Photothermal and photoconductive determination of surface and bulk defect densities in amorphous silicon films
Z E. Smith, V. Chu, K. Shepard, S. Aljishi, D. Slobodin, J. Kolodzey, S. Wagner and T. L. Chu “Photothermal and photoconductive determination of surface and bulk defect densities in amorphous silicon films” Appl. Phys. Lett. 50, 1521 (1987)