Spin and recombination dynamics of excitons and carries in metal halide perovskites

金属卤化物钙钛矿中激子和载流子的自旋和复合动力学

• 批准号: 424153319
• 负责人: Professor Dr. Dmitri Yakovlev, Ph.D.
• 金额: --
• 依托单位: Laboratory of Inorganic Chemistry
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/424153319?language=en
• 关键词: Spin; recombination; dynamics; excitons; carries

The project goal is to receive new basic knowledge on the electronic states and exciton complexes in metal halide perovskites of various chemical compositions, structures (single crystals, 3D, 2D, 0D) and in their nanocrystals (quantum dots and nanoplatelets). We plan technological, experimental and theoretical study of excitons, their energy and spin structure, recombination dynamics and coupling with light in exciton-polaritons. We will also focus on spin-dependent phenomena and spin dynamics of interacting spin systems of carriers (electrons and holes), excitons (neutral and charged) and nuclei spins, by measuring g-factors, spin relaxation and spin coherence times and identifying mechanisms of spin-spin interactions. We will search for new physical phenomena and new regimes of the known phenomena provided by the unique properties of the perovskites. The gained knowledge will be used for optimizing technology, parameters of photovoltaic and light-emitting devices and for testing the feasibility of the perovskites for spintronics applications. For experimental studies optical techniques, involving low temperatures, high magnetic fields up to 60 Tesla, polarization analysis, time-resolution in wide temporal range from 200 fs to seconds and high spectral resolution will be used. The project goals cover several focus areas of the SPP call: (i) spin effects/spin-orbit coupling; (ii) charge carrier dynamics, recombination, and transport; (iii) effects of dimensionality (single crystals, 3D, 2D, 1D, 0D) and composition tuning; and (iv) role of lead and possible alternatives.

该项目的目标是获得关于各种化学成分，结构（单晶，3D，2D，0 D）及其纳米晶体（量子点和纳米片）的金属卤化物钙钛矿中的电子态和激子复合物的新基础知识。我们计划对激子，激子的能量和自旋结构，激子-极化激元的复合动力学和与光的耦合进行技术，实验和理论研究。我们还将通过测量g因子，自旋弛豫和自旋相干时间以及确定自旋-自旋相互作用的机制，专注于载流子（电子和空穴），激子（中性和带电）和核自旋相互作用自旋系统的自旋相关现象和自旋动力学。我们将寻找新的物理现象和钙钛矿的独特性质所提供的已知现象的新机制。所获得的知识将用于优化光伏和发光器件的技术和参数，并用于测试钙钛矿用于自旋电子学应用的可行性。对于实验研究，将使用光学技术，包括低温、高达60特斯拉的高磁场、偏振分析、从200 fs到秒的宽时间范围内的时间分辨率和高光谱分辨率。该项目的目标涵盖SPP呼叫的几个重点领域：（i）自旋效应/自旋轨道耦合;（ii）电荷载流子动力学，复合和传输;（iii）维度（单晶，3D，2D，1D，0 D）和成分调整的影响;以及（iv）铅的作用和可能的替代品。