olson, D. C. & Berry, J. J., Mar 1 2012, In : Thin Solid Films. 520, 10, p. 3813-3818 6 p.

Research output: Contribution to journalArticle

28 Scopus citations

Stability of Charge Transfer States in F4TCNQ-Doped P3HT

Watts, K. E., Neelamraju, B., Ratcliff, E. L. & Pemberton, J. E., Sep 10 2019, In : Chemistry of Materials. 31, 17, p. 6986-6994 9 p.

Research output: Contribution to journalArticle

4 Scopus citations

Stability of push-pull small molecule donors for organic photovoltaics: Spectroscopic degradation of acceptor endcaps on benzo[1,2-: B:4,5-b ]dithiophene cores

Watts, K. E., Nguyen, T., Tremolet De Villers, B. J., Neelamraju, B., Anderson, M. A., Braunecker, W. A., Ferguson, A. J., Larsen, R. E., Larson, B. W., Owczarczyk, Z. R., Pfeilsticker, J. R., Pemberton, J. E. & Ratcliff, E. L., Jan 1 2019, In : Journal of Materials Chemistry A. 7, 34, p. 19984-19995 12 p.

Research output: Contribution to journalArticle

Surface composition, work function, and electrochemical characteristics of gallium-doped zinc oxide

Ratcliff, E. L., Sigdel, A. K., MacEch, M. R., Nebesny, K., Lee, P. A., Ginley, D. S., Armstrong, N. R. & Berry, J. J., Jun 30 2012, In : Thin Solid Films. 520, 17, p. 5652-5663 12 p.

Research output: Contribution to journalArticle

19 Scopus citations

Systematic electrochemical oxidative doping of P3HT to probe interfacial charge transfer across polymer-fullerene interfaces

Jenkins, J. L., Lee, P. A., Nebesny, K. W. & Ratcliff, E. L., Dec 7 2014, In : Journal of Materials Chemistry A. 2, 45, p. 19221-19231 11 p.

Research output: Contribution to journalArticle

13 Scopus citations

Work function control of hole-selective polymer/ITO anode contacts: An electrochemical doping study

Ratcliff, E. L., Lee, P. A. & Armstrong, N. R., Mar 23 2010, In : Journal of Materials Chemistry. 20, 13, p. 2672-2679 8 p.

Research output: Contribution to journalArticle

46 Scopus citations