Skip to main content Accessibility help

Origins of Contrast in Near-Field Scanning Optical Microscopy Photovoltage Images of Cu(In,Ga)Se2 Solar Cells

  • A. A. McDaniel (a1) and J. W. P. Hsu (a1)


Photovoltage images of Cu(In,Ga)Se2 solar cells taken using near-field scanning optical microscopy (NSOM) show reduction of photoresponse along grain boundaries. Two factors might be responsible for this contrast. The first is that the topographic changes associated with the grains could cause the NSOM tip to move further from the sample, resulting in a reduction in photoresponse. The second possibility is that the contrast is due to real physical properties of the sample, e.g. higher recombination velocities near grain boundaries. We show convincing evidence that the major contribution to the contrast in the photovoltage images is due to the latter.



Hide All
2 McDaniel, A. A., Hsu, J. W. P., and Gabor, A. M., submitted to Appl. Phys. Lett.
2 Weston, Kenneth D., DeAro, Jessie A., and Buratto, Steven K., Rev. Sei. Instrum. 67(8), 2924 (1996).
3 Weston, Kenneth D. and Buratto, Steven K., to appear in J. Phys. Chem.
4 Betzig, E., Trautman, J. K., Harris, T. D., Weiner, J. S., and Kostelak, R. L., Science 251, 1468 (1991).
5 Hsu, J. W. P., Lee, M., Deaver, B. S., Rev. Sci. Instrum. 66, 3177 (1995);
Lee, Mark, McDaniel, E. B., and Hsu, J. W. P., Rev. Sei. Instrum. 67, 1468 (1996).
6 Gabor, Andrew M., Tuttle, John R., Albin, David S., Contreras, Miguel A., Noufi, Rommel, and Hermann, Allen M., Appl. Phys. Lett. 65(2), 198 (1994).


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed