Franky So

Walter and Ida Freeman Distinguished Professor

  • Engineering Building I (EB1) 3070B

Franky So started his career as a research scientist working on polymer optical modulators at Hoechst Celanese Research Division. In 1993, he joined Motorola and then became the Head of the OLED research group. In 2001, and he joined OSRAM Opto Semiconductors and became the Head of OLED Research. He joined the University of Florida in 2005 and became the Rolf E. Hummel Professor in Electronic Materials in the Department of Materials Science and Engineering at the University of Florida. In 2015, he joined the Department of Materials Science and Engineering at the North Carolina State University where he is currently the Walter and Ida Freeman Distinguished Professor. While at Motorola, he was named the Distinguished Innovator and Master Innovator. He was the recipient of the DOE Solid State Lighting Program Significant Achievement Awards. Dr. So holds 80 issued patents and has published more than 160 peer-reviewed articles with a Google H-index of 63. He is the Editor-in-Chief of the journal Materials Science and Engineering Reports and serves as an Associate Editor for IEEE Journal of Photovoltaics, IEEE Journal of Display Technology, SPIE Journal of Photonic Technology and Organic Electronics. So is a Distinguished Lecturer of the IEEE Photonics Society, a Charter Fellow of the National Academy of Inventors, a Fellow of IEEE, OSA and SPIE.

So’s current research focus is on electronics properties and photophysics of organic semiconductors and quantum dots used for OLEDs, solar cells, photodetectors, sensors and transistors. His recent works include: use of corrugated structures to fabricate OLEDs and perovskite solar cells, charge transport, injection and charge transfer excitons in organic semiconductors, dielectric properties of polymer-fullerene blends for photovoltaics, vertical permeable metal base transistors, vertical field effect transistors, PbS quantum dots photodetectors and phototransistors, and ferroelectric transistors.



Ph.D. 1991

Electrical Engineering

University of Southern California

M.S. 1982

Materials Science

Massachusetts Institute of Technology

B.A. 1979


Hamilton College


The Critical Impact of Material and Process Compatibility on the Active Layer Morphology and Performance of Organic Ternary Solar Cells
Kim, J.-H., Schaefer, C., Ma, T., Zhao, J., Turner, J., Ghasemi, M., … Ade, H. (2019), ADVANCED ENERGY MATERIALS, 9(2).
Donor Conjugated Polymers with Polar Side Chain Groups: The Role of Dielectric Constant and Energetic Disorder on Photovoltaic Performance
Xu, B., Yi, X., Huang, T.-Y., Zheng, Z., Zhang, J., Salehi, A., … Reynolds, J. R. (2018), ADVANCED FUNCTIONAL MATERIALS, 28(46).
Every atom counts: Elucidating the fundamental impact of structural change in conjugated polymers for organic photovoltaics
Lo, C. K., Gautam, B. R., Selter, P., Zheng, Z. L., Oosterhout, S. D., Constantinou, I., … Reynolds, J. R. (2018), Chemistry of Materials, 39(9), 2995–3009.
Flexoelectricity in a metal/ferroelectric/semiconductor heterostructure
Huang, S. J., Yau, H. M., Yu, H., Qi, L., So, F., Dai, J. Y., & Jiang, X. N. (2018), AIP Advances, 8(6).
Manipulating refractive index in organic light-emitting diodes
Salehi, A., Chen, Y., Fu, X. Y., Peng, C., & So, F. (2018), ACS Applied Materials & Interfaces, 10(11), 9595–9601.
Randomly Distributed Conjugated Polymer Repeat Units for High-Efficiency Photovoltaic Materials with Enhanced Solubility and Processability
Xu, B., Pelse, I., Agarkar, S., Ito, S., Zhang, J., Yi, X., … Reynolds, J. R. (2018), ACS APPLIED MATERIALS & INTERFACES, 10(51), 44583–44588.
Side-Chain Sequence Enabled Regioisomeric Acceptors for Conjugated Polymers
Luo, X., Tran, D. T., Kadlubowski, N. M., Ho, C. H. Y., Riley, P., So, F., & Mei, J. (2018), MACROMOLECULES, 51(21), 8486–8492.
Sub-band gap turn-on near-infrared-to-visible up-conversion device enabled by an organic-inorganic hybrid perovskite photovoltaic absorber
Yu, H., Cheng, Y. H., Li, M. L., Tsang, S. W., & So, F. (2018), ACS Applied Materials & Interfaces, 10(18), 15920–15925.
langmuir-blodgett thin films of diketopyrrolopyrrole-based amphiphiles
Lo, C. K., Wang, C. Y., Oosterhout, S. D., Zheng, Z. L., Yi, X. P., Fuentes-Hernandez, C., … Reynolds, J. R. (2018), ACS Applied Materials & Interfaces, 10(14), 11995–12004.
18% high-efficiency air-processed perovskite solar cells made in a humid atmosphere of 70% RH
Cheng, Y. H., Xu, X. W., Xie, Y. M., Li, H. W., Qing, J., Ma, C. Q., … Tsang, S. W. (2017), Solar RRL, 1(9).

View all publications via NC State Libraries

View publications on Google Scholar