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- W2901078905 abstract "CdSe/PbSe Janus hetero-nanocrystals (HNCs) represent an interesting system where structurally immiscible CdSe and PbSe coexist in a single structure with intermixed electronic states. Here, we have investigated the carrier dynamics in Janus CdSe/PbSe HNCs through ultrafast transient absorption spectroscopy by selectively exciting either the CdSe or the PbSe domain. Upon excitation of the CdSe domain, ∼1 ps time-scale for hole transfer to the hybrid interfacial states was identified. On the other hand, the transfer of hot electron from PbSe to CdSe was evident upon creation of hot electrons in the PbSe domain without exciting the CdSe domain. The photoexcited hot hole also gets transferred to the hybrid interfacial states in ∼1 ps time, bleaching the corresponding transition. The decay of the localized hole was found to be much slower compared to that of the electron, which can be beneficial for carrier extraction and multiexciton generation. The finding of hot electron transfer in a single structure and slow decay of holes can thus prove to be advantageous for future design of photovoltaic devices." @default.
- W2901078905 created "2018-11-29" @default.
- W2901078905 creator A5008802551 @default.
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- W2901078905 creator A5067224203 @default.
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- W2901078905 date "2018-11-24" @default.
- W2901078905 modified "2023-09-24" @default.
- W2901078905 title "Disentangling the Electron and Hole Dynamics in Janus CdSe/PbSe Nanocrystals through Variable Pump Transient Absorption Spectroscopy" @default.
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- W2901078905 doi "https://doi.org/10.1021/acs.jpcc.8b11113" @default.
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