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Research Interests

• Organic-based electronic devices including transistors and diodes
• Hybrid nanoparticles for biological imaging and mechanistic toxicology studies
• Chemically sensitive devices and systems
• Organic and hybrid materials for photonics
• Synthesis of conjugated organic compounds as semimconductors and chromophores
• Spin-transporting, spin-doped, and spin-coupled organic semiconductors and magnetoelectronic effects
• Molecular interactions and complexation
• Dielectric and high-field properties of materials
• Nonlinear optical materials
• Nanostructures and junctions in electronic and optical devices
• Thermoelectric and photovoltaic energy conversion in organic and polymeric materials
• Organic materials in science and technology education

Group Members

• Angela Alexander
• Thomas Dawidczyk
• Kedar Deshmukh
• Bal Mukund Dhar
• Jia Huang
• Byung Jun Jung
• Taegweon Lee
• Dann Martin
• Bhola Nath Pal
• Jia Sun
• Ming-Ling Yeh
• Qingdong Zheng

Projects

• Hybrid devices
• New electron-carrying organic semiconductors
• Organic semiconductor devices in engineering education
• Organic semiconductor-based sensors of national security interest
• Silica nanoparticles for imaging and toxicology studies
• Spintronic effects in organic semiconductors
• Thermoelectric polymer blends
• Tuning semiconductor device properties with static charge

Publications

Correlation between Microstructure and Magnetotransport in Organic Semiconductor Spin Valve Structures
Liu, Y.; Watson, S.M.; Lee, T.; Gorham, J.M.; Katz, H.E.; Borchers, J.A.; Fairbrother, H.D.; Reich, DH.. Phys. Rev. B 79, 075312 (2009).
DOI: 10.1103/PhysRevB.79.075312

Improved Morphology and Performance from Surface Treatments of Naphthalenetetracarboxylic Diimide Bottom Contact Field-Effect Transistors
Sun, J; Devine, R.; Dhar, B.M.; Jung, B.J.; See, K.C.; Katz, H.E.. ACS Appl. Mater. Interfaces 1 (8), 1763-1769 (2009).
DOI: 10.1021/am900296h

Low-Temperature-Processible, Transparent, and Air-Operable n-Channel Fluorinated Phenylethylated Naphthalenetetracarboxylic Diimide Semiconductors Applied to Flexible Transistors
Byung Jun Jung, Jia Sun, Taegweon Lee, Amy Sarjeant, and Howard E. Katz. Chem. Mater. ASAP, (2009).
DOI: 10.1021/cm802281k

Solution-deposited sodium beta-alumina gate dielectrics for low-voltage and transparent field-effect transistors
Bhola N. Pal, Bal Mukund Dhar, Kevin C. See & Howard E. Katz. Nature Materials 8, 898-903 (2009).
DOI: doi:10.1038/nmat2560

Synthesis, Structural Characterization, and Unusual Field-Effect Behavior of Organic Transistor Semiconductor Oligomers: Inferiority of Oxadiazole Compared with Other Electron-Withdrawing Subunits
Lee. T.; Landis, C.L.; Dhar, B.M.; Jung, B.J.; Sun, J., Sarjeant, A.; Lee, J.-J.; Katz. H.E.. J. Am. Chem. Soc. 131 (5), 1692–1705 (2009).
DOI: 10.1021/ja807219x

Tunability of Mobility and Conductivity over Large Ranges in Poly(3,3’’’-didodecylquaterthiophene)/Insulating Polymer Composites
Sun, J.; Jun, B.J.; Lee, T.; Berger, L.; Huang, J.; Katz, H.E., Liu, Y.; Reich, D.H.. ACS Appl. Mater. Interfaces 1, (2) (2009).
DOI: 10.1021/am8001132

Tuning of threshold voltage in organic field-effect transistors with hydrophobic gate dielectric using monoenergetic low-energy electron beams and triode corona
Deshmukh, KD; Reuter, K; Kempa, H; West, JE; Katz, HE. Appl. Phys. Lett. 95, 113307 (2009).
DOI: 10.1063/1.3222854

Easily Synthesized, Highly Crystalline Naphthalenetetracarboxylic Diimide Semiconductors with High Electron Mobility in Air
See, K.; Sarjeant, A.; Landis, C.L.; Katz, H.E.. Chem. Mater. 20, 11, 3609-3616 (2008).
DOI: 10.1021/cm7032614

Monolayer-dimensional 5,5’-bis(4-hexylphenyl)-2,2’-bithiophene transistors and chemically responsive heterostructures
Huang, J.; Sun, J.; Katz, H.E. Adv. Mater. 20, 13, 2567-2572 (2008).
DOI: 10.1002/adma.200703212

Pentacene-Zinc Oxide Vertical Diode with 15-MHz Rectification
Pal, B.N.; Sun, J.; Jung, B.J., Katz, H.E.; Choi, E.; Andreou, A.. Adv. Mater. 20, 5, 1023-1028 (2008).
DOI: 10.1002/adma.200701550

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Awards

• APS Fellowship, Divison of Materials Physics, March 10, 2008.
• Materials Research Society Fellow, March 26, 2008.
• Materials Research Society Board of Directors 2001; President 2004, IUMRS President 2009
• AAAS Fellowship, February, 2004.
• R&D100 Awards, plastic displays and holographic materials, 2002.
• Finalist, JHU Teaching Award, February 01, 2006 - June 01, 2006.
• Distinguished Member of Technical Staff Award, Bell Laboratories, 1998.