论文部分内容阅读
有机无机杂化钙钛矿因其优异的光电性能受到广泛关注,但是其对湿度、热的不稳定性会限制钙钛矿电池的进一步发展.本文通过简单的溶液浸泡法在导电基底上制备了尺寸为50-100nm的全无机碘化铅铯纳米线,并通过离子交换法将碘化铅铯置换成溴化铅铯纳米线.文章通过X射线衍射谱、紫外可见吸收光谱、荧光发光光谱对I离子交换成Br离子过程进行了研究.结果发现I-Br离子交换过程中伴随着晶体结构的变化,起初的碘化铅铯为非钙钛矿结构,离子交换后制备的溴化铅铯为钙钛矿结构.本文将全无机卤化铅铯纳米线应用在钙钛矿电池器件中,器件显示出优越的稳定性,放置5500小时效率几乎未衰减.
Organic-inorganic hybrid perovskites have attracted much attention because of their excellent optoelectronic properties, but their instability to humidity and heat will limit the further development of perovskite cells.In this paper, a simple solution immersion method was used to prepare Size inorganic lead iodide cesium nanowires with a size of 50-100nm and lead-cesium iodide replaced by lead bromide cesium nanowires by ion exchange method.The article uses X-ray diffraction spectrum, UV-visible absorption spectrum and fluorescence spectrum I ion exchange process into Br ions was studied.The results show that I-Br ion exchange process accompanied by changes in crystal structure, the initial lead-cesium iodide non-perovskite structure, ion exchange prepared lead bromide lead Perovskite structure.In this paper, all inorganic lead halide cesium nanowires used in perovskite battery device, the device showed superior stability, leaving 5500 hours of almost non-decay efficiency.