![]() ![]() ![]() X-ray diffraction (XRD) analysis was performed to investigate the crystallinity of the MAPbI 3 films. These results suggest that the 2D/3D perovskite films could effectively enhance the photoelectric performance and environmental stability of perovskite-based phototransistors. Furthermore, the 2D/3D perovskite-based phototransistor retained 90.2% and 82.3% of its photocurrent generation and photoresponsivity, respectively, after being subjected to air with 40% humidity for 14 days. The photoresponsivity of the optimized 2D/3D perovskite-based phototransistor (5.27 × 10 −2 A/W) was observed to be 2.08 times greater than that of the 3D perovskite-based phototransistor (2.61 × 10 −2 A/W). ![]() Therefore, in this study, we fabricated mixed dimensional 2D/3D perovskite composite active layers to enhance the environmental stability of perovskite-based phototransistors without compromising their photoelectric properties. However, the interaction of the perovskite in conventional perovskite-based electronic devices with moisture in air typically leads to a low environmental stability of these devices. 3D organic–inorganic hybrid perovskites have been widely used in applications associated with the photovoltaic effect owing to their favorable optoelectronic characteristics. ![]()
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