نوع مقاله : مقاله پژوهشی
نویسندگان
پژوهشکده فیزیک و شتابگرها، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 14155-1339، تهران- ایران
کلیدواژهها
عنوان مقاله English
نویسندگان English
Due to their better stability and high performance for X- and gamma-ray detection, quasi-two-dimensional (2D) lead halide perovskites have demonstrated excellent ability to be used in scintillators, compared to three-dimensional (3D) perovskites. In the current study, the stability of 2D-layered HA2CsPb2I7 was investigated relative to the α-CsPbI3 crystal structure. It is demonstrated that the charge transfer of hydrogen atoms connected to nitrogen and iodine atoms close to organic molecules in the 2D structure. This results in a change in charge distribution over the perovskite structure. Hence, the structural stability of the 2D structure was much better than the cubic structure of α-CsPbI3. Despite the more stability of quasi-2D perovskite, the presence of large organic molecules in this structure led to lower mechanical stability than its 3D counterpart, α-CsPbI3. In other words, this material has less tolerance for the pressure of time. According to the results, scintillation detectors based on 2D lead halide perovskites can be less efficient in harsh conditions than their 3D counterparts.
کلیدواژهها English