采用全真空单源热蒸发沉积技术直接制备钙钛矿太阳电池用有机无机杂化CH3NH3Pb I3薄膜。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能量色散谱仪(EDS)和分光光度计对制备的CH3NH3Pb I3薄膜微结构、表面形貌、化学成分和光学性能进行表征分析,并与非真空旋涂法制备的CH3NH3Pb I3薄膜性能进行比较。结果表明:单源热蒸发法制备的CH3NH3Pb I3薄膜呈现单一的钙钛矿四方晶体结构,且与蒸发源材料的晶体结构同源性高,没有出现杂质相偏析;对比旋涂法制备的CH3NH3Pb I3薄膜表面均匀致密平整,且薄膜结晶度更高;单源热蒸发法制备的CH3NH3Pb I3薄膜禁带宽度为1.57 e V,符合钙钛矿太阳电池吸收层光学性能要求。
【英文摘要】
Hybrid organolead halide CH3NH3 Pb I3 thin films were prepared by thermal evaporation with single source. The microstructure, composition, surface morphology and optical properties of the thin films were characterized by X-ray diffractometry(XRD), X-ray dispersive spectroscope(EDS), scanning electron microscope(SEM) and spectrophotometer technique, respectively. The comparison on properties for the films prepared by different methods(thermal evaporation and spin coating) was illustrated. Compared to the fil...
National Natural Science Foundation of China(61404086);Central Finance for the Development of Local Universi-ties(000022070150);Shenzhen Key Laboratory of Sensor Technology Open Project(SST201401)圳518060)全固态钙钛矿薄膜太阳电池的光电转化效率高,成本低,在
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