Zhengguo Xiao Department of Electrical Engineering Princeton University Tel:

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1 Zhengguo Xiao Department of Electrical Engineering Princeton University Tel: EDUCATION Ph.D. (Materials engineering) University of Nebraska-Lincoln August 2015 M.S. (Condensed matter physics) Chinese Academy of Sciences May 2011 B.S. (Applied physics) Shandong University of Science and Technology China June 2008 EXPERIENCE Postdoctoral researcher Princeton University 09/2015- present Teaching assistant University of Nebraska-Lincoln 09/ /2013 Research assistant University of Nebraska-Lincoln 08/ /2015 Research assistant Chinese Academy of Sciences 09/ /2011 RESEARCH INTERESTS Solar cells, light emitting devices, thin film electronics, organic-inorganic hybrid perovskites, and emerging semiconducting materials. SELECTED AWARDS Dec Graduate Student Award (Silver), MRS Fall meeting, 2015 April 2015 Outstanding Research Assistant Award (College of engineering, UNL) Dec Chinese Government Award for Outstanding Students Abroad May 2014 Dr. James C. and Joan. R. Wolford Fellowship for Outstanding Graduate Research Assistant (Department of Mechanical and Materials Engineering, UNL) April 2013 Student Travel Award, MRS 2013 spring meeting JOURNAL PUBLICATIONS ( indicates co-first author) (>4,500 citations) At Princeton University 41. Zhengguo Xiao, Ross A. Kerner, Lianfeng Zhao, Kyung Min Lee, Tae-Wook Koh, Barry P. Rand*. Efficient perovskite light emitting diodes featuring nanometre-sized crystallites, Nature Photonics 11, (2017) (most read paper) 40. Lianfeng Zhao, Yao-Wen Yeh, Nhu L Tran, Fan Wu, Zhengguo Xiao, Ross A Kerner, YunHui L Lin, Gregory D Scholes, Nan Yao, Barry P Rand, In Situ Preparation of Metal Halide Perovskite Nanocrystal Thin Films for Improved Light-Emitting Devices ACS nano 11 (4), (2017) 39. Lianfeng Zhao, Ross A Kerner, Zhengguo Xiao, YunHui Lisa Lin, Kyung Min Lee, Jeffrey Schwartz, Barry P Rand, Redox Chemistry Dominates the Degradation and Decomposition of Metal Halide Perovskite Optoelectronic Devices, ACS Energy Lett. 1, (2016) 38. Ross A Kerner, Lianfeng Zhao, Zhengguo Xiao, Barry P Rand, Ultrasmooth metal halide perovskite thin films via sol-gel processing, J. Mater. Chem. A 4, (2016)

2 At University of Nebraska 37. Zhengguo Xiao, Yongbo Yuan, Yuchuan Shao, Qi Wang, Qingfeng Dong, Cheng Bi, Pankaj Sharma, Alexei Gruverman and Jinsong Huang* Giant Switchable Photovoltaic Effect in Organometal Trihalide Perovskite Devices. Nature Materials, 14, (2015) (Highlighted as Cover, most read paper) 36. Zhengguo Xiao et al. Thin-Film Semiconductor Perspective of Organometal Trihalide Perovskite Materials for High Efficiency Solar Cells, Materials Science and Engineering Reports 101, 1-38 (2016) (Invited Review) 35. Zhengguo Xiao et al. Unraveling the Hidden Function of Stabilizer in Precursor in Improving Hybrid Perovskite Film Morphology for High Efficiency Solar Cells. Energy and Environmental Science 9, (2016) 34. Zhengguo Xiao, Qingfeng Dong, Hui Huang, Wenjing Tian, Jinsong Huang*, Efficiency Enhancement in Polymer Solar Cells with a Polar Small Molecule at Both Interface and in the Bulk Heterojunction Layer. IEEE, J. Photovoltaics, 5, 1408 (2015) 33. Zhengguo Xiao and Jinsong Huang, Energy Efficient Hybrid Perovskite Memristors and Synaptic Devices, Advanced Electronic Materials, 2, (2016) 32. Cheng Bi, Qi Wang, Yuchuan Shao, Yongbo Yuan, Zhengguo Xiao and Jinsong Huang, Nonwetting Surface Driven High Aspect Ratio Crystalline Grain Growth for Efficient Hybrid Perovskite Solar Cells, Nature Communications, 6, 7747 (2015) 31. Yehao Deng, Edwin Peng, Yuchuan Shao, Zhengguo Xiao, Qingfeng Dong and Jinsong Huang*, Scalable Fabrication of Efficient Organolead Trihalide Perovskite Solar Cells with Doctor- bladed Active Layers, Energy and Environmental Science, 8, 1544 (2015) 30. Peng Liu, Xiaoliang Liu, Lu Lyu, Haipeng Xie, Hong Zhang, Dongmei Niu, Han Huang, Cheng Bi, Zhengguo Xiao, Jinsong Huang, Yongli Gao, Interfacial electronic structure at the CH3NH3PbI3/MoOx interface, Applied Physics Letters 106 (19), , Yehao Deng, Zhengguo Xiao, and Jinsong Huang*, Light Induced Self-Poling Effect in Organometal Trihalide Perovskite Solar Cells for Increased Device Efficiency and Stability, Advanced Energy Materials, 5, (2015) (Journal Cover) 28. Yongbo Yuan, Jungseok Chae, Yuchuan Shao, Qi Wang, Zhengguo Xiao, Andrea Centrone and Jinsong Huang*, Photovoltaic Switching Mechanism in Lateral Structure Hybrid Perovskite Solar Cells, Advanced Energy Materials, 5, (2015) 27. Chenggong Wang, Congcong Wang, Xiaoliang Liu, John Kauppi, Yuchuan Shao, Zhengguo Xiao, Cheng Bi, Jinsong Huang and Yongli Gao*, Electronic structure evolution of fullerene on CH3NH3PbI3, Appl. Phys. Lett. 106, (2015) 26. Liang Shen,Yanjun Fang, Qingfeng Dong, Zhengguo Xiao, and Jinsong Huang* Improving the sensitivity of a near-infrared nanocomposite photodetector by enhancing trap induced hole injection, Appl. Phys. Lett. 106, (2015) 25. Miao Hu, Cheng Bi, Yongbo Yuan, Zhengguo Xiao, Qingfeng Dong, Yuchuan Shao, and, Jinsong Huang*. Distinct Exciton Dissociation Behavior of Organolead Trihalide Perovskite and Excitonic Semiconductors Studied in a Same Device. Small, 11, 2164 (2015) 24. Xiaoliang Liu, Chenggong Wang, Lu Lyu, Congcong Wang, Zhengguo Xiao, Cheng Bi, Jinsong Huang and Yongli Gao*, Electronic structures at the interface between Au and CH3NH3PbI3 in organometal trihalide perovskite-based solar cells, Physical Chemistry Chemical Physics, 17, (2015) 23. Rui Dong, Yanjun Fang, Jungseok Chae, Jun Dai, Zhengguo Xiao, Qingfeng Dong,Yongbo Yuan, Andrea Centrone, Xiao Cheng Zeng, Jinsong Huang*. High Gain and Low-Driving- Voltage Photodetectors Based on Organolead Triiodide Perovskites, Advanced Materials, 27, (2015) (Journal Cover) 22. Chenggong Wang, Xiaoliang Liu, Congcong Wang, Zhengguo Xiao, Cheng Bi, Yuchuan Shao, Jinsong Huang, Yongli Gao, Surface analytical investigation on organometal triiodide perovskite, Journal of Vacuum Science & Technology B 33 (3), (2015) (Most read)

3 21. Zhengguo Xiao, Qingfeng Dong, Cheng Bi, Yuchuan Shao, Yongbo Yuan and Jinsong Huang*, Solvent-Annealing of Perovskite Induced Crystal Growth for Photovoltaic Device Efficiency Enhancement. Advanced Materials, 26, (2014) 20. Zhengguo Xiao, Cheng Bi, Yuchuan Shao, Qingfeng Dong, Qi Wang, Yongbo Yuan, Chenggong Wang, Yongli Gao and Jinsong Huang*, Efficient, High Yield Perovskite Photovoltaic Devices Grown by Interdiffusion of Solution-Processed Precursor Stacking Layers. Energy and Environmental Science, 7, (2014) 19. Zhengguo Xiao, Yongbo Yuan, Bin Yang, Jeremy VanDerslice, Jihua Chen, and Jinsong Huang,* Universal Formation of Compositionally Graded Bulk Heterojunction for Efficiency Enhancement in Organic Photovoltaics, Advanced Materials, 26, (2014) 18. Yongbo Yuan, Zhengguo Xiao, Bin Yang and Jinsong Huang*, Arising Applications of Ferroelectric Materials in Photovoltaic Devices, Journal of Materials Chemistry A, 2, (2014) (Feature article) 17. Yuchuan Shao, Zhengguo Xiao, Cheng Bi, Yongbo Yuan, Jinsong Huang, Origin and elimination of photocurrent hysteresis by fullerene passivation in CH3NH3PbI3 planar heterojunction solar cells, Nature Communications 5, 5784 (2014) 16. Qi Wang, Yuchuan Shao, Qingfeng Dong, Zhengguo Xiao, Yongbo Yuan and Jinsong Huang*, Large Fill-Factor Bilayer Iodine Perovskite Solar Cells Fabricated by Low- Temperature Solution-Process. Energy and Environmental Science, 17, (2014) 15. Baodong Mao, Yongbo Yuan, Yuchuan Shao, Bin Yang, Zhengguo Xiao, and Jinsong Huang*, Alkylamine assisted ultrasound exfoliation of MoS2 naosheets and organic photovoltaic application, Nanoscience and Nanotechnology Letters, 6, (2014) 14. Rui Dong, Cheng Bi, Qingfeng Dong, Fawen Guo, Yongbo Yuan, Yanjun Fang, Zhengguo Xiao, and Jinsong Huang*, An Ultraviolet to Near Infrared Broad Spectral Nanocomposite Photodetector with Gain, Advanced Optical Materials, 2, (2014) 13. Bin Yang, Zhengguo Xiao, Yongbo Yuan, Jinsong Huang*, Polymer Aggregation Correlated Transition from Schottky-Junction to Bulk Heterojunction Organic Solar Cells. Appl. Phys. Lett. 104, (2014) 12. Yanjun Fang, Fawen Guo, Zhengguo Xiao, Jinsong Huang*, Large Gain, Low Noise Nanocomposite Ultraviolet Photodetectors with a Linear Dynamic Range of 120 db. Advanced Optical Materials, (2014) 11. Cheng Bi, Yuchuan Shao, Yongbo Yuan, Zhengguo Xiao, Chenggong Wang, Yongli Gao and Jinsong Huang*, Understanding the Formation and Evolution of Interdiffusion Grown Organolead Halide Perovskite Thin Films by Thermal Annealing. Journal of Materials Chemistry A, 2, (2014) 10. Zhengguo Xiao, Qingfeng Dong, Pankaj Sharma, Yongbo Yuan, Baodong Mao, Wenjing Tian, Alexei Gruverman and Jinsong Huang*, Synthesis and the Application of Ferroelectric P(VDF-TrFE) Nanoparticles in Organic Photovoltaic Devices for High Efficiency, Advanced Energy Materials, 3, (2013) 9. Bin Yang, Zhengguo Xiao, Yongbo Yuan, Tanjore V. Jayaraman, Jeffrey E. Shield, Ralph Skomski, and Jinsong Huang*, Room temperature organic ferromagnetism in the crystalline poly(3-hexylthiophene): phenyl-c61-butyric acid methyl ester blend film, Polymer, 54, (2013) 8. Hongli Zhu, Zhengguo Xiao, Detao Liu, Yuanyuan Li, Nicholas J. Weadock, Zhiqiang Fang, Jinsong Huang, and Liangbing Hu*, Biodegradable transparent substrates for flexible organic-light-emitting diodes, Energy and Environmental Science, 6, (2013) 7. Fawen Guo, Zhengguo Xiao, and Jinsong Huang*, Fullerene Photodetectors with Linear Dynamic-Range of 90 db Enabled by a Cross-Linkable Buffer Layer, Advanced Optical Material, 1, (2013) (Highlighted as Cover) 6. Baodong Mao, Qingfeng Dong, Zhengguo Xiao, Christopher L. Exstrom, Scott A. Darveau, Thomas E. Webber, Bjorn D. Lund, Hui Huang, Zhenhui Kang, and Jinsong Huang*, Zinc

4 Alloyed Iron Pyrite Ternary Nanocrystals for Band Gap Broadening, Journal of Materials Chemistry A, 1, (2013) (Highlighted as Cover) 5. Y. Lu, Z. Xiao, Y. Yuan, H. Wu, Z. An, Y. Hou, C. Gao and J. Huang*, Fluorine substituted thiophene-quinoxaline copolymer to reduce HOMO level and increase dielectric constant for high open circuit voltage organic solar cell, J. Mater. Chem. C, 1, (2013) 4. Bin Yang, Fawen Guo, Yongbo Yuan, Zhengguo Xiao, Yunzhang Lu, Qingfeng Dong, and Jinsong Huang*, Solution processed fullerene based organic Schottky-junction devices for large open circuit voltage organic solar cells, Advanced Materials, 25, (2013) ( Highlighted as Frontispiece) 3. Fawen Guo, Bin Yang, Yongbo Yuan, Zhengguo Xiao, Qingfeng Dong, Yu Bi, and Jinsong Huang*, A nanocomposite ultraviolet photodetector enabled by interfacial trap-controlled charge injection, Nature Nanotechnology, 7, , (2012) 2. Yongbo Yuan, Pankaj Sharma, Zhengguo Xiao, Shashi Poddar, Alexei Gruverman, Stephen Ducharme and Jinsong Huang*, Understanding the effect of ferroelectric polarization on power conversion efficiency of organic photovoltaic devices, Energy and Environmental Science, 5, 8558 (2012) (Cover Page and Hot Article) 1. Yunzhang Lu, Clement Alexander, Zhengguo Xiao, Yongbo Yuan, Runyu Zhang and Jinsong Huang*, Utilizing insulating nanoparticles as spacer in the laminated flexible polymer solar cells for improved mechanical stability, Nanotechnology 23, (2012) PRESENTATIONS AT INTERNATIONAL CONFERENCES 1. International Conference of Electroluminescence and Optoelectronic Devices (ICEL), Raleigh, North Carolina. Oct. 4 th Title: Stable and Efficient Perovskite Light Emitting Diodes via Self-assembled Nanometer-sized Crystallites. 2. MRS Fall meeting, Boston, MA, Nov. 30 th Title: Observation of Ion Electromigration in Perovskite Materials and Its Influence on Device Performance and Stability. 3. MRS Fall meeting, Boston, MA, Dec. 1 st Title: Unraveling the Function of Stabilizer Impurity in Improving Hybrid Perovskite Film Morphology for High Efficiency Solar Cells. (Poster) 4. Polychar23, Lincoln, Nebraska, May 11 th Title: Universal Formation of Compositionally Graded Bulk Heterojunction for Efficiency Enhancement in Organic Photovoltaics. 5. MRS Spring meeting, San Francisco CA, Apr. 7 th Title: Giant Switchable Photovoltaic Effect in Organometal Trihalide Perovskite Devices. 6. MRS Spring meeting, San Francisco CA, Apr. 25 th Title: Universal Formation of Compositionally Graded Bulk Heterojunction for Efficiency Enhancement in Organic Photovoltaics 7. MRS Fall meeting, Boston, MA, Dec. 1st Title: Increasing the Charge Diffusion Length of CH3NH3PbI3 to Beyond 1 micrometer by Solvent Annealing. (poster) 8. MRS Spring meeting, San Francisco, CA, 2013 Title: Synthesis and the Application of Ferroelectric P(VDF-TrFE) Nanoparticles in Organic photovoltaic Devices. BOOK CHAPTER 1. Wei Chen, Feng Liu, Ondrej E. Dyck, Gerd Duscher, Huipeng Chen, Mark D. Dadmun, Wei You, Qiquan Qiao, Zhengguo Xiao, Jinsong Huang, Wei Ma, Harald Ade, Jong K. Keum, Adam J. Rondinone, Karren L. More, and Jihua Chen, Nanophase Separation in Organic Solar Cells. Book chapter in Organic Solar Cells: Materials, Devices, Interfaces and Modeling by CRC Press PATENTS 1. Jinsong Huang, Zhengguo Xiao, Compositionally graded bulk heterojunction devices and

5 methods of manufacturing the same US Patent App. 15/042,692 (2016) 2. Jinsong Huang, Qingfeng Dong, Rui Dong, Yuchuan Sao, Cheng Bi, Qi Wang, Zhengguo Xiao Photovoltaic perovskite material and method of fabrication US Patent 9,391,287 (2016)