García-Aboal Rocío, Fenollosa Roberto, Ramiro-Manzano Fernando, Rodríguez Isabelle, Meseguer Francisco, Atienzar Pedro
Instituto Universitario de Tecnologia Química, CSIC-UPV, Universitat Politècnica de València, Av. de los Naranjos, Valencia 46022, Spain.
ACS Omega. 2018 May 15;3(5):5229-5236. doi: 10.1021/acsomega.8b00447. eCollection 2018 May 31.
Synthesis and studies of single crystals of hybrid perovskite are important for achieving a better understanding of the optoelectronic phenomena occurring in this material and for improving ongoing applications. Here, we report on the growth of micrometer-size single crystals of methylammonium lead bromide (MAPbBr) using the spin coating deposition method on a quartz substrate. We studied the influence of the rotation speed and the use of three different additives -cyclohexyl-2-pyrrolidone, dimethyl sulfoxide, and 4--butylpyridine on the crystal size and shape. The introduction of an additive in the precursor solution is revealed to be very useful for obtaining crystals with well-defined geometries and for decreasing the amount of defects. In this way, high-quality single crystals that sustain optical resonating modes were obtained and characterized by transmittance and photoluminescence measurements.
混合钙钛矿单晶的合成与研究对于更好地理解该材料中发生的光电现象以及改进现有应用至关重要。在此，我们报告了使用旋涂沉积法在石英衬底上生长微米级甲基溴化铅（MAPbBr）单晶的情况。我们研究了转速以及三种不同添加剂——环己基-2-吡咯烷酮、二甲基亚砜和4-丁基吡啶的使用对晶体尺寸和形状的影响。结果表明，在前驱体溶液中引入添加剂对于获得具有明确几何形状的晶体以及减少缺陷数量非常有用。通过这种方式，获得了能够维持光学共振模式的高质量单晶，并通过透射率和光致发光测量对其进行了表征。
