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Monodisperse Al-Doped ZnO/Perovskite Nanocapsule
Shih-Shou Lo1, Yi-Ting Yang1, Mu-Ting Li1
1Department of Photonics , Feng-Chia University , No. 100, Whenhwa Rd. , Seatwean Area, Taichung 40724 , Taiwan , Republic of China.
ACS Applied Materials & Interfaces
|December 21, 2019
Summary
We created sealed zinc oxide (ZnO) nanocapsules containing methylammonium lead bromide (CH3NH3PbBr3) perovskite. These nanocapsules enhance photocurrent and stability, showing promise for optoelectronics and drug delivery.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Developing stable perovskite materials is crucial for optoelectronic applications.
- Encapsulation strategies are needed to protect sensitive perovskite structures from degradation.
Purpose of the Study:
- To develop monodisperse ZnO nanocapsules for encapsulating methylammonium lead bromide (CH3NH3PbBr3).
- To investigate the optoelectronic properties and stability of Al-doped ZnO (AZO)/CH3NH3PbBr3 nanocapsules.
Main Methods:
- Fabrication of monodisperse ZnO nanocapsules using atmospheric N plasma.
- Doping ZnO nanorods with Aluminum (Al) to enhance conductivity.
- Encapsulation of CH3NH3PbBr3 within ZnO nanocapsules.
- Photoelectrochemical testing using a three-electrode cell under AM 1.5 illumination.
Main Results:
- Observed a green emission peak at 535 nm due to CH3NH3PbBr3 free-exciton recombination.
- AZO/CH3NH3PbBr3 nanocapsule arrays exhibited a 1.5-fold increase in photocurrent (0.2 mA/cm2 at 1 V vs. Ag/AgCl) compared to AZO nanorod arrays.
- Demonstrated enhanced photo-current stability under repeated on/off light conditions, indicating successful sealing and reduced CH3NH3PbBr3 degradation.
Conclusions:
- Successfully developed sealed AZO/CH3NH3PbBr3 nanocapsules with significantly improved optoelectronic performance and stability.
- The encapsulation effectively mitigates perovskite degradation, preserving its properties.
- This novel platform offers potential for advanced nanoscale optical, optoelectronic devices, and drug delivery systems.
