Moore G, Causa' M, Hardigree JFM, Karuthedath S, Ramirez I, Jungbluth A, Laquai F, Riede M, Banerji N. Ultrafast Charge Dynamics in Dilute-Donor versus Highly Intermixed TAPC:C60 Organic Solar Cell Blends. Journal of Physical Chemistry Letters 2020 11:5610-5617.
Derrien TL, Lauritzen AE, Kaienburg P, Hardigree JFM, Nicklin C, Riede M. In-Situ Observations of the Growth Mode of Vacuum Deposited α-Sexithiophene. Journal of Physical Chemistry C 2020: 124:11863-11869.
Ye H, Kesava SV, Hardigree JFM, Brown RE, Mazzotta G, Warren R, Skabara PJ, Riede M. Efficiency enhancement of small molecule organic solar cells using hexapropyltruxene as an interface layer. Journal of Materials Chemistry C 2020; 8:4909-4918.
Warren PR, Hardigree JFM, Lauritzen AE, Nelson J, Riede M. Tuning the ambipolar behavior of organic field effect transistors via band engineering. AIP Advances 2019; 9:035202.
Causa' M, Ramirez R, Hardigree JFM, Riede M, Banerji N. Femtosecond Dynamics of Photoexcited C60 Films. Journal of Physical Chemistry Letters 2018; 9:1885-1892.
Hardigree JFM , Ramirez IR, Mazzotta G, Nicklin C, Riede M. In-situ observation of stacking fault evolution in vacuum-deposited C60. Applied Physics Letters 2017; 111:233305.
Nicklin C, Hardigree JFM, Warne A, Green S, Burt M, Naylor J, Dorman A, Wicks D, Din S, Riede M. MINERVA: A facility to study Microstructure and Interface Evolution in Realtime under Vacuum. Review of Scientific Instruments 2017; 88:103901.
Milot RL, Sutton RJ, Eperon GE, Haghighirad AA, Hardigree JFM, Miranda L, Snaith HJ, Johnston MB, Herz LM. Charge-Carrier Dynamics in 2D Hybrid Metal — Halide Perovskites. Nano Letters 2016; 16:7001-7007.
Wojciechowski K, Ramirez IR, Gorisse T, Dautel O, Dasari R, Sakai N, Hardigree JFM, Song S, Marder S, Riede M, Wantz G, Snaith HJ. Cross-Linkable Fullerene Derivatives for Solution-Processed n — i — p Perovskite Solar Cells. ACS Energy Letters 2016; 1:648-653.
Alley O, Wu MY, Hardigree JFM, Arnold MS, Katz HE. Substrate-correlated interface polarity reversal at a carbon nanotube/fullerene junction. Proc. 42nd IEEE Photovoltaics Specialist Conference 2015; 1-5.
Alley O, Wu MY, Johns GL, Dawidczyk TJ, Hardigree JFM, Marković N, Arnold M, Katz HE. Negative polarity of phenyl-C61 butyric acid methyl ester adjacent to donor macromolecule domains. Applied Physics Letters 2015; 106:033301.
Yeh ML, Wang SY, Hardigree JFM, Podzorov V, Katz HE. Effect of side chain length on film structure and electron mobility of core-unsubstituted pyromellitic diimides and enhanced mobility of the dibrominated core using the optimized side chain. Journal of Materials Chemistry C 2015; 3:3029-3037.
Surampudi S, Yeh ML, Siegler M, Hardigree JFM, Kasl T, Katz HE, Klausen RS. Increased carrier mobility in end-functionalized oligosilanes. Chemical Science 2015; 6:1905-1909.
Streifel BC, Hardigree JFM, Katz HE, Tovar JD. Heteroaromatic variation in amorphous 1,6-methano[10]annulene-based charge-transporting organic semiconductors. Journal of Materials Chemistry C, 2014; 2:7851-7858.
Hardigree JFM and Katz HE. Through Thick and Thin: Tuning the Threshold Voltage in Organic Field-Effect Transistors. Accounts of Chemical Research 2014; 47:1369-1377.
Dawidczyk TJ, Hardigree JFM, Johns GL, Ozgun R, Alley O, Andreou AG, Marković N, Katz HE, "Visualizing and Quantifying Charge Distributions Correlated to Threshold Voltage Shifts in Lateral Organic Transistors," ACS Nano 2014; 8:2714-2724.
Huang W, Besar K, LeCover R, Dulloor P, Sinha J, Hardigree JFM, Pick C, Swavola J, Everett AD, Frechette J, Bevan M, Katz HE. Label-free brain injury biomarker detection based on highly sensitive large area organic thin film transistor with hybrid coupling layer. Chemical Science 2014; 5:416-426.
Hardigree JFM, Dawidczyk TJ, Ireland RM, Johns GL, Jung BJ, Nyman M, Österbacka R, Marković N, Katz HE. Reducing Leakage Currents in n-Channel Organic Field-Effect Transistors using Molecular Dipole Monolayers on Nanoscale Oxides. ACS Applied Materials and Interfaces 2013; 5:7025-7032.
Huang W, Sinha J, Yeh ML, Hardigree JFM, LeCover R, Besar K, Rule AM, Breysse PN, Katz HE. Diverse Organic Field-Effect Transistor Sensor Responses from Two Functionalized Naphthalenetetracarboxylic Diimides and Copper Phthalocyanine Semiconductors Distinguishable Over a Wide Analyte Range. Advanced Functional Materials 2013; 23:4094-4104.
Nyman M, Sandberg O, Hardigree JFM, Kola S, Katz HE, Österbacka R. Voltage dependent displacement current as a tool to measure the vacuum level shift caused by self-assembled monolayers on aluminum oxide. Applied Physics Letters 2013; 103:243502.
Streifel BC, Peart PA, Hardigree JFM, Katz HE, Tovar JD. Torsional Influences within Disordered Organic Electronic Materials Based upon Non-Benzenoid 1,6-Methano[10]annulene Rings. Macromolecules 2012; 45:7339-7349.
Jung BJ, Hardigree JFM, Dawidczyk TJ, Sun J, Dhar BM, See KC, Katz HE. Naphthalenetetracarboxylic Diimide Layer-Based Transistors with Nanometer Oxide and Side Chain Dielectrics Operating below One Volt. ACS Nano 2011; 5:2723-2734.
Presentations
Hardigree JFM, Ramirez IR, Mazzotta G, Nicklin C, Riede M. In-situ x-ray characterization of molecular semiconductors for organic photovoltaics. Talk, Annual Showcase, Centre for Doctoral Training in New and Sustainable Photovoltaics, Liverpool GB, 2017.
Hardigree JFM, Mazzotta G, Ramirez IR, Naylor J, Nicklin C, Riede M. Grazing incidence x-ray diffraction of molecular thin films for organic electronics. Talk, XMaS@20 Conference, ESRF — The European Synchrotron, Grenoble FR, 2017.
Hardigree JFM, Ramirez IR, Mazzotta G, Nicklin C, Riede M. In-situ characterization of vacuum deposited materials. Talk, Telluride Science Research Conference - Workshop on Regulating the Interfacial Physicochemical Processes of Organic Semiconductors by Design, Telluride CO, 2017.
Hardigree JFM, Riede M, Ramirez IR, Mazzotta G, Morel A, Gutfreund P, Wermeille D. Assessing microstructure and interfacial diffusion of MoO3 in organic solar cells using x-ray and neutron scattering. Talk, Intl. Conference on Advanced Ceramics and Composites — Advanced Ceramic Materials and Processing for Photonics and Energy, Daytona FL, 2017.
Hardigree JFM, Kesava SV, Riede M. In-situ X-ray and Optical Characterisation of Vacuum-Deposited Organic Semiconductors. Talk, JSPS London Research Promotion Conference, London GB, 2016.
Hardigree JFM, Warne A, Mazzotta G, Ramirez IR, Green S, Burt M, Dorman A, Din S, Wicks D, Naylor J, Riede M, Nicklin C. In-situ GIWAXS of Vacuum-deposited Organic Photovoltaic Thin Films at Diamond Light Source. Poster, BeSSyII Energy Materials Research Workshop, Helmholtz-Zentrum Berlin DE, 2016.
Hardigree JFM, Morse GE, Tiwana P, Mazzotta G, Ramirez IR, Nicklin C, Lozman OR, Riede M. Managing BHJ microstructural evolution for long-term photoconversion efficiency. Talk, SPIE Optics+Photonics, San Diego CA, 2016.
Hardigree JFM. X-ray and Neutron Scattering for Revealing Microstructure and Interfaces in OPVs. Talk, Polymer-Carbon Nanotubes Active Systems for Photovoltaics Winter School, Imperial College, London GB, 2016.
Hardigree JFM, Dawidczyk TJ, Nyman M, Österbacka R, Katz HE. Charge Extraction Analysis of Inorganic and Organic Dielectrics for Organic Field-Effect Transistors. Talk, American Physical Society Meeting, Denver CO, 2014.
Hardigree JFM, Dawidczyk TJ, Ireland RM, Johns GL, Jung BJ, Marković N, and Katz HE. Controlling Leakage Currents in Organic Field Effect Transistors using Molecular Dipole Monolayers on Nanoscale Oxides. Talk, American Physical Society Meeting, Baltimore MD, 2013.
Hardigree JFM, Dawidczyk TJ, Ireland RM, Johns GL, Jung BJ, Marković N, and Katz HE. Gate Leakage Current Reduction from a Silane Monolayer Dipole in a Naphthalenetetracarboxylic Diimide Transistor Enabling Use of a Minimal 10-nm Silicon Oxide Dielectric. Poster, Materials Research Society Fall Meeting, Boston MA, 2012.