1) “Thin-film CdTe cells: reducing the CdTe”, V. Plotnikov, X. Liu, N. Paudel, D. Kwon, K.A. Wieland, A.D. Compaan, Thin Solid Films (2011), DOI:10.1016/j.tsf.2010.12.179.
2) “Effects of post-deposition treatments on surfaces of CdTe/CdS solar cells”, S. Pookpanratana1, X. Liu (刘向鑫), N. R. Paudel, L. Weinhardt, M. Bär, Y. Zhang (张宇锋), A. Ranasinghe, F. Khan, M. Blum, W. Yang, A. D. Compaan, and C. Heske , App. Phys. Letter, 97, 172109 (2010).
3) “Chemical structure of buried interfaces in CdTe thin film solar cells”, S. Pookpanratana, F. Khan, Y. Zhang, C. Heske, L. Weinhardt, M. Bär, X. Liu, N. Paudel, and A. Compaan, 35rd IEEE P Photovoltaic Specialists Conference (PVSC), 000024-27, June 20-25, 2010, Honolulu, HA.
4) "Capacitance-Voltage Characterization of Solar Cells with CdS in CdTe Matrix”, R. Jha, X. Liu, K.A. Wieland, J. Ordosgoitti, N. Paudel, K. Sun, and A. Compaan, Mater. Res. Soc. Symp. Proc., Vol. 1260, 1260-T13-04, DOI: 10.1557/PROC-1260-T13-04, San Francisco, CA (Spring 2010).
5) “Migration and Oxidation of Sulphur at the Back Contact in CdTe Cells”, X. Liu, N.R. Paudel, and A. D. Compaan,K. Sun,L. Weinhardt, M. Bär, S. Pookpanratana, and C. Heske,O. Fuchs,W. Yang and J.D. Denlinger, 34th IEEE Photovoltaic Specialists Conference (PVSC), DOI: 002107-10, 10.1109/PVSC.2009.5411434 (2009). 6) “PIN Double-heterojunction Thin-film Solar Cell p-layer Assessment”, J.A. Spies, R. Schafer, J.F. Wager, P. Hersh, H.A.S. Platt, D.A. Keszler, G. Schneider, R. Kykyneshi, J. Tate, X. Liu, A.D. Compaan and W.N. Shafarman, Solar Energy Materials & Solar Cells, Vol 93, 1296-1308 (2009).
7) “XRF and High Resolution TEM Studies of Cu at the Back Contact in Sputtered CdS/CdTe Solar Cells”, Xiangxin Liu, A. D. Compaan, Kai Sun and Jeff Terry, 33rd IEEE Photovoltaic Specialists Conference (PVSC), 1-4, DOI:10.1109/PVSC.2008.4922458 (2008).
8) “Studies of Cu location near the back contact of CdS/CdTe solar cells”, Victor Plotnikov, Xiangxin Liu and Alvin D. Compaan, , Conference Record of the IEEE Photovoltaic Specialists Conference(PVSC), DOI:1-3, 10.1109/PVSC.2008.4922540 (2008).
9) “Cu K-edge EXAFS Studies Of CdCl2 Effect On CdTe Solar Cell”, Xiangxin Liu, A. D. Compaan, and Jeff Terry, Mater. Res. Soc. Symp. Proc. Vol. 865, F4.2, 2005.
10) “Photoluminescence from Ion Implanted CdTe Crystals”, Xiangxin Liu and Alvin D. Compaan, Mater. Res. Soc. Symp. Proc. Vol. 865, F5.25, 2005.
11) “Cu K-edge X-ray fine structure changes in CdTe with CdCl2 processing”, Xiangxin Liu, Alvin D. Compaan, Jeff Terry, Thin Solid Films, 480-481 (2005), pp. 95-98.
12) “X-ray Absorption Fine Structure Study of Aging Behavior of Oxidized Copper in CdTe Films”, Xiangxin Liu, Alvin D. Compaan and Jeff Terry, Conference Record of the IEEE Photovoltaic Specialists Conference, p.267-270 (2005). 13) “Cu K-edge EXAFS in CdTe before and after treatment with CdCl2”, Xiangxin Liu, Alvin D. Compaan, Nadia Leyarovska, and Jeff Terry, Mater. Res. Soc. Symp. Proc., Vol. 763, B3.5.1, 2003