CH_(3)NH_(3)PbI_(3)多晶薄片的制备及性能表征  

Preparation and characterization of CH_(3)NH_(3)PbI_(3) polycrystalline flakes

作　　者：田宁[1] 屈艳梅 于吉 黄永涛 罗寅先 谭雯竹 郑杰 TIAN Ning;QU Yanmei;YU Ji;HUANG Yongtao;LUO Yinxian;TAN Wenzhu;ZHENG Jie(College of Physical Science and Technology,Shenyang Normal University,Shenyang 110034,China)

机构地区：[1]沈阳师范大学物理科学与技术学院,沈阳110034

出　　处：《沈阳师范大学学报（自然科学版）》2022年第6期487-490,共4页Journal of Shenyang Normal University:Natural Science Edition

基　　金：辽宁省科技厅自然科学基金资助项目(2019JH3/30100036)。

摘　　要：近几年,有机-无机杂化钙钛矿以低暗电流、高载流子迁移率、较长的载流子寿命等优异的光电性能引起人们的广泛关注。目前报道的高性能射线探测器件大部分为面积较小、形状不可控、生长环境严苛的晶体材料,为此,发展大面积且厚度可控的制备技术成为目前需要解决的问题。首先,通过反向升温法制备了CH_(3)NH_(3)PbI_(3)单晶,筛选出生长面积小且不规则的单晶废料;然后,将CH_(3)NH_(3)PbI_(3)单晶废料放入研钵中进行充分的研磨;最后,将粉末放入模具中进行热压,制备出致密性高、厚度可控的大面积CH_(3)NH_(3)PbI_(3)多晶薄片,并对CH_(3)NH_(3)PbI_(3)多晶薄片进行表面微观形貌、物相结构、结晶度、电化学、吸收透射表征。结果表明,通过热压法制备的CH_(3)NH_(3)PbI_(3)多晶薄片致密性良好、纯度高,具有良好的结晶性。In recent years, organic-inorganic hybrid perovskites have attracted extensive attention due to their excellent optoelectronic properties such as low dark current, high carrier mobility, and long carrier lifetime. Most of the high-performance ray detection devices reported so far are crystal materials with small area, uncontrollable shape, and harsh growth environment. For this reason, the development of large-area and thickness-controllable fabrication technology has become a problem that needs to be solved in current research. In this paper, the CH_(3)NH_(3)PbI_(3)single crystal was first prepared by the reverse heating method, and the single crystal waste with small and irregular growth area was screened out. Then the CH_(3)NH_(3)PbI_(3)single crystal waste was put into a mortar for sufficient grinding, and then the powder was put into the mold for hot pressing. Large-area CH_(3)NH_(3)PbI_(3)polycrystalline flakes with high density and controllable thickness were prepared by hot pressing. The surface morphology, phase structure, crystallinity, electrochemistry, absorption and transmission of CH_(3)NH_(3)PbI_(3)polycrystalline flakes were characterized. The results show that the CH_(3)NH_(3)PbI_(3)polycrystalline flakes prepared by hot pressing have good compactness, high purity and good crystallinity.

关 键 词：甲胺碘化铅 多晶薄片 钙钛矿 热压法 

分 类 号：TN36[电子电信—物理电子学]