深圳大学学报理工版

采用X射线衍射仪、扫描电子显微镜、能量色散谱仪、分光光度计、荧光光谱仪和霍尔系数测试仪等,对单源真空热蒸发法直接制备的钙钛矿太阳电池吸收层HC(NH₂)₂PbI₃薄膜的晶化和微观结构以及表面形貌、化学元素计量比、光学和电学性能进行表征分析.结果表明,单源真空热蒸发法制备的HC(NH₂)₂PbI₃薄膜表面均匀、致密且平整,薄膜结晶度高,具有典型的钙钛矿晶体结构,薄膜的化学成分符合HC(NH₂)₂PbI₃薄膜的理想化学计量比,其禁带宽度为1.5 eV,满足钙钛矿太阳电池用薄膜的光学性能,将直接有利于钙钛矿太阳电池效率的提高.

The HC(NH₂)₂PbI₃ thin film as the perovskite solar cell absorption layer was prepared by single source thermal evaporation. The crystallization, microstructure, surface morphology, stoichiometric ratio, optical and electrical properties of the HC(NH₂)₂PbI₃ thin film were characterized by means of X-ray diffraction(XRD), X-ray energy dispersive spectroscope(EDS), scanning electron microscope(SEM), spectrophotometer, fluorescence spectrometer and Hall coefficient tester. The results show that uniform, compact, smooth HC(NH₂)₂PbI₃ thin film with good crystallization can be obtained by single source thermal evaporation. The chemical composition of the film is in accordance with the ideal stoichiometric ratio of HC(NH₂)₂PbI₃ thin film, and the direct bandgap of 1.50 eV for HC(NH₂)₂PbI₃ thin film can meet the requirement for the optical properties of thin film for perovskite solar cells. It will directly be beneficial to the efficiency of perovskite solar cells.

引言
1 实验
2 结果与讨论
3 结语

图1 HC(NH2)2PbI3粉末的XRD图谱<br/>Fig.1 XRD spectrogram of the HC(NH2)2PbI3 powder

图1 HC(NH2)2PbI3粉末的XRD图谱
Fig.1 XRD spectrogram of the HC(NH2)2PbI3 powder

图2 HC(NH2)2PbI3薄膜退火前后的XRD图谱<br/>Fig.2 XRD spectrograms of annealed and non-annealed HC(NH2)2PbI3 thin films

图2 HC(NH2)2PbI3薄膜退火前后的XRD图谱
Fig.2 XRD spectrograms of annealed and non-annealed HC(NH2)2PbI3 thin films

表1 HC(NH2)2PbI3样品在(110)和(220)峰位处的峰强、半高宽和晶粒尺寸<br/>Table 1 The peak intensity, FWHM and the grain size of HC(NH2)2PbI3 samples at(110)and (220)peak positions

表1 HC(NH2)2PbI3样品在(110)和(220)峰位处的峰强、半高宽和晶粒尺寸
Table 1 The peak intensity, FWHM and the grain size of HC(NH2)2PbI3 samples at(110)and (220)peak positions

图3 HC(NH2)2PbI3薄膜退火前后的SEM图<br/>Fig.3 SEM images of non-annealed and annealed HC(NH2)2PbI3 thin films

图3 HC(NH2)2PbI3薄膜退火前后的SEM图
Fig.3 SEM images of non-annealed and annealed HC(NH2)2PbI3 thin films

表2 HC(NH2)2PbI3粉末、薄膜和薄膜退火后的EDS数据<br/>Table 2 The EDS of the HC(NH2)2PbI3 powder, non-annealed and annealed thin films

表2 HC(NH2)2PbI3粉末、薄膜和薄膜退火后的EDS数据
Table 2 The EDS of the HC(NH2)2PbI3 powder, non-annealed and annealed thin films

图4 HC(NH2)2PbI3薄膜退火前后的Pb和I元素的分布图<br/>Fig.4 The distributions of Pb and I in non-annealed and annealed HC(NH2)2PbI3thin films

图4 HC(NH2)2PbI3薄膜退火前后的Pb和I元素的分布图
Fig.4 The distributions of Pb and I in non-annealed and annealed HC(NH2)2PbI3thin films

图5 HC(NH2)2PbI3薄膜退火前后的透射率图谱<br/>Fig.5 Transmittance spectra of non-annealed and annealed HC(NH2)2PbI3 thin films

图5 HC(NH2)2PbI3薄膜退火前后的透射率图谱
Fig.5 Transmittance spectra of non-annealed and annealed HC(NH2)2PbI3 thin films

图6 HC(NH2)2PbI3薄膜退火前后的光致发光图谱(PL)<br/>Fig.6 Photoluminescence response spectra of annealed and non-annealed HC(NH2)2PbI3 thin films

图6 HC(NH2)2PbI3薄膜退火前后的光致发光图谱(PL)
Fig.6 Photoluminescence response spectra of annealed and non-annealed HC(NH2)2PbI3 thin films

表3 HC(NH2)2PbI3薄膜退火前后的霍尔系数和载流子迁移率<br/>Table 3 Holzer coefficient and carrier mobility of non-annealed and annealed HC(NH2)2PbI3 thin films

表3 HC(NH2)2PbI3薄膜退火前后的霍尔系数和载流子迁移率
Table 3 Holzer coefficient and carrier mobility of non-annealed and annealed HC(NH2)2PbI3 thin films

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备注

引言

1 实验

2 结果与讨论

3 结语

期刊信息

备注

引言

1 实 验

2 结果与讨论

3 结 语

期刊信息

1 实验

3 结语