Peer Reviewed Conference Proceeding Papers

  1. Riley Q. McKeough, Daniel P. Furr, Fan Zhang, Yong Zhang, and Susan R. Trammell, Light-assisted drying (LAD) for anhydrous preservation of biologics: using Raman spectroscopy to assess the uniformity of drying in processed samples, Proc. SPIE 11230, Optics and Biophotonics in Low Resource Settings VI, 112300K (21 February 2020). (pdf)
  2. Yong Zhang, Light effect transistors for high speed and low energy switching and beyond, J. Phys.: Conf. Ser. 1537 012004 (2020). (pdf)
  3. Keming Ren, Tang Ye, Yong Zhang, Abasifreke Ebong, The Role of Nano-crystallites on Conduction Mechanisms of Current Through Ag Gridlines of Si Solar Cells, MRS Adv. 4, 311 (2019). (pdf)
  4. Changkui Hu, Qiong Chen, Fengxiang Chen, Heng Lv, T.H. Gfroerer, M.W. Wanlass, and Yong Zhang, Determining the spatial profiles of electron and hole concentration, radiative and non-radiative recombination rate near a dislocation defect by combining Raman and photoluminescence imaging, WCPEC-7 & IEEE PVSC 46 (Hawaii, 2018). (pdf)
  5. Chen, B.S. McKeon, J. Becker, S. Zhang, C.-K. Hu T.H. Gfroerer, M.W. Wanlass, Y.-H. Zhang, D.J. Smith, and Y. Zhang, Correlative characterization of dislocation defects and defect clusters in GaAs and CdTe solar cells by spatially resolved optical techniques and high-resolution TEM, WCPEC-7 & IEEE PVSC 46 (Hawaii, 2018). (pdf)
  6. H. Gfroerer, Ben Stroup, Yong Zhang, and Zhiqiang Liu, Inhomogeneous electroluminescence for characterizing lateral transport in semiconductor devices, WCPEC-7 & IEEE PVSC 46 (Hawaii, 2018). (pdf)
  7. Keming Ren, Veysel Unsur, Ahrar Chowdhury, Yong Zhang, Abasifreke Ebong, The impact of tellurite glass on contact resistance of the fire through dielectric (FTD) c-Si solar cell with lightly doped emitter, WCPEC-7 & IEEE PVSC 46 (Hawaii, 2018). (pdf)
  8. Qiong Chen, Sergio Bernardi, and Yong Zhang, Nondestructive High-Power-High-Temperature Raman Spectroscopy for Probing Microscopic Structural Variations in CZTSe Alloys, MRS Adv. 2, 3187 (2017). (pdf)
  9. Qiong Chen, Sergio Bernadi, and Yong Zhang, Spatially-resolved high-power high-temperature Raman spectroscopy as an effective tool for probing the microscopic structural variations in complex alloys: CZTSe as an example, 43rd IEEE Photovoltaic Specialists Conference (Portland, 2016). (pdf)
  10. Qiong Chen and Yong Zhang, Effects of elemental ratios in CZTSe film on CZTSe/CdS band alignment and inhomogeneity in absorber thermal conductivity, 43rd IEEE Photovoltaic Specialists Conference (Portland, 2016). (pdf)
  11. Qiong Chen, Henan Liu, Hui-Seon Kim, Yucheng Liu, Mengjin Yang, Naili Yue, Gang Ren, Kai Zhu, Shengzhong (Frank) Liu, Nam-Gyu Park, and Yong Zhang, Intrinsic Raman signatures of pristine hybrid perovskite CH3NH3PbI3 and its multiple stages of structure transformation, 43rd IEEE Photovoltaic Specialists Conference (Portland, 2016). (pdf)
  12. Qiong Chen, Henan Liu, Hui-Seon Kim, Yucheng Liu, Mengjin Yang, Naili Yue, Gang Ren, Kai Zhu, Shengzhong (Frank) Liu, Nam-Gyu Park, and Yong Zhang, Intrinsic Raman signatures of pristine hybrid perovskite CH3NH3PbI3 and its multiple stages of structure transformation, 43rd IEEE Photovoltaic Specialists Conference (Portland, 2016).
  13. H. Gfroerer, B. J. Stroup, Yong Zhang, Zhiqiang Liu, Combining Photoluminescence and Photocurrent Measurements to Distinguish Non-radiative Losses, 43rd IEEE Photovoltaic Specialists Conference (Portland, 2016). (pdf)
  14. C. Lew Yan Voon, J. Wang, Y. Zhang, M. Willatzen, Band parameters of phosphorene, Journal of Physics: Conference Series 633, 012042 (2015). 4th International Conference on Mathematical Modeling in Physical Sciences (IC-MSquare 2015). (pdf)
  15. Henan Liu, Qiong Chen, Hui-Seon Kim, Nam-Gyu Park, and Yong Zhang, Effects of domain size in polycrystalline perovskite organic-inorganic hybrids investigated by spatially resolved optical spectroscopy, 42nd IEEE Photovoltaic Specialists Conference (New Orleans, 2015). (pdf)
  16. Yue Lin, Yong Zhang, Zhiqiang Liu, Tongbo Wei, and Zhong Chen, Spatially Resolved Study of the EQE Droop in InGaN QW LEDs: Interplay of Point Defects, Extended Defects, and Carrier Localization, in Wide Bandgap Semiconductor Materials and Devices 15 issues, ECS Transactions (Orlando, 2014), edited by F. Ren. (pdf)
  17.  Qiong Chen and Yong Zhang, Correlating Multiple Spatially-Resolved Techniques (LBIC/Raman/PL/Reflectance/SEM/AFM) in the Study of Microscopic inhomogeneity of Thin-Film Solar Cells: Cu2ZnSnSe4 as an Example, 40th IEEE Photovoltaic Specialists Conference (Denver, 2014).
  18. Fengxiang Chen, Yong Zhang, T. H. Gfroerer, A. N. Finger, and M. W. Wanlass, Modeling Photoluminescence Spatial Mapping of an Isolated Defect under Uniform and Selective Excitation, 39th IEEE Photovoltaic Specialists Conference (Orlando, 2013). (pdf)
  19. Qiong Chen, Naili Yue, and Yong Zhang, Micro-Raman/PL and Micro-LBIC studies of CZTSe materials and PV devices, 39th IEEE Photovoltaic Specialists Conference (Orlando, 2013). (pdf)
  20. T. H. Gfroerer, Y. Zhang, and M. W. Wanlass, A comparison of photoluminescence imaging and confocal photoluminescence microscopy in the study of diffusion near isolated extended defects in GaAs, 38th IEEE Photovoltaic Specialists Conference (Austin, 2012). (pdf)
  21. N. Yue, Y. Zhang, and R. Tsu, Selective Formation of Graphene on a Si Wafer, MRS Proceedings 1407, mrsf11-1407-aa05-68 (2012). (pdf)
  22. Y. Zhang, D. Li, Z. Wu, J. Zheng, X. Lin, H. Zhan, S. Li, J. Kang, J. Bleuse, L. Grenet, D. Rapisarda, and H. Mariette, ZnO/ZnSe Type II Core-Shell Nanowire Array Solar Cell, MRS Proceedings 1396, mrsf11-1396-o02-07 (2012). (pdf)
  23. R.G. Dhere, Y. Zhang, M.J. Romero, S. E. Asher, M. Young, B. To, R. Noufi, and T.A. Gesser, Investigation of junction properties of CdS/CdTe solar cells and their correlation to device properties, Proc. IEEE-33th PV Specialist Meeting (2008). (pdf)
  24. Y. Zhang, J. Pern, A. Mascarenhas, and W. Zhou, Searching for optimal solar-cell architectures, in SPIE Newsroom, 2008. (pdf)
  25. A. Mascarenhas, S. Francoeur, M.J. Seong, B. Fluegel, Y. Zhang, and M.W. Wanlass, High-Efficiency Solar Cell Concepts: Physics, Materials, and Devices, Proceedings of 2004 DOE Solar Energy Technologies Program Review Meeting  (October 25-28, 2004, Denver, Colorado). (pdf)
  26. Y. Zhang and A. Mascarenhas, Effects due to and derived from spontaneous ordering in III-V semiconductors, Mat. Res. Soc. Symp. Proc. 794, 279-290 (2004) (An invited talk). (pdf)
  27. Z. Y. Xu, X. D. Luo, X. D. Yang, P. H. Tan, C. L. Yang, W. K. Ge, Y. Zhang, A. Mascarenhas, H. P. Xin, C. W. Tu, Optical Study of Localized and Delocalized States in GaAsN/GaAs, Mat. Res. Soc. Symp. Proc. 798, pp. 695-700 (2004). (pdf)
  28. X. Wu, R. G. Dhere, Y. Yan, M. J. Romero, Y. Zhang, J. Zhou, C. DeHart, A. Duda, C. Perkins, and B. To, High-Efficiency Polycrystalline CdTe Thin-Film Solar Cells with an Oxygenated Amorphous CdS (a-CdS:O) Window Layer, Proceedings of the 29th IEEE PVSC, 531 (2002). (pdf)
  29. Y.J. Wang, X. Wei, Y. Zhang, A. Mascarenhas, H. P. Xin, Y. G. Hong, and C. W. Tu, High field magneto-optical study of electronic states near the band edge of GaAs1-xNx, Proceedings of the 15th International Conference on High Magnetic Fields in Semiconductor Physics.
  30. A. Mascarenhas and Y. Zhang, Electronic structure of nitrogen doped GaAs and GaP, in Gallium-Nitride-based Technologies, Edited by M. Osinski (SPIE optical Engineering Press, 2002), p.219. (pdf)
  31. E. D.  Jones, K. K. Bajaj, G. Coli, S. Crooker, Y. Zhang, A. Mascarenhas, and J. M. Olson, Exciton diamagnetic shifts and magnetic field dependent linewidths in ordered and disordered InGaP alloys, Mat. Res. Soc. Symp. Proc. 692, 313 (2002). (pdf)
  32. Y. Zhang, B. Fluegel, M. Hanna, A. Duda, and A. Mascarenhas, Electronic structure near the band gap of heavily nitrogen doped GaAs and GaP, Mat. Res. Soc. Symp. Proc. 692, 49 (2002) (An invited talk). (pdf)
  33. T.H. Wang, T.F. Ciszek, and Y. Zhang, Calibration Factors for Lifetime Measurements on Si Ingots with a Localized PCD Method, Proc. 28th IEEE Photovoltaic Specialists Conf. (2000, Anchorage, AK, USA), pp.
  34. Y. Zhang, A. Mascarenhas, S. K. Deb, H. P. Xin, and C. W. Tu, Heavily nitrogen-doped III-V semiconductors for high-efficiency solar cells, Proc. 28th IEEE Photovoltaic Specialists Conf. (2000, Anchorage, AK, USA), pp.1189 (2001). (pdf)
  35. Y. Zhang, S. Francoeur, A. Mascarenhas, H. P. Xin, and C. W. Tu, Electronic Structure of Heavily and Randomly Nitrogen Doped GaAs near the Fundamental Band Gap, phys. stat. sol. (b) 228, No. 1, 287–291 (2001).
  36. R. A. Ahrenkiel, A. Mascarenhas, S. W. Johnston, Y. Zhang, D. J. Friedman, and S. M. Vernon, Photoconductive Properties of GaAs1-xNx double Heterostructures as a Function of Excitation Wavelength, Mat. Res. Soc. Symp. Proc. 607, 265 (2000). (pdf)
  37. H.M. Cheong, Y. Zhang, A. Norman, A. Mascarenhas, K.Y. Cheng, and K.C. Hsieh, Profiling Composition Variations in Composition Modulated GaP/InP Short Period Superlattices using Resonance Raman Scattering, Mat. Res. Soc. Symp. Proc. 583, 361 (2000). (pdf)
  38. Y. Zhang, B. Fluegel, S.P. Ahrenkiel, D. J. Friedman, J.F. Geisz, J.M. Olson, and A. Mascarenhas, Electronic and Optical Properties of Micro Ordered Domain Twins in GaInP Alloys, Mat. Res. Soc. Symp. Proc. 583, 255 (2000). (pdf)
  39. R. L. Forrest, E. D. Meserole, R. T. Nielsen, M. S. Goorsky, Y. Zhang, A. Mascarenhas, M. Hanna, and S. Francoeur, Single and Double Variant CuPt-B Ordered GaInAs, Mat. Res. Soc. Symp. Proc. 583, 249 (2000). (pdf)
  40. S.P. Ahrenkiel, K.M. Jones, R.J. Matson, M. Al-Jasim, Y. Zhang, and A. Mascarenhas, CuPt Ordered Microstructures in GaInP and GaInAs films, Mat. Res. Soc. Symp. Proc. 583, 243 (2000). (pdf)
  41. S. J. Pennycook, Y. Yan, A. Norman, Y. Zhang, M. Al-Jassim, A. Mascarenhas, S. P. Ahrenkiel, M. F. Chisholm, G. Duscher, and S. T. Pantelides, Atomic-Resolution Z-Contrast Imaging and Its Application to Compositional Ordering and Segregation, Mat. Res. Soc. Symp. Proc. 583, 235 (2000).(pdf)
  42. R. D Twesten, D. M Follstaedt, J Mirecki Millunchick, S. R. Lee, A. G. Norman, S.P. Ahrenkiel, J. L. Reno, E D Jones, A Mascarenhas, and Y. Zhang, Composition distribution in laterally modulated InAlAs films, Proc. MSA Meeting, Aug. 1999, Microsc. Micoanal. 5 (Suppl 2: Proceedings) (1999) p174.
  43. Y. Zhang and A. Mascarenhas, Scaling of Exciton Binding Energy in Semiconductor Quantum Wells and Wires, in  “Excitonic Processes in Condensed Matter”, R. T. Williams and W. M. Yen, Editors, PV 98-25, p. 222, The Electrochemical Society Proceedings Series, Pennington, NJ (1998).
  44. A. Mascarenhas, Y. Zhang, J. Mirecki Millunchick, R. D. Twesten, and E. D. Jones, Lateral superlattice solar cells, Proceedings of Future generation Photovoltaic Technologies, First NREL Conference, ed. R. McConnell, p.303 (1997). (pdf)
  45. E. D. Jones, J. Mirecki Millunchick, D. M. Follstaedt, M. Hafich, S. R. Lee, J. Reno, R. D. Twesten, Y. Zhang, and A. Mascarenhas, Detection of lateral composition modulation in a (InAs)n/(GaAs)n short period superlattice on InP by magnetoexciton spectroscopy, SPIE Int. Symp. on Optoelectronics  Proc. 2994, 468 (1997). (pdf)
  46. R. D. Twesten, J. Mirecki-Millunchick, S. P. Ahrenkiel, Y. Zhang, S. R. Lee, D. M. Follstaedt, A. Mascarenhas, and E. D. Jones, Microstructure of compositionally modulated InAlAs, Mat. Res. Soc. Symp. Proc. Vol.441, 187 (1997). (pdf)
  47. Y. Zhang, P. Ernst, F. A. J. M. Driessen, A polarization study of ordered GaInP2, Mat. Res. Soc. Symp. Proc. Vol. 417, 61 (1996). (pdf)
  48. P. Ernst, C. Geng, G. Hahn, F. Scholz, H. Schweizer, Y. Zhang, and A. Mascarenhas, Optical Properties of ordered GaInP2, Mat. Res. Soc. Symp. Proc. Vol. 417, 19 (1996). (pdf)