Table 2 Time constants obtained from Eq. 1 that corresponds to PD and PB for a- GexAs35−xSe65 films. The subscript d and b refer to darkening and bleaching, respectively

From: Role of Ge:As ratio in controlling the light-induced response of a-GexAs35−xSe65 thin films

Sample

τd (sec)

βd

ΔTSd

τb (sec)

βb

ΔTSb

Ge5As30Se65

25

0.45

0.87

0

0

0

Ge10As25Se65

25

0.65

0.84

0

0

0

Ge15As20Se65

26

0.65

0.90

980

0.65

0.05

Ge25As10Se65

38

0.58

0.94

1896

0.80

0.28