Related Experiment Video
Updated: Jul 20, 2025
09:11
Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications
Published on: March 22, 2020
7.9K
Electron Transfer Dynamics from CsPbBr3 Nanocrystals to Au144 Clusters.
Kritiman Marjit1, Goutam Ghosh1, Srijon Ghosh1
1School of Materials Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
ACS Physical Chemistry Au
|July 31, 2023
Summary
Hot carrier dynamics in CsPbBr3-Au144 hybrids show faster cooling and hot electron transfer from perovskite to gold. This enhances charge separation, boosting optoelectronic device performance.
Area of Science:
- Materials Science
- Nanotechnology
- Photovoltaics
Background:
- Lead halide perovskite nanocrystals are promising for optoelectronics.
- Understanding hot carrier (HC) dynamics is crucial for solar cell efficiency.
Purpose of the Study:
- Investigate electron transfer dynamics in CsPbBr3-Au144 cluster hybrids.
- Analyze hot carrier cooling and transfer mechanisms.
Main Methods:
- Ultrafast transient absorption spectroscopy.
- Fabrication of CsPbBr3-Au144 hybrid systems.
Main Results:
- Faster HC cooling time (334 fs) and reduced HC temperature (860 K) observed.
- Significant hot electron transfer efficiency (45%) achieved above band-edge.
- Enhanced photocurrent to dark current ratio confirms charge separation.
Conclusions:
- Hot electron transfer from CsPbBr3 to Au144 NCs is efficient.
- This process improves charge separation in hybrid optoelectronic devices.
- Findings offer insights for designing high-performance solar cells.
