Abstract

A single-stage centrifugation method is used for the precipitation and crystallization of a solution of a hybrid halide perovskite compound of the CH₃NH₃PbI₃ composition. The perovskite films are annealed in the temperature range of 80–140°C, during which the excess of the N-methylpyrrolidone solvent was removed by evaporation. The X-ray phase analysis of the synthesized perovskite layer is carried out. The morphology of the surface of the layers after crystallization and the transmission spectra in the optical range are studied. The experiments and research results showed that the optimal temperature regime for the formation and crystallization of lead triiodide methylammonium perovskite films is 100–110°C. The perovskite layers obtained in these processing regimes have a surface morphology with a uniform granular crystal structure and are highly uniform. Moreover, in solar cells based on perovskite-like CH₃NH₃PbI₃ structures with an annealing temperature of 100–110°C, the short-circuit currents reached 16.0 mA/cm². At the same time, at annealing temperatures of perovskite layers above 120°С, the maximum value of the short-circuit currents did not exceed 14.0 mA/cm².

中文翻译：

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CH3NH3PbI3组合物杂化卤化物钙钛矿溶液的结晶工艺研究与优化

摘要

采用单级离心方法来沉淀和结晶CH ₃ NH ₃ PbI ₃组合物的杂化卤化物钙钛矿化合物的溶液。钙钛矿薄膜在80-140°C的温度范围内退火，在此期间通过蒸发除去过量的N-甲基吡咯烷酮溶剂。对合成的钙钛矿层进行 X 射线物相分析。研究了结晶后层的表面形貌和光学范围内的透射光谱。实验和研究结果表明，三碘化铅甲基铵钙钛矿薄膜形成和结晶的最佳温度范围为100-110℃。在这些处理方式中获得的钙钛矿层具有具有均匀粒状晶体结构的表面形态并且高度均匀。此外，在基于类钙钛矿CH ₃ NH ₃ PbI ₃结构的太阳能电池中，退火温度为100-110℃时，短路电流达到16.0 mA/cm ²。同时，在钙钛矿层的退火温度高于120°С时，短路电流的最大值不超过14.0 mA/cm ²。