“…They are manufactured using homogeneous composition bulk crystals and epilayers as well. Recent advances in the closed [3] and open tube [4 to 91 isothermal vapour phase epitaxy (IS0 VPE) of Hgl-,Cd,Te makes this method to be one of the most promising for fabrication of low cost, large area, device quality epilayers. Graded gap Hgl _,Cd,Te layers have been successfully used for fabrication of photodiodes [4, ti, 7, 10, 111.…”