Hamna Iqbal
Ph.D. in Physics with research background in semiconductor materials and electronic devices.
Research Expertise
About
Publications
Charge carrier traps in organic semiconductors: a review on the underlying physics and impact on electronic devices
Journal of Materials Chemistry C / Jan 01, 2020
Haneef, H. F., Zeidell, A. M., & Jurchescu, O. D. (2020). Charge carrier traps in organic semiconductors: a review on the underlying physics and impact on electronic devices. Journal of Materials Chemistry C, 8(3), 759–787. https://doi.org/10.1039/c9tc05695e
Correlated metals as transparent conductors
Nature Materials / Dec 14, 2015
Zhang, L., Zhou, Y., Guo, L., Zhao, W., Barnes, A., Zhang, H.-T., Eaton, C., Zheng, Y., Brahlek, M., Haneef, H. F., Podraza, N. J., Chan, M. H. W., Gopalan, V., Rabe, K. M., & Engel-Herbert, R. (2015). Correlated metals as transparent conductors. Nature Materials, 15(2), 204–210. https://doi.org/10.1038/nmat4493
Tutorial: Organic field-effect transistors: Materials, structure and operation
Journal of Applied Physics / Aug 17, 2018
Lamport, Z. A., Haneef, H. F., Anand, S., Waldrip, M., & Jurchescu, O. D. (2018). Tutorial: Organic field-effect transistors: Materials, structure and operation. Journal of Applied Physics, 124(7). https://doi.org/10.1063/1.5042255
Suppressing bias stress degradation in high performance solution processed organic transistors operating in air
Nature Communications / Apr 21, 2021
Iqbal, H. F., Ai, Q., Thorley, K. J., Chen, H., McCulloch, I., Risko, C., Anthony, J. E., & Jurchescu, O. D. (2021). Suppressing bias stress degradation in high performance solution processed organic transistors operating in air. Nature Communications, 12(1). https://doi.org/10.1038/s41467-021-22683-2
Charge‐Transport Properties of F6TNAP‐Based Charge‐Transfer Cocrystals
Advanced Functional Materials / Oct 09, 2019
Dasari, R. R., Wang, X., Wiscons, R. A., Haneef, H. F., Ashokan, A., Zhang, Y., Fonari, M. S., Barlow, S., Coropceanu, V., Timofeeva, T. V., Jurchescu, O. D., Brédas, J., Matzger, A. J., & Marder, S. R. (2019). Charge‐Transport Properties of F6TNAP‐Based Charge‐Transfer Cocrystals. Advanced Functional Materials, 29(49). Portico. https://doi.org/10.1002/adfm.201904858
Optical function spectra and bandgap energy of Cu2SnSe3
Applied Physics Letters / Jan 26, 2015
Choi, S. G., Kang, J., Li, J., Haneef, H., Podraza, N. J., Beall, C., Wei, S.-H., Christensen, S. T., & Repins, I. L. (2015). Optical function spectra and bandgap energy of Cu2SnSe3. Applied Physics Letters, 106(4). https://doi.org/10.1063/1.4907202
Optical properties of single-crystal Gd3 Ga5 O12 from the infrared to ultraviolet
physica status solidi (b) / Jun 17, 2015
Ghimire, K., Haneef, H. F., Collins, R. W., & Podraza, N. J. (2015). Optical properties of single-crystal Gd3 Ga5 O12 from the infrared to ultraviolet: Optical properties of single-crystal Gd3 Ga5 O12 from IR to UV. Physica Status Solidi (b), 252(10), 2191–2198. Portico. https://doi.org/10.1002/pssb.201552115
Approach for extracting complex dielectric function spectra in weakly-absorbing regions
Thin Solid Films / Nov 01, 2014
Karki Gautam, L., Haneef, H., Junda, M. M., Saint John, D. B., & Podraza, N. J. (2014). Approach for extracting complex dielectric function spectra in weakly-absorbing regions. Thin Solid Films, 571, 548–553. https://doi.org/10.1016/j.tsf.2014.03.020
Large‐Area Uniform Polymer Transistor Arrays on Flexible Substrates: Towards High‐Throughput Sensor Fabrication
Advanced Materials Technologies / Jun 15, 2020
Zeidell, A. M., Filston, D. S., Waldrip, M., Iqbal, H. F., Chen, H., McCulloch, I., & Jurchescu, O. D. (2020). Large‐Area Uniform Polymer Transistor Arrays on Flexible Substrates: Towards High‐Throughput Sensor Fabrication. Advanced Materials Technologies, 5(8). Portico. https://doi.org/10.1002/admt.202000390
Computationally aided design of a high-performance organic semiconductor: the development of a universal crystal engineering core
Chemical Science / Jan 01, 2019
Petty, A. J., Ai, Q., Sorli, J. C., Haneef, H. F., Purdum, G. E., Boehm, A., Granger, D. B., Gu, K., Rubinger, C. P. L., Parkin, S. R., Graham, K. R., Jurchescu, O. D., Loo, Y.-L., Risko, C., & Anthony, J. E. (2019). Computationally aided design of a high-performance organic semiconductor: the development of a universal crystal engineering core. Chemical Science, 10(45), 10543–10549. https://doi.org/10.1039/c9sc02930c
Organic Field‐Effect Transistors as Flexible, Tissue‐Equivalent Radiation Dosimeters in Medical Applications
Advanced Science / Jul 30, 2020
Zeidell, A. M., Ren, T., Filston, D. S., Iqbal, H. F., Holland, E., Bourland, J. D., Anthony, J. E., & Jurchescu, O. D. (2020). Organic Field‐Effect Transistors as Flexible, Tissue‐Equivalent Radiation Dosimeters in Medical Applications. Advanced Science, 7(18). Portico. https://doi.org/10.1002/advs.202001522
Electronic properties and structure of single crystal perylene
Organic Electronics / Oct 01, 2018
Pookpanratana, S. J., Goetz, K. P., Bittle, E. G., Haneef, H., You, L., Hacker, C. A., Robey, S. W., Jurchescu, O. D., Ovsyannikov, R., & Giangrisostomi, E. (2018). Electronic properties and structure of single crystal perylene. Organic Electronics, 61, 157–163. https://doi.org/10.1016/j.orgel.2018.05.035
Influence of solvent additives on the morphology and electrical properties of diF-TES ADT organic field-effect transistors
Organic Electronics / May 01, 2019
Rubinger, C. P. L., Haneef, H. F., Hewitt, C., Carroll, D., Anthony, J. E., & Jurchescu, O. D. (2019). Influence of solvent additives on the morphology and electrical properties of diF-TES ADT organic field-effect transistors. Organic Electronics, 68, 205–211. https://doi.org/10.1016/j.orgel.2019.02.021
Optical properties of single crystal Bi4Ge3O12 from the infrared to ultraviolet
Journal of Applied Physics / Oct 24, 2014
Haneef, H. F., & Podraza, N. J. (2014). Optical properties of single crystal Bi4Ge3O12 from the infrared to ultraviolet. Journal of Applied Physics, 116(16). https://doi.org/10.1063/1.4898762
Spectroscopic Ellipsometry Studies of n-i-p Hydrogenated Amorphous Silicon Based Photovoltaic Devices
Materials / Feb 25, 2016
Karki Gautam, L., Junda, M., Haneef, H., Collins, R., & Podraza, N. (2016). Spectroscopic Ellipsometry Studies of n-i-p Hydrogenated Amorphous Silicon Based Photovoltaic Devices. Materials, 9(3), 128. https://doi.org/10.3390/ma9030128
Elucidating the Role of Water‐Related Traps in the Operation of Polymer Field‐Effect Transistors
Advanced Electronic Materials / Jun 24, 2021
Iqbal, H. F., Waldrip, M., Chen, H., McCulloch, I., & Jurchescu, O. D. (2021). Elucidating the Role of Water‐Related Traps in the Operation of Polymer Field‐Effect Transistors. Advanced Electronic Materials, 7(9). Portico. https://doi.org/10.1002/aelm.202100393
Organic single crystals of charge-transfer complexes: model systems for the study of donor/acceptor interactions
Materials Horizons / Jan 01, 2022
Goetz, K. P., Iqbal, H. F., Bittle, E. G., Hacker, C. A., Pookpanratana, S., & Jurchescu, O. D. (2022). Organic single crystals of charge-transfer complexes: model systems for the study of donor/acceptor interactions. Materials Horizons, 9(1), 271–280. https://doi.org/10.1039/d1mh01214b
Real-time monitoring of trap dynamics reveals the electronic states that limit charge transport in crystalline organic semiconductors
Materials Horizons / Jan 01, 2020
Iqbal, H. F., Holland, E. K., Anthony, J. E., & Jurchescu, O. D. (2020). Real-time monitoring of trap dynamics reveals the electronic states that limit charge transport in crystalline organic semiconductors. Materials Horizons, 7(9), 2390–2398. https://doi.org/10.1039/d0mh00706d
Optical band gap and infrared phonon modes of (La_029Sr_071)(Al_065Ta_036)O_3 (LSAT) single crystal from infrared to ultraviolet range spectroscopic ellipsometry
Optical Materials Express / Sep 22, 2016
Barnes, A., Haneef, H., Schlom, D. G., & Podraza, N. J. (2016). Optical band gap and infrared phonon modes of (La_029Sr_071)(Al_065Ta_036)O_3 (LSAT) single crystal from infrared to ultraviolet range spectroscopic ellipsometry. Optical Materials Express, 6(10), 3210. https://doi.org/10.1364/ome.6.003210
Crystal engineering of alkylethynyl fluoroanthradithiophenes
Molecular Systems Design & Engineering / Jan 01, 2022
Thorley, K. J., Dremann, D., Iqbal, H. F., Parkin, S. R., Jurchescu, O. D., & Anthony, J. E. (2022). Crystal engineering of alkylethynyl fluoroanthradithiophenes. Molecular Systems Design & Engineering, 7(4), 374–380. https://doi.org/10.1039/d1me00158b
Importance of Electric-Field-Independent Mobilities in Thick-Film Organic Solar Cells
ACS Applied Materials & Interfaces / Oct 11, 2022
Ho, C. H. Y., Pei, Y., Qin, Y., Zhang, C., Peng, Z., Angunawela, I., Jones, A. L., Yin, H., Iqbal, H. F., Reynolds, J. R., Gundogdu, K., Ade, H., So, S. K., & So, F. (2022). Importance of Electric-Field-Independent Mobilities in Thick-Film Organic Solar Cells. ACS Applied Materials & Interfaces, 14(42), 47961–47970. https://doi.org/10.1021/acsami.2c11265
Organic thin-film transistors with flame-annealed contacts
Flexible and Printed Electronics / Mar 05, 2020
Waldrip, M., Iqbal, H. F., Wadsworth, A., McCulloch, I., & Jurchescu, O. D. (2020). Organic thin-film transistors with flame-annealed contacts. Flexible and Printed Electronics, 5(1), 014015. https://doi.org/10.1088/2058-8585/ab76e1
Education
Wake Forest University
Ph.D., Physics / May, 2021
University of Toledo
MSc, Physics / December, 2014
University of Peradeniya
B.Sc., Physics / September, 2011
Experience
Wake Forest University
Graduate Research Assistant / August, 2017 — May, 2021
• Fabricated and electrically characterized thin film and single-crystal organic field-effect transistors • Developed a quick and reliable diagnostic tool to screen for potential degradation pathways in organic field-effect transistors by accessing the trap density of states • Fabricated operationally and environmentally stable small molecule and polymer field-effect transistors with remarkable threshold voltage stability in ambient air • Mentored undergraduate and graduate students
Wake Forest University
Graduate Teaching Assistnat / August, 2016 — May, 2017
• Instructed introductory physics laboratory course (PHY 110L), Fall 2016 • Conducted tutorial sessions for undergraduate physics majors, Fall 2016 • Graded tutorials, Electronics lab (PHY 230L), Spring 2017
North Carolina State University
Postdoctoral Research Scholar / August, 2021 — July, 2023
• Fabricated and characterized organic light-emitting diodes and organic photodiodes • Developed a novel method of fabricating transparent privacy organic light-emitting diodes • Mentored graduate and undergraduate students
Part-time Lecturer / August, 2022 — December, 2022
• Instructed Microelectronic materials course (MSE 460), Fall 2022 • Instructed Microelectronic materials science and technology course (MSE 560), Fall 2022
University of Toledo
Graduate Research Assistant / August, 2012 — July, 2014
• Used spectroscopic ellipsometry to study the optical properties of various materials and solar cell devices over a wide spectral range (0.035 – 6.5 eV: 33 µm – 190 nm) • Fabricated and characterized amorphous silicon single junction solar cells in the n-i-p/p-i-n configurations • Mentored undergraduate and graduate students
Ford Motor Company
Intern / August, 2014 — December, 2014
• Evaluated the manufacturing viability of scratch and UV-resistant coatings for automotive body parts • Used Infrared spectroscopic ellipsometry to detect changes in the optical properties of polycarbonate samples infused with UV-absorbing molecules • Developed a new time-saving and cost-effective ellipsometry data analysis technique to determine the penetration depth of infused molecules into polycarbonate samples
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