钙钛矿纳米片超晶格的直接线偏振电致发光
Direct Linearly-Polarised Electroluminescence from Perovskite Nanoplatelet Superlattices
AI总结：
本研究利用CsPbI3钙钛矿纳米片超晶格制备LED，通过溶剂控制纳米片自组装取向与跃迁偶极矩，在无光子结构下实现74.4%高线性偏振度的纯红光直接发射，为下一代3D显示和光通信提供新途径。
摘要：
偏振光对广泛应用至关重要，但通常通过滤除非偏振光产生，这会导致显著的能量损失并需要额外的光学器件。在此，由CsPbI3钙钛矿纳米片超晶格制成的发光二极管（LED）实现了线偏振光的直接发射。通过使用不同蒸汽压的溶剂，实现了钙钛矿纳米片的自组装，从而能够精细控制其取向（平躺或竖立），进而控制跃迁偶极矩。由于纳米片的高度均匀排列及其强烈的量子和介电限制，在薄膜层面实现了大的激子精细结构分裂，使得纯红光LED在没有任何光子结构的情况下表现出74.4%的高线性偏振度。这项工作揭示了钙钛矿纳米片作为极具前景的线偏振电致发光源的可能性，开启了从这种高度通用、可溶液加工的系统开发下一代3D显示和光通信的进程。
英文摘要：
Polarised light is critical for a wide range of applications, but is usually generated by filtering unpolarised light, which leads to significant energy losses and requires additional optics. Herein, the direct emission of linearly-polarised light is achieved from light-emitting diodes (LEDs) made of CsPbI3 perovskite nanoplatelet superlattices. Through use of solvents with different vapour pressures, the self-assembly of perovskite nanoplatelets is achieved to enable fine control over the orientation (either face-up or edge-up) and therefore the transition dipole moment. As a result of the highly-uniform alignment of the nanoplatelets, as well as their strong quantum and dielectric confinement, large exciton fine-structure splitting is achieved at the film level, leading to pure-red LEDs exhibiting a high degree of linear polarisation of 74.4% without any photonic structures. This work unveils the possibilities of perovskite nanoplatelets as a highly promising source of linearly-polarised electroluminescence, opening up the development of next-generation 3D displays and optical communications from this highly versatile, solution-processable system.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
