Galvano-magnetic effects in germanium at high frequencies

✍ Scribed by B. Donovan; G. Reichenbaum

• Book ID: 104162152
• Publisher: Elsevier Science
• Year: 1954
• Weight: 127 KB
• Volume: 20
• Category: Article
• ISSN: 0031-8914
• DOI: 10.1016/s0031-8914(54)80214-x

✦ Synopsis

For various specimens, values of ~/from 40% to 150% ~were obtained 4). Figure 3 shows the spectral distribution of sensitivity for PbS. It is seen that ~1/, ----3.02/~, corresponding to 0.41 eV. As ~ ~ 1 this can be taken as the intrinsic optical activation energy.

Values of lifetime obtained from equation ( 5), together with values from direct observation of the time-of-rise of photo-conductivity, from diffusion lengths and from the magnitude of i s are shown in figure 4. With the latter method values of < 10 -9 sec. were measured. Comparison with the straight line shows the data may in general be represented by T o¢ (resistivity) 2 or T o¢ (carrier concentration)-2. Such a relation indicates that the Auger effect is the predominant recombination mechanism --in agreement with P i n c h e r 1 e's theoretical calculations *). He estimates that vn 2 ~ 3 X 1027 cm-6 see., whereas the line of figure 4 represents ~n 2 ~ 5 x 1027 cm -6 sec.