Control over ultrafast Rashba splitting dynamics in quasi-2D arrays of 3D hybrid perovskite nanocrystals by the interfacial electric field

ORAL

Abstract

Snapshot spectral imaging has been performed with 100 fs steps in delay-times for fully encapsulated quasi-2D arrays of 3D hybrid perovskite MAPbBr3 nanocrystals (~20 nm in size) spin-coated to either the clean sapphire plate or to that initially ALD-coated by a ~30 or ~100 nm thick ZnO layer. The absorption bleaching band for the bare MAPbBr3 nanocrystal arrays reveals a ~200 meV splitting appearing within ~1 ns, which has been assigned to the Rashba splitting effect. However, the splitting unexpectedly disappears for the MAPbBr3/ZnO samples at delay-times longer than ~500-600 fs when the interfacial electric field at the MAPbBr3/ZnO heterointerface develops due to charge separation. The effect has been treated theoretically in the frame of the model taking into account the interfacial-field-induced structural phase transition in MAPbBr3 nanocrystals.

–

Presenters

  • Yuri Glinka

    • Department of Electrical and Electronic Engineering, Guangdong University Key Lab for Advanced Quantum Dot Displays and Lighting, Shenzhen Key Laboratory for Advanced Quantum

Authors

  • Yuri Glinka

    • Department of Electrical and Electronic Engineering, Guangdong University Key Lab for Advanced Quantum Dot Displays and Lighting, Shenzhen Key Laboratory for Advanced Quantum

  • Rui Cai

    • Department of Electrical and Electronic Engineering, Guangdong University Key Lab for Advanced Quantum Dot Displays and Lighting, Shenzhen Key Laboratory for Advanced Quantum

  • Junzi Li

    • College of Physics and Energy, Shenzhen University, Shenzhen 518060, China

  • Xiaodong Lin

    • College of Physics and Energy, Shenzhen University, Shenzhen 518060, China

  • Tingchao He

    • College of Physics and Energy, Shenzhen University, Shenzhen 518060, China

  • Rui Chen

    • Department of Electrical and Electronic Engineering, Guangdong University Key Lab for Advanced Quantum Dot Displays and Lighting, Shenzhen Key Laboratory for Advanced Quantum

  • Xiao Wei Sun

    • Department of Electrical & Electronic Engineering, Guangdong University Key Lab for Advanced Quantum Dot Displays and Lighting, Shenzhen Key Laboratory for Advanced Quantum D