التفاصيل البيبلوغرافية
| العنوان: |
Temperature-Dependent Interplay between Structural and Charge Carrier Dynamics in CsMAFA-Based Perovskites |
| المؤلفون: |
Zhao, J., Liu, X., Wu, Zijin, Ibrahim, B., Thieme, J., Brocks, Geert, Tao, Shuxia, Bannenberg, L.J., Savenije, T.J. |
| سنة النشر: |
2023 |
| مصطلحات موضوعية: |
charge carrier dynamics, metal halide perovskites, microstrain, phase structure, shallow trap states, time-resolved microwave conductivity, geo, socio |
| الوصف: |
State-of-the-art triple cation, mixed halide perovskites are extensively studied in perovskite solar cells, showing very promising performance and stability. However, an in-depth fundamental understanding of how the phase behavior in Cs 0.05 FA 0.85 MA 0.10 Pb(I 0.97 Br 0.03 ) 3 (CsMAFA) affects the optoelectronic properties is still lacking. The refined unit cell parameters a and c in combination with the thermal expansion coefficients derived from X-ray diffraction patterns reveal that CsMAFA undergoes an α–β phase transition at ≈280 K and another transition to the γ-phase at ≈180 K. From the analyses of the electrodeless microwave photoconductivity measurements it is shown that shallow traps only in the γ-phase negatively affect the charge carrier dynamics. Most importantly, CsMAFA exhibits the lowest amount of microstrain in the β-phase at around 240 K, corresponding to the lowest amount of trap density, which translates into the longest charge carrier diffusion length for electrons and holes. Below 200 K a considerable increase in deep trap states is found most likely related to the temperature-induced compressive microstrain leading to a huge imbalance in charge carrier diffusion lengths between electrons and holes. This work provides valuable insight into how temperature-dependent changes in structure affect the charge carrier dynamics in FA-rich perovskites. ; ChemE/Opto-electronic Materials ; ChemE/O&O groep ; RID/TS/Instrumenten groep |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| Relation: |
http://resolver.tudelft.nl/uuid:8775cff7-5db3-43b4-ba04-f7b25e13bdd7 |
| الاتاحة: |
http://resolver.tudelft.nl/uuid:8775cff7-5db3-43b4-ba04-f7b25e13bdd7 |
| Rights: |
undefined |
| رقم الانضمام: |
edsbas.55F7D448 |
| قاعدة البيانات: |
BASE |