Study of Hot Carriers in Solar Cells with BABr-Added MAPbBr3
Author Information
Author(s): Zhang Yi, Chen Huilong, Qu Junfeng, Zhang Jiayu, Conibeer Gavin, Stathatos Elias
Primary Institution: College of Renewable Energy, Hohai University, Changzhou, China
Hypothesis
The addition of BABr to MAPbBr3 quantum dots will improve the thermalization mechanisms in hot carrier multi-junction solar cells.
Conclusion
Adding BABr to MAPbBr3 quantum dots decreases the thermalization coefficient, indicating a slower relaxation rate and improved efficiency potential for solar cells.
Supporting Evidence
- Adding BABr improved the fluorescence intensity and extended the carrier lifetime.
- The thermalization coefficient Qth decreased from 2.64 ± 0.29 to 2.36 ± 0.25 mW·K−1·cm−2 after adding BABr.
- BABr passivates surface defects, which slows down the carrier thermalization process.
Takeaway
This study shows that adding a substance called BABr to a special type of solar cell material helps it work better by slowing down how quickly energy is lost.
Methodology
The study used power-dependent steady-state photoluminescence (PD-SSPL) to measure the thermalization coefficient of MAPbBr3 quantum dots with and without BABr.
Limitations
The study does not explore the long-term stability of the modified quantum dots under operational conditions.
Digital Object Identifier (DOI)
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