期刊
NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/s41467-020-19740-7
关键词
-
资金
- French National Agency for Research
- Idex Bordeaux (LAPHIA Program)
- EUR Light ST
- Institut universitaire de France
- EU via Horizon 2020 [EMPAPOSTDOCS-II program under Marie Sklodowska-Curie grant [754364]
- EU via Horizon 2020 [ERC Consolidator Grant SCALE-HALO] [819740]
- Region Aquitaine
- European Research Council (ERC) [819740] Funding Source: European Research Council (ERC)
- Marie Curie Actions (MSCA) [754364] Funding Source: Marie Curie Actions (MSCA)
Cesium lead halide perovskites exhibit outstanding optical and electronic properties for a wide range of applications in optoelectronics and for light-emitting devices. Yet, the physics of the band-edge exciton, whose recombination is at the origin of the photoluminescence, is not elucidated. Here, we unveil the exciton fine structure of individual cesium lead iodide perovskite nanocrystals and demonstrate that it is governed by the electron-hole exchange interaction and nanocrystal shape anisotropy. The lowest-energy exciton state is a long-lived dark singlet state, which promotes the creation of biexcitons at low temperatures and thus correlated photon pairs. These bright quantum emitters in the near-infrared have a photon statistics that can readily be tuned from bunching to antibunching, using magnetic or thermal coupling between dark and bright exciton sublevels. The optical and electronic properties of cesium lead halide perovskite nanocrystals are dictated by the band-edge exciton, whose physics is not elucidated. Here, the authors unveil its fine structure and demonstrate that the ground dark singlet state promotes the creation of biexcitons at low temperatures and thus correlated photon pairs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据