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Efficient External Energy Transfer from Mn-Doped Perovskite Nanocrystals
Shiping Wang1,2, Jing Leng1, Qi Sun1,2
1State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
The Journal of Physical Chemistry Letters
|February 3, 2021
Summary
Manganese-doped perovskite nanocrystals efficiently transfer energy to rhodamine B molecules, enabling delayed emission. This process shows potential for photon energy conversion and biological imaging applications.
Area of Science:
- Materials Science
- Nanotechnology
- Photochemistry
Background:
- Transition metal doping tunes semiconductor nanocrystal (NC) optical properties.
- Host excitons transfer energy to dopants, increasing energy storage lifetime.
Purpose of the Study:
- To demonstrate efficient external energy transfer (EET) from Mn-doped CsPbCl3 perovskite NCs to rhodamine B (RhB).
- To investigate the relationship between RhB molecule coverage and EET efficiency.
Main Methods:
- Synthesis of Mn-doped CsPbCl3 perovskite NCs.
- Adsorption of rhodamine B molecules onto the NC surface.
- Measurement of delayed emission and calculation of EET rates.
Main Results:
- Efficient EET from Mn dopants to surface-adsorbed RhB was achieved.
- Delayed RhB emission was observed due to the EET process.
- EET rate increased with RhB coverage, reaching 1.42 ms-1 with 8.9 RhB molecules per NC.
- Energy extraction efficiency reached up to 71%.
Conclusions:
- Mn-doped perovskite NCs can serve as efficient donors for EET.
- The study highlights the potential of this system for photon energy conversion and biological imaging.
