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Investigation of Dimethylammonium Solubility in MAPbBr3 Hybrid Perovskite: Synthesis, Crystal Structure, and Optical Properties
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2018-12-14 00:00:00 , DOI: 10.1021/acs.inorgchem.8b03072
Camilla Anelli 1 , Michele R. Chierotti 2 , Simone Bordignon 2 , Paolo Quadrelli 1 , Daniela Marongiu 3 , Giovanni Bongiovanni 3 , Lorenzo Malavasi 1
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The possible existence of mixed methylammonium (MA)/dimethylammonium (DMA) lead bromide hybrid perovskites of general formula MA1–xDMAxPbBr3 (0 ≤ x ≤ 1) was investigated. A combined X-ray diffraction and solid-state nuclear magnetic resonance approach indicates that DMA can be incorporated up to about x = 0.30 while retaining the cubic lattice of MAPbBr3. By increasing the DMA content (x), the absorption shows a progressive blue shift and the band gap moves from about 2.17 eV (x = 0) to about 2.23 (x = 0.30) with a concomitant slightly faster recombination in the mixed cation powders.

中文翻译:

二甲基铵在MAPbBr 3杂化钙钛矿中的溶解度研究:合成,晶体结构和光学性质

混合甲基铵(MA)/二甲基铵(DMA)通式MA的溴化铅混合钙钛矿可能存在的1- X DMA X PbBr 3(0≤ X ≤1)进行了调查。X射线衍射和固态核磁共振相结合的方法表明,在保留MAPbBr 3的立方晶格的同时,DMA的掺入量最高可达x = 0.30 。通过增加DMA含量(x),吸收显示出渐进的蓝移,并且带隙从约2.17 eV(x = 0)移至约2.23(x = 0.30),同时在混合阳离子粉末中的复合速度稍快。
更新日期:2018-12-14
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