Differential electric capacity of space charge layers

2 Differential electric capacity of space charge layers 

In the same way as described in Sec. 5.2 for a diifiise layer in aqueous solution, the differential electric capacity, Csc, of a space charge layer of semiconductors can be derived from the Poisson s equation and the Fermi distribution function (or approximated by the Boltzmann distribution) to obtain Eqn. 5-69 for intrinsic semiconductor electrodes [(Serischer, 1961 Myamlin-Pleskov, 1967 Memming, 1983]  

Further, the capadty of the space charge layer of n-type or p-fype semiconductor electrodes, in which all the donors or acceptors are ionized, has been derived as shown in Eqn. 5-70 [Gterischer, 1961]  

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