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.

项目的目标是在各种化学成分，结构（单晶，3D，2D，0D）及其纳米晶体（量子点和纳米片）中获得有关电子状态和激子复合物的新基本知识。我们计划对激子的技术，实验和理论研究，它们的能量和自旋结构，重组动力学以及在激子 - 波利孔中与光耦合。我们还将通过测量G因子，自旋松弛和自旋相干时间以及识别自旋旋转相互作用的机制来关注载体（电子和孔），激子（中性和带电）和核自旋的相互作用自旋系统的自旋动力学。我们将搜索由钙钛矿的独特特性提供的已知现象的新的物理现象和新制度。所获得的知识将用于优化技术，光伏和发光设备的参数，以及测试钙钛矿对Spintronics应用的可行性。对于实验研究，涉及低温，高达60特斯拉的高磁场，极化分析，从200 fs到秒的较大时间范围以及高光谱分辨率的高磁场。项目目标涵盖了SPP呼叫的几个重点区域：（i）旋转效果/自旋轨道耦合； （ii）电荷载体动力学，重组和运输； （iii）维数（单晶，3D，2D，1D，0D）和组成调整的影响； （iv）铅的作用和可能的替代方案。