Di-n-Propylammonium iodide can be utilized in the fabrication of lead iodide-based perovskite layers, which serve as light-absorbing and charge transport materials in perovskite solar cells. In addition, DNPAI-based perovskite materials have been explored for applications in LEDs, where they serve as emissive layers.', 'Organohalide based perovskites have emerged as an important class of material for solar cell applications. The variations/substitution in organohalide cations and anions is employed for the optimization of the band gap, carrier diffusion length, and power conversion efficiency of perovskites based solar cells.