[We-A2-C] Optical and Quantum Phenomena in Semiconductor Nanostructures

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[We-A2-C-03] Unconventional Biexciton Dynamics in Superradiant Quantum Dots

Jose L Movilla¹, Chenglian Zhu^2,3, Petra Hoffman^2,3, Ihor Cherniukh^2,3, Leon G Feld^2,3, Maryna I Bodnarchuk^2,3, Simon C Boehme^2,3, Maksym Kovalenko^2,3, Josep Planelles¹, Gabriele Rainó^2,3, 〇Juan I. Climente¹ (1. Univ Jaume I (Spain), 2. ETH Zurich (Switzerland), 3. Empa Swiss Federal Lab (Switzerland))

We report a striking inversion in the biexciton/exciton radiative lifetime of CsPbBr₃ QDs with the dot size. For large QDs, the biexciton lifetime is longer than that of excitons, contrary to conventional knowledge for nanocrystals. The inversion is a consequence of exciton-exciton correlation.