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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Surface morphological, optical and electrical characterization of methylammonium lead bromide perovskite (CH3NH3PbBr3) thin film
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Surface morphological, optical and electrical characterization of methylammonium lead bromide perovskite (CH3NH3PbBr3) thin film

机译：表面形态，光学和电学表征甲基甲基溴化溴铵钙钛矿（CH3NH3PBBR3）薄膜

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摘要

Hybrid halide perovskites (CH3NH3PbX3; X=F, Cl, Br and I) have been emerging as innovative candidates in the development of optoelectronic devices. In this paper, a methylammonium lead bromide (CH3NH3PbBr3) perovskite-based heterojunction device of architecture FTO/PEDOT:PSS/CH3NH3PbBr3/PC61BM/Al has been fabricated using a low-cost spin casting method. PEDOT:PSS and PC61BM layers serve as the hole transport layer (HTL) and the electron transport layer (ETL), respectively. The photoluminescence and absorbance spectrum of perovskite have been determined with an extracted band gap using a Tauc plot. The electrical characterization of the device has been carried out using current-voltage and impedance measurements. A dark current measurement reveals low leakage current, which can be attributed to the blocking effect of the PEDOT:PSS and PC61BM layers. The photocurrent generation in the device has been explained by the energy level diagram, and the role of the ETL and HTL identified. The device exhibits the ideality factor 2.37 in the dark and 1.79 under illumination. The parameters show good correlation with the I-V results.
机译：杂交卤化物蠕动（CH3NH3PBX3; X = F，CL，BR和I）一直是在光电器件开发中的创新候选者。本文中，甲基丙铵（CH3NH3PBBBBBR3）施工基于架构的钙钛矿的异质结装置FTO / PEDOT：PSS / CH3NH3PBBBR3 / PC61BM / AL采用低成本旋铸法制造。 PEDOT：PSS和PC61BM层分别用作空穴传输层（HTL）和电子传输层（ETL）。使用Tauc图，用提取的带隙确定了钙钛矿的光致发光和吸光度谱。已经使用电流 - 电压和阻抗测量来执行设备的电学表征。暗电流测量显示出低漏电流，这可能归因于PEDOT的阻塞效果：PSS和PC61BM层。通过能级图解释了装置中的光电流产生，以及鉴定的ETL和HTL的作用。该装置在照明中展示了黑暗中的理想因子2.37和1.79。该参数与I-V结果显示出良好的相关性。

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