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As numerical methods are sensitive to initial conditions assumed for solving the non-linear transcendental equations, improper selection of initial values may lead to failure of convergence. Therefore, proper initial values are need to be selected for achieving good convergence and it is discussed [15]. By rearranging equations (1.6), (1.7) and (1.9), the expressions for determining V_t, R_se and R_sh can be obtained as given in (1.10), (1.11) and (1.13), respectively.

(1.10)

(1.11)

Where

(1.12)

(1.13)

The above transcendental equations of V_t, R_se and R_sh need to be solved using either analytical or numerical approaches. Using the derived results, the parameters of I_LG and I_sat can be obtained from equations (1.4) and (1.5).