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


Probing the emission zone length in organic light emitting diodes via photoluminescence and electroluminescence degradation analysis
Peng, C., Salehi, A., Chen, Y., Danz, M., Liaptsis, G., & So, F. (2017), ACS Applied Materials & Interfaces, 9(47), 41421-41427.
In search of deeper blues: Trans-N-heterocyclic carbene platinum phenylacetylide as a dopant for phosphorescent OLEDS
Bullock, J. D., Salehi, A., Zeman, C. J., Abboud, K. A., So, F., & Schanze, K. S. (2017), ACS Applied Materials & Interfaces, 9(47), 41111-41114.
Organic molecular light-emitting materials and devices
So, F., & Shi, J. M. (2017), Introduction to Organic Electronic and Optoelectronic Materials and Devices, 2nd edition, , 363-385.
Transparent indium-tin oxide/indium-gallium-zinc oxide Schottky diodes formed by gradient oxygen doping
Ho, S., Yu, H., & So, F. (2017), Applied Physics Letters, 111(21).
Organic molecular light-emitting materials and devices
So, F., & Shi, J. M. (2017), Introduction to Organic Electronic and Optoelectronic Materials and Devices, 2nd edition, , 363-385.
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., Lee, C. S., So, F., & Tsang, S. W. (2017), Solar RRL, 1(9).
Ultraviolet-ozone surface modification for non-wetting hole transport materials based inverted planar perovskite solar cells with efficiency exceeding 18%
Xu, X. W., Ma, C. Q., Cheng, Y. H., Xie, Y. M., Yi, X. P., Gautam, B., Chen, S. M., Li, H. W., Lee, C. S., So, F., & Tsang, S. W. (2017), Journal of Power Sources, 360, 157-165.
effect of polymer-fullerene interaction on the dielectric properties of the blend
Constantinou, I., Yi, X. P., Shewmon, N. T., Klump, E. D., Peng, C., Garakyaraghi, S., Lo, C. K., Reynolds, J. R., Castellano, F. N., & So, F. (2017), Advanced Energy Materials, 7(13).
Strong polymer molecular weight-dependent material interactions: Impact on the formation of the polymer/fullerene bulk heterojunction morphology
Kim, J. H., Gadisa, A., Schaefer, C., Yao, H. F., Gautam, B. R., Balar, N., Ghasemi, M., Constantinou, I., So, F., O'Connor, B. T., Gundogdu, K., Hou, J. H., & Ade, H. (2017), Journal of Materials Chemistry A, 5(25), 13176-13188.
Highly efficient organic light-emitting diode using a low refractive index electron transport layer
Salehi, A., Ho, S., Chen, Y., Peng, C., Yersin, H., & So, F. (2017), Advanced Optical Materials, 5(11).

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