In this report, we studied the effect of partial substitution of Pb²⁺ by Co²⁺ on environmental stability and performance of methylammonium lead iodide (MAPbI₃) based resistive switching (RS) device. The substitution of Co²⁺ enhances the environmental stability of MAPbI₃ thin films and their RS performance. Raman spectroscopy and density functional theory (DFT) calculations further revealed that the Co²⁺ substituted MAPbI₃ thin films show improved environmental stability compared to undoped MAPbI₃ by increasing the strength of hydrogen bonds formed between inorganic octahedra and organic cation (I….….H). The Co²⁺ substitution (5 at%) lowers the switching voltage and increase the separation between high resistance state (HRS) and low resistance state (LRS) currents of the RS device compared to undoped MAPbI₃ device. The scanning electron microscopy (SEM) results indicate that the substitution of Co²⁺ also enhances the uniformity and compactness of MAPbI₃ films, leading improved performance of the RS device.

在本报告中，我们研究了用Co ²⁺部分取代Pb ²⁺对基于甲基铵碘化铅（MAPbI ₃）的电阻开关（RS）器件的环境稳定性和性能的影响。Co ²⁺的取代增强了MAPbI ₃薄膜的环境稳定性及其RS性能。拉曼光谱法和密度泛函理论（DFT）计算进一步表明，与未掺杂的MAPbI ₃相比，Co ²⁺取代的MAPbI ₃薄膜通过增加无机八面体与有机阳离子之间形成的氢键强度（I .....…）显示出改善的环境稳定性。 。H）。钴²⁺与未掺杂的MAPbI ₃器件相比，替代（5 at％）降低了开关电压，并增加了RS器件的高电阻状态（HRS）和低电阻状态（LRS）电流之间的间隔。扫描电子显微镜（SEM）结果表明，Co ²⁺的取代还增强了MAPbI ₃膜的均匀性和致密性，从而改善了RS器件的性能。