Publications in VIVO

Co-author Network

Shaheen, Sean Eric Associate Professor

Positions

Associate Professor, Electrical, Computer and Energy Engineering (ECEE)
Associate Professor, Physics
Faculty Director, College of Engineering and Applied Science

Research Areas

Research

research overview

The Shaheen group carries out research in a variety of areas aimed at advancing solar energy harvesting, developing new optoelectronic materials and devices, and studying fundamental processes in biological systems. The central mission of our work is to find creative and insightful solutions to scientific problems both basic and applied, using a combination of experimental research and computational simulation to guide our efforts.

keywords

photovoltaic materials and devices, organic electronics, organic electrochemical transistors, memory devices, neuromorphic circuitry, biophysics, biological complexity, microbial consortia

Publications

selected publications

chapter
- Photovoltaics for the Next Generation: Organic-Based Solar Cells. 2879-2879. 2013
- Polymer and Nanoparticle-Composite Bistable Devices: Physics of Operation and Initial Applications. 291-314. 2012
conference proceeding
- Singlet-based photon upconversion in multichromophore organic thin films. Proceedings of SPIE. 2015
- A better understanding of organic electrochemical transistors for biosensing applications. Proceedings of SPIE. 2015
- Holographic spectral beamsplitting for increased organic photovoltaic conversion efficiency. Proceedings of SPIE. 2014
- Optical method for making spatially and temporally resolved measurements of the hole concentration in organic electrochemical transistors. Proceedings of SPIE. 2014
- High Open Circuit Voltage Organic Photovoltaics: Minimizing Energetic Loss with a High Band Gap Donor Polymer and a Small-Molecule Acceptor 2014
- Thermal annealing affects vertical morphology, doping and defect density in BHJ OPV devices. 2575-2580. 2014
journal article
- Molecular weight dependence of carrier mobility and recombination rate in neat P3HT films. Journal of Polymer Science Part B: Polymer Physics. 31-35. 2018
- High-Performance Flexible Perovskite Solar Cells on Ultrathin Glass: Implications of the TCO. Journal of Physical Chemistry Letters. 4960-4966. 2017
- Influence of disorder on transfer characteristics of organic electrochemical transistors. Applied Physics Letters. 2017
- Role of Crystallization in the Morphology of Polymer:Non-fullerene Acceptor Bulk Heterojunctions. ACS Applied Materials and Interfaces. 19021-19029. 2017
- Experimental demonstration of photon upconversion via cooperative energy pooling. Nature Communications. 2017
- Thermal engineering of FAPbI(3) perovskite material via radiative thermal annealing and in situ XRD. Nature Communications. 2017
- Microsecond Response in Organic Electrochemical Transistors: Exceeding the Ionic Speed Limit. Advanced Materials. 8398-8404. 2016
- A Mini Review of Neuromorphic Architectures and Implementations. IEEE Transactions on Electron Devices. 3819-3829. 2016
- Switchable diffractive optics using patterned PEDOT: PSS based electrochromic thin-films. Organic Electronics. 271-279. 2016
- Removal of Residual Diiodooctane Improves Photostability of High-Performance Organic Solar Cell Polymers. Chemistry of Materials. 876-884. 2016
- Optical Measurements Revealing Nonuniform Hole Mobility in Organic Electrochemical Transistors. Advanced Electronic Materials. 2015
- Energy Pooling Upconversion in Organic Molecular Systems. Journal of Physical Chemistry A. 4009-4016. 2015
- Effect of fractal silver electrodes on charge collection and light distribution in semiconducting organic polymer films. Journal of Materials Chemistry A. 16608-16616. 2014
- Neurons in Polymer: Hardware Neural Units Based on Polymer Memristive Devices and Polymer Transistors. IEEE Transactions on Electron Devices. 3513-3519. 2014
- An inverted, organic WORM device based on PEDOT:PSS with very low turn-on voltage. Organic Electronics. 1791-1798. 2014
- Inherent properties of adenylosuccinate lyase could explain S-Ado/SAICAr ratio due to homozygous R426H and R303C mutations.. BBA - Biochimica et Biophysica Acta. 1545-1553. 2013
- Highly efficient charge transfer in nanocrystalline Si:H solar cells. Applied Physics Letters. 133101-133101. 2013
- Pathways to a New Efficiency Regime for Organic Solar Cells. Advanced Energy Materials. 1246-1253. 2012
- Radio-frequency superimposed direct current magnetron sputtered Ga:ZnO transparent conducting thin films. Journal of Applied Physics. 093718-093718. 2012
- Monitoring performance degradation of cerebellar functions using computational neuroscience methods: implications on neurological diseases.. PLoS ONE. e45581. 2012
- Dark Carriers, Trapping, and Activation Control of Carrier Recombination in Neat P3HT and P3HT:PCBM Blends. Journal of Physical Chemistry C. 23134-23148. 2011
- Simultaneous measurement of carrier density and mobility of organic semiconductors using capacitance techniques. Organic Electronics. 1879-1885. 2011
- Time-of-Flight Studies of Electron-Collection Kinetics in Polymer:Fullerene Bulk-Heterojunction Solar Cells. Advanced Materials for Optics and Electronics. 2580-2586. 2011
- Photovoltaic manufacturing: Present status, future prospects, and research needs. Journal of Vacuum Science and Technology A. 030801-030801. 2011
- Air-processed organic photovoltaic devices fabricated with hot press lamination. Organic Electronics. 108-112. 2011
- Conjugated Thiophene Dendrimer with an Electron-Withdrawing Core and Electron-Rich Dendrons: How the Molecular Structure Affects the Morphology and Performance of Dendrimer:Fullerene Photovoltaic Devices. Journal of Physical Chemistry C. 22269-22276. 2010
- Photoinduced Degradation of Polymer and Polymer-Fullerene Active Layers: Experiment and Theory. Advanced Materials for Optics and Electronics. 3476-3483. 2010
- A simple miniature controlled-atmosphere chamber for optoelectronic characterizations. Solar Energy Materials and Solar Cells. 1254-1258. 2010
- Exciton migration in conjugated dendrimers: a joint experimental and theoretical study.. ChemPhysChem. 3285-3294. 2009
- A round robin study of flexible large-area roll-to-roll processed polymer solar cell modules. Solar Energy Materials and Solar Cells. 1968-1977. 2009
- Detection of protein secondary structures via the discrete wavelet transform.. Physical Review E. 051909. 2009
- The Effect of Ionization Potential and Film Morphology on Exciplex Formation and Charge Generation in Blends of Polyfluorene Polymers and Silole Derivatives. Journal of Physical Chemistry C. 14533-14539. 2009
- Structure-Dependent Photophysics of First-Generation Phenyl-Cored Thiophene Dendrimers. Chemistry of Materials. 287-297. 2009
- Effect of ZnO Processing on the Photovoltage of ZnO/Poly(3-hexylthiophene) Solar Cells. Journal of Physical Chemistry C. 9544-9547. 2008
- Pathways for the degradation of organic photovoltaic P3HT:PCBM based devices. Solar Energy Materials and Solar Cells. 746-752. 2008
- Quenching of Excitons by Holes in Poly(3-hexylthiophene) Films. Journal of Physical Chemistry C. 9865-9871. 2008
- Bipolar Charge Transport in PCPDTBT-PCBM Bulk-Heterojunctions for Photovoltaic Applications. Advanced Materials for Optics and Electronics. 1757-1766. 2008
- Optimal negative electrodes for poly(3-hexylthiophene): [6,6]-phenyl C61-butyric acid methyl ester bulk heterojunction photovoltaic devices. Applied Physics Letters. 053307-053307. 2008
- Performance of bulk heterojunction photovoltaic devices prepared by airbrush spray deposition. Applied Physics Letters. 2008
- Hydrostatic pressure effects on poly(3-hexylthiophene) thin film transistors. Applied Physics Letters. 013305-013305. 2008
- The Locus of Free Charge-Carrier Generation in Solution-Cast Zn1–xMgxO/Poly(3-hexylthiophene) Bilayers for Photovoltaic Applications. Advanced Materials for Optics and Electronics. 3849-3857. 2007
- Effect of Polymer Processing on the Performance of Poly(3-hexylthiophene)/ZnO Nanorod Photovoltaic Devices. Journal of Physical Chemistry C. 16640-16645. 2007
- The Effect of Atmosphere and ZnO Morphology on the Performance of Hybrid Poly(3-hexylthiophene)/ZnO Nanofiber Photovoltaic Devices. Journal of Physical Chemistry C. 16670-16678. 2007
- Theoretical studies on conjugated phenyl-cored thiophene dendrimers for photovoltaic applications.. Journal of the American Chemical Society. 14257-14270. 2007
- Bulk heterojunctions based on a low band gap copolymer of thiophene and benzothiadiazole. Solar Energy Materials and Solar Cells. 1631-1637. 2007
- Band-offset engineering for enhanced open-circuit voltage in polymer-oxide hybrid solar cells. Advanced Materials for Optics and Electronics. 264-269. 2007
- Photoinduced charge carrier generation in a poly(3-hexylthiophene) and methanofullerene bulk heterojunction investigated by time-resolved terahertz spectroscopy. Journal of Physical Chemistry B. 25462-25471. 2006
- Inverted bulk-heterojunction organic photovoltaic device using a solution-derived ZnO underlayer. Applied Physics Letters. 2006
- Bulk heterojunction organic photovoltaic devices based on phenyl-cored thiophene dendrimers. Applied Physics Letters. 103524-103524. 2006
- Organic solar cells with carbon nanotubes replacing In2O3:Sn as the transparent electrode. Applied Physics Letters. 233503-233503. 2006
- Dependence of band offset and open-circuit voltage on the interfacial interaction between TiO2 and carboxylated polythiophenes.. Journal of Physical Chemistry B. 3257-3261. 2006
- Hybrid photovoltaic devices of polymer and ZnO nanofiber composites. Thin Solid Films. 26-29. 2006
- Conducting polymer and hydrogenated amorphous silicon hybrid solar cells. Applied Physics Letters. 223504-223504. 2005
- Organic-based photovoltaics. toward low-cost power generation. MRS Bulletin. 10-19. 2005
- Defect structural characterization of organic polymer layers. Journal of Non-Crystalline Solids. 612-616. 2004
- Nanostructured p–n Junctions for Printable Photovoltaics. MRS Bulletin. 43-47. 2004
- Hybrid organic-inorganic photoconductive diode. Applied Physics Letters. 3404-3406. 2003
- Dependence of field-effect hole mobility of PPV-based polymer films on the spin-casting solvent. Organic Electronics. 105-110. 2002
- Influence of the anodic work function on the performance of organic solar cells.. ChemPhysChem. 795-799. 2002
- Effect of LiF/metal electrodes on the performance of plastic solar cells. Applied Physics Letters. 1288-1290. 2002
- Synthesis and Characterization of a Poly(1,3-dithienylisothianaphthene) Derivative for Bulk Heterojunction Photovoltaic Cells. Journal of Physical Chemistry B. 11106-11113. 2001
- Fabrication of bulk heterojunction plastic solar cells by screen printing. Applied Physics Letters. 2996-2998. 2001
- Low band-gap polymeric photovoltaic devices. Synthetic Metals. 1583-1584. 2001
- Organic photovoltaic devices produced from conjugated polymer / methanofullerene bulk heterojunctions. Synthetic Metals. 1517-1520. 2001
- 2.5% efficient organic plastic solar cells. Applied Physics Letters. 841-843. 2001
- High T/sub g/ hole transport polymers for the fabrication of bright and efficient organic light-emitting devices with an air-stable cathode. IEEE Journal of Quantum Electronics. 12-17. 2000
- Covalently Interlinked Organic LED Transport Layers via Spin-Coating/Siloxane Condensation. Advanced Materials. 730-734. 1999
- Energy and charge transfer in organic light-emitting diodes: A soluble quinacridone study. Journal of Applied Physics. 7939-7945. 1999
- Organic light-emitting diode with 20 lm/W efficiency using a triphenyldiamine side-group polymer as the hole transport layer. Applied Physics Letters. 3212-3214. 1999
- Self-Assembly Processes for Organic LED Electrode Passivation and Charge Injection Balance. Advanced Materials. 227-231. 1999
- Organic Two-Layer Light-Emitting Diodes Based on High- T g Hole-Transporting Polymers with Different Redox Potentials. Chemistry of Materials. 399-407. 1999
- A numerical study of operational characteristics of organic light-emitting diodes. Journal of Applied Physics. 5306-5314. 1998
- Synthesis and Characterization of Poly(2,5-bis( N -methyl- N -hexylamino)phenylene vinylene), a Conjugated Polymer for Light-Emitting Diodes. Macromolecules. 7566-7569. 1998
- Electrochemistry and Electrogenerated Chemiluminescence Processes of the Components of Aluminum Quinolate/Triarylamine, and Related Organic Light-Emitting Diodes. Journal of the American Chemical Society. 9646-9655. 1998
- Bright blue organic light-emitting diode with improved color purity using a LiF/Al cathode. Journal of Applied Physics. 2324-2327. 1998
- New Triarylamine-Containing Polymers as Hole Transport Materials in Organic Light-Emitting Diodes: Effect of Polymer Structure and Cross-Linking on Device Characteristics. Chemistry of Materials. 1668-1676. 1998
- Exciplex Electroluminescence from Organic Bilayer Devices Composed of Triphenyldiamine and Quinoxaline Derivatives. Advanced Materials. 230-233. 1998
- Highly efficient and bright organic electroluminescent devices with an aluminum cathode. Applied Physics Letters. 1762-1764. 1997
- A model for the current–voltage characteristics and the quantum efficiency of single-layer organic light emitting diodes. Applied Physics Letters. 1290-1292. 1997
- Substituted Aluminum and Zinc Quinolates with Blue-Shifted Absorbance/Luminescence Bands: Synthesis and Spectroscopic, Photoluminescence, and Electroluminescence Characterization. Chemistry of Materials. 344-351. 1996

Background

education and training

Ph.D., University of Arizona 1999
B.S., Carnegie Mellon University 1991

awards and honors

Provost's Faculty Achievement Award for Tenured Faculty (Academic Affairs), conferred by Academic Affairs, 2017
Fellow (Renewable & Sustainable Energy Institute (RASEI)), conferred by Renewable & Sustainable Energy Institute (RASEI), 2013

International Activities

global connections related to teaching and scholarly work (in recent years)

France Country
India Country
Saudi Arabia Country
United Kingdom Country

Other Profiles

ORCID iD

http://orcid.org/0000-0002-7179-9230