[10p-N303-1~19] 13.8 Optical properties and light-emitting devices

△ [10p-N303-15] Investigation of the Quenching Mechanism of CsPbBr₃ Nanocrystal/Diarylethene Hybrids Using Femtosecond Pump-Probe Spectroscopy

〇Yuji Akaishi¹, Ashkan Mokhtar¹, Taiki Nohara¹, Daisuke Kosumi¹, Tuyoshi Fukaminato¹, Tetsuya Kida¹ (1.Kumamoto Univ.)

Keywords:Perovskite Nanocrystal, Diarylethene, Transient Absorption Spectroscopy

In recent years, CsPbX₃ (X=Cl, Br, I, or their mixture) nanocrystals have attracted much attention as a new luminescent material due to their sharp photoluminescence (PL) emission and high PL quantum efficiencies. Recently, we have found that the PL intensity of CsPbBr₃ nanocrystals can be switched On and Off photo-reversibly by mixing them with photochromic diarylethene. In this study, we studied the kinetics of the PL photoswitching behavior of CsPbBr₃ nanocrystals coupled with various diarylethene derivatives by the femtosecond transient absorption spectroscopy.