当前位置：
X-MOL 学术
›
Inorg. Chem.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Cesium Bismuth Iodide Solar Cells from Systematic Molar Ratio Variation of CsI and BiI3
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2019-09-04 00:00:00 , DOI: 10.1021/acs.inorgchem.9b01233 Malin B. Johansson 1 , Bertrand Philippe 2 , Amitava Banerjee 3 , Dibya Phuyal 2 , Soham Mukherjee 2 , Sudip Chakraborty 3 , Mathis Cameau 2 , Huimin Zhu 1 , Rajeev Ahuja 3, 4 , Gerrit Boschloo 1 , Håkan Rensmo 2 , Erik M. J. Johansson 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2019-09-04 00:00:00 , DOI: 10.1021/acs.inorgchem.9b01233 Malin B. Johansson 1 , Bertrand Philippe 2 , Amitava Banerjee 3 , Dibya Phuyal 2 , Soham Mukherjee 2 , Sudip Chakraborty 3 , Mathis Cameau 2 , Huimin Zhu 1 , Rajeev Ahuja 3, 4 , Gerrit Boschloo 1 , Håkan Rensmo 2 , Erik M. J. Johansson 1
Affiliation
|
Metal halide compounds with photovoltaic properties prepared from solution have received increased attention for utilization in solar cells. In this work, low-toxicity cesium bismuth iodides are synthesized from solution, and their photovoltaic and optical properties as well as electronic and crystal structures are investigated. The X-ray diffraction patterns reveal that a CsI/BiI3 precursor ratio of 1.5:1 can convert pure rhombohedral BiI3 to pure hexagonal Cs3Bi2I9, but any ratio intermediate of this stoichiometry and pure BiI3 yields a mixture containing the two crystalline phases Cs3Bi2I9 and BiI3, with their relative fraction depending on the CsI/BiI3 ratio. Solar cells from the series of compounds are characterized, showing the highest efficiency for the compounds with a mixture of the two structures. The energies of the valence band edge were estimated using hard and soft X-ray photoelectron spectroscopy for more bulk and surface electronic properties, respectively. On the basis of these measurements, together with UV–vis–near-IR spectrophotometry, measuring the band gap, and Kelvin probe measurements for estimating the work function, an approximate energy diagram has been compiled clarifying the relationship between the positions of the valence and conduction band edges and the Fermi level.
中文翻译：
CsI和BiI 3的系统摩尔比变化对碘化铯铋太阳能电池的影响
由溶液制备的具有光伏性质的金属卤化物在太阳能电池中的利用受到了越来越多的关注。在这项工作中，从溶液中合成了低毒性的碘化铯酸铋，并研究了它们的光电和光学特性以及电子和晶体结构。X射线衍射图谱表明，CsI / BiI 3前驱体比率为1.5：1可以将纯菱形BiI 3转换为纯六角形Cs 3 Bi 2 I 9，但是该化学计量比与纯BiI 3的任何中间比率都可以得到两个晶体相Cs 3 Bi 2 I 9和BiI3，其相对分数取决于CsI / BiI 3比率。表征了一系列化合物的太阳能电池，显示出具有两种结构的混合物的化合物的最高效率。分别使用硬X和软X射线光电子能谱估计价带边缘的能量，以得到更大的体积和表面电子性质。在这些测量的基础上，结合紫外可见分光光度法，测量带隙和开尔文探针测量以估计功函，已编制了一个近似能图，阐明了价态位置与原子位置之间的关系。导带边缘和费米能级。
更新日期：2019-09-04
中文翻译：
CsI和BiI 3的系统摩尔比变化对碘化铯铋太阳能电池的影响
由溶液制备的具有光伏性质的金属卤化物在太阳能电池中的利用受到了越来越多的关注。在这项工作中，从溶液中合成了低毒性的碘化铯酸铋，并研究了它们的光电和光学特性以及电子和晶体结构。X射线衍射图谱表明，CsI / BiI 3前驱体比率为1.5：1可以将纯菱形BiI 3转换为纯六角形Cs 3 Bi 2 I 9，但是该化学计量比与纯BiI 3的任何中间比率都可以得到两个晶体相Cs 3 Bi 2 I 9和BiI3，其相对分数取决于CsI / BiI 3比率。表征了一系列化合物的太阳能电池，显示出具有两种结构的混合物的化合物的最高效率。分别使用硬X和软X射线光电子能谱估计价带边缘的能量，以得到更大的体积和表面电子性质。在这些测量的基础上，结合紫外可见分光光度法，测量带隙和开尔文探针测量以估计功函，已编制了一个近似能图，阐明了价态位置与原子位置之间的关系。导带边缘和费米能级。
京公网安备 11010802027423号