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The influence of thickness on morphology and iodine decomposition in Copper(Ⅰ) Iodide film

机译：厚度对铜（Ⅰ）碘膜形态和碘分解的影响

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摘要

In the experiments of preparing Copper(I) Iodide films by iodination, it was found that the thickness affects the properties of the films. As the thickness of the films increased, the grain size increased, and the shape of the grains changed from regular hexagonal to triangular. In the atomic force microscope tests, the root mean square roughness of samples with different thicknesses varied considerably (from 58.6 nm to 101 nm with increasing thickness). The decomposition of iodine was studied indirectly by analyzing the relative intensity of the luminescence peaks of the different defects in the photoluminescence spectra. The decomposition of iodine leads to changes in the type and density of defect states in the films, which has a significant impact on the optoelectronic properties of the films. The resistance of the 440 nm copper(I) iodide prepared in the experiment increased from 0.078 Omega*cm to 0.165 Omega*cm after decomposition, and the intensity of the 710 nm defect emission increased by a factor of 20. The experimental results show that the iodine in thick samples decomposes more drastically. Decreasing the thickness of the films can attenuate the iodine decomposition, but obvious cracks and crystal gaps appear in samples with too small thickness. In-depth analysis of photoluminescence spectra and electrical resistance suggests that iodine decomposition may be directly related to surface roughness. By adjusting the film thickness, Copper(I) Iodide films with structural integrity, good stability and excellent photoelectric properties can be prepared. We hope that these findings will help researchers to synthesize Copper(I) Iodide films through iodination.
机译：在制备碘化铜（I）碘化碘化物的实验中，发现厚度影响薄膜的性质。随着薄膜的厚度增加，晶粒尺寸增加，并且晶粒的形状从常规六边形变为三角形。在原子力显微镜测试中，具有不同厚度的样品的均方根粗糙度大大变化（从58.6nm至101nm，厚度增加）。通过分析光致发光光谱中不同缺陷的发光峰的相对强度，间接地研究碘的分解。碘的分解导致薄膜中缺陷状态的类型和密度的变化，这对薄膜的光电性质产生了显着影响。在实验中制备的440nm铜（I）碘化物的电阻从0.078ωcm到0.165ωcm之间的分解后增加，710nm缺陷发射的强度增加了20倍。实验结果表明厚型样品中的碘可以急剧地分解。降低膜的厚度可以衰减碘分解，但是明显的裂缝和晶体间隙出现在具有太小厚度的样品中。深入分析光致发光光谱和电阻表明碘分解可以与表面粗糙度直接相关。通过调节膜厚，可以制备具有结构完整性，良好稳定性和优异光电性能的铜（I）碘化物膜。我们希望这些发现能够帮助研究人员通过碘化来合成铜（I）碘化物膜。

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  • 来源
    《Thin Solid Films》 |2021年第1期|138827.1-138827.9|共9页
  • 作者

    Zhang KeXin; Wang ShenWei; Zhang YanWei; Yi LiXin;

  • 作者单位

    Beijing Jiaotong Univ Inst Optoelect Technol Key Lab Luminescence & Opt Informat Minist Educ Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Inst Optoelect Technol Key Lab Luminescence & Opt Informat Minist Educ Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Inst Optoelect Technol Key Lab Luminescence & Opt Informat Minist Educ Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Inst Optoelect Technol Key Lab Luminescence & Opt Informat Minist Educ Beijing 100044 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Copper(I) Iodine film; Thickness; Iodine decomposition;

    机译：铜（I）碘膜;厚度;碘分解;

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