报告题目：Perovskite Nanoplatelets for Photonics and Future Applications in Quantum Computing

报 告 人：Robert L. Z. Hoye（牛津大学教授）

报告时间：2026年7月29日（星期三）下午14:00

报告地点：北区科技园1号楼501学术报告厅

主办单位：发光材料与器件全国重点实验室

报告人简介：

Metal-halide perovskites exhibit bright and sharp luminescence, with properties that can be tuned over a wide range through solution processing [1,2]. In this talk, I will discuss our realisation of linearly polarised luminescence from perovskite light-emitting diodes (LEDs) [3]. This is achieved by self-assembling CsPbI3 nanoplatelets into an edge-up orientation. Through strong dielectric and quantum confinement, there is large exciton fine structure splitting. As a result, we achieve strong emission from out-of-plane dipoles for the optically bright excitons in these superlattices. In light-emitting diodes, this leads to a high degree of polarisation (DOP) of 74.4% in electroluminescence [3]. We further work towards improving the stability and efficiency through compositional and ligand engineering [4-6].

Exciton fine structure splitting could also enable improved performance in perovskite single photon emitters, which are one of the building blocks of quantum computing. Recent work from Bawendi and co-workers showed that metal-halide perovskite nanocrystals have a sufficiently long optical coherence to outcompete dephasing [7]. This enables demonstrations of single photon emitters with high purity and brightness, but currently low indistinguishability ~50%. I will discuss our perspectives on the potential of making use of exciton fine structure splitting to enhance the indistinguishability.  

 [1] Ye, …, Hoye,* Chem. Soc. Rev., 53, 9085 (2024)

 [2] Ye, Mondal, …, Hoye,* Nat. Commun., 15, 8120 (2024)

 [3] Ye, …, Hoye,* Nature Photonics, 18, 586 (2024)

 [4] Jeong, …, Hoye,* Light: Science & Applications, 15, 22 (2026)

 [5] Kim, Jeong, Ye,* …, Hoye,* Advanced Materials (2026). DOI: 10.1002/adma.74023. arXiv: 2505.22817  

 [6] Lee, Bae, …, Hoye,* Matter, 9, 102760 (2026)

 [7] Bawendi, et al., Science, 363, 1068 (2019) 

报告摘要：

Robert Hoye is an Associate Professor of Materials Chemistry at the University of Oxford, where he is also a Fellow of St. John’s College and a Royal Academy of Engineering Senior Research Fellow. Prof. Hoye completed his PhD at the University of Cambridge (2012-2014), followed by a postdoc at MIT (2015-2016), before returning to the University of Cambridge as a College Research Fellow (2016-2019). In 2020, he moved to Imperial College London as a Lecturer, then Senior Lecturer (Aug. 2022 -). In Oct. 2022, he moved to Oxford as Associate Professor. Prof. Hoye’s group focuses on developing inorganic semiconductors for energy applications, including metal-halide perovskite nanocrystals, and discovery of lead-free perovskite-inspired materials. His group’s research spans from fundamentals (including spectroscopy and computations) to materials synthesis and applications in photovoltaics, light-emitting diodes and detectors. More information: hoyegroup.web.ox.ac.uk 

Prof. Hoye was awarded the 2026 EU-40 Prize from the E-MRS, and the 2024 RSC Beilby Medal and Prize from the RSC. He is CTO of NanoPrint Innovations Ltd., a company commercializing spatial atomic layer deposition.