Charge Carrier Relaxation in Colloidal FAPbI3 Nanostructures Using Global Analysis
Abstract
:1. Introduction
2. Materials and Methods
2.1. Material Synthesis and Characterization
2.2. Steady-State Spectroscopy
2.3. Time-Resolved Spectroscopy
2.4. Data Analysis
2.4.1. Conventional Method: Tail-Fitting
2.4.2. Global Analysis
3. Results
3.1. Sample Characterization
3.2. Carrier Relaxation Dynamics
4. Discussion
4.1. Limitations of the High-Energy Tail Fitting Method
4.2. Global Analysis Versus High-Energy Tail Fitting over Short Times
4.3. On the Hot Carrier Relaxation Mechanisms
4.4. LO-Phonon Scattering as the First Relaxation Stage
4.5. Auger Recombination Further Slows Down the Relaxation in a Longer Time Range
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Appendix A
References
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Excitation Fluence (µJ/cm2) | A1 (%) | τ1 (ps) | A2 (%) | τ2 (ps) | A3 (%) | τ3 (ps) | T0 (K) |
---|---|---|---|---|---|---|---|
6 | 90 ± 30 | 0.25 ± 0.05 | 5.7 ± 0.5 | 11 ± 2 | 5 ± 2 | 1030 ± 860 | 540 ± 60 |
60 | 70 ± 4 | 2.1 ± 0.6 | 30 ± 4 | 14 ± 2 | - | - | 588 ± 8 |
Excitation Fluence (µJ/cm2) | Ti (K) | Tf (K) | τ1 (ps) |
---|---|---|---|
6 | 1648 ± 71 | 731 ± 6 | 0.36 ± 0.02 |
15 | 1919 ± 82 | 937 ± 8 | 0.44 ± 0.02 |
30 | 2931 ± 25 | 1399 ± 15 | 0.62 ± 0.02 |
60 | 3920 ± 30 | 1770 ± 22 | 0.97 ± 0.08 |
Excitation Fluence (µJ/cm2) | τ1,m = 1/k1,m (ps) | τ2,m = 1/k2,m (ps) | τ3,m = 1/k3,m (ps) | τ1,l = 1/k1,l (ps) | τ2,l = 1/k2,l (ps) | τ3,l = 1/k3,l (ns) |
---|---|---|---|---|---|---|
6 | 0.3 ± 1 | 42.9 ± 0.3 | 510 ± 10 | 82 ± 1 | 600 ± 10 | [>3 ns] |
15 | 5 ± 1 | 34.5 ± 0.2 | 400 ± 10 | 63.0 ± 0.6 | 520 ± 10 | [>3 ns] |
30 | 4 ± 1 | 29.4 ± 0.1 | 320 ± 10 | 58.8 ± 0.3 | 640 ± 10 | [>3 ns] |
60 | 4 ± 1 | 25.1 ± 0.1 | 280 ± 10 | 58.9 ± 0.4 | 810 ± 10 | [>3 ns] |
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Franco, C.V.; Mahler, B.; Cornaggia, C.; Gustavsson, T.; Cassette, E. Charge Carrier Relaxation in Colloidal FAPbI3 Nanostructures Using Global Analysis. Nanomaterials 2020, 10, 1897. https://doi.org/10.3390/nano10101897
Franco CV, Mahler B, Cornaggia C, Gustavsson T, Cassette E. Charge Carrier Relaxation in Colloidal FAPbI3 Nanostructures Using Global Analysis. Nanomaterials. 2020; 10(10):1897. https://doi.org/10.3390/nano10101897
Chicago/Turabian StyleFranco, Carolina Villamil, Benoît Mahler, Christian Cornaggia, Thomas Gustavsson, and Elsa Cassette. 2020. "Charge Carrier Relaxation in Colloidal FAPbI3 Nanostructures Using Global Analysis" Nanomaterials 10, no. 10: 1897. https://doi.org/10.3390/nano10101897