Temperature-Dependent Phase Stable Hybrid Halide Perovskite Films by Chemical Vapor Deposition
Temperature-Dependent Phase Stable Hybrid Halide Perovskite Films by Chemical Vapor Deposition
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DOI：
10.1021/acsaelm.2c00449
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发表时间：
2022-07
影响因子：
4.7
通讯作者：
Randy Burns;S. Ngqoloda;Stephen C. Klue;E. Karapetrova;C. Arendse;S. Guha
中科院分区：
文献类型：
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作者：
Randy Burns;S. Ngqoloda;Stephen C. Klue;E. Karapetrova;C. Arendse;S. Guha
采用化学气相沉积法制备了碘化甲基铵铅（MAPbI 3-xClx）薄膜。温度依赖的掠入射同步辐射X射线衍射测量证实，MAPbI 3-xClx的结构，其中Cl的行为更像一个掺杂剂，保持在整个的四方相在20-300 K的温度范围内。这些研究进一步与温度相关的光致发光（PL）的研究。PL峰能量随温度单调增加，表明单相行为。作为温度的函数进行的电阻测量显示没有拐点，这表明其相位的均匀性。在200至325 K之间，电阻保持恒定。
Methylammonium lead iodide (MAPbI3–xClx) thin films were synthesized using chemical vapor deposition. Temperature-dependent grazing incidence synchrotron-based X-ray diffraction measurements confirm that the structure of MAPbI3–xClx, where Cl acts more like a dopant, remains throughout in the tetragonal phase in the temperature range of 20–300 K. These studies are further correlated with temperature-dependent photoluminescence (PL) studies. The PL peak energy monotonically increases with temperature, suggestive of a single-phase behavior. Resistance measurements conducted as a function of temperature show an absence of inflection points, suggesting uniformity in its phase. Between 200 and 325 K, the resistance remains a constant.