Organometal halide perovskites as hybrid light absorbers have been investigated and used in the fabrication of perovskite solar cells (PSCs) due to their low-cost, easy processability and potential for high efficiency.

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Many engineering applications can be modeled as differential equations (DE). No doubt it is very important for scientists and engineers know to solve differential equations, either ordinary differential equations (ODE), or partial differential equations (PDE) using numerical methods. Initial value ordinary differential equations arise in various fields such as physics and Engineering. This paper shows the method how to solve the initial value ordinary differential equation on some interval by using finite difference method in a very accurate manner with the formulation of error estimation.