Transient photovoltage overshoot in multi-cation perovskite solar cells: An interplay between interfacial ionic layer and photoinduced electric field
| Autor: | Vidya Raj, Sudeshna Ghosh, Shaibal K. Sarkar |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Chemical physics Electric field Overshoot (microwave communication) Ionic bonding Perovskite solar cell Transient (oscillation) Fluence Surfaces Coatings and Films Electronic Optical and Magnetic Materials Perovskite (structure) Voltage |
| Zdroj: | Solar Energy Materials and Solar Cells. 230:111276 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2021.111276 |
| Popis: | The dynamics of correlated ionic-electronic components often get reflected in the measured photovoltage of a hybrid perovskite solar cell. This communication describes a unique overshoot voltage phenomenon that appears soon the light is turned off during the large signal photovoltage transient measurements at low (≤250K) temperature regime. The occurrence of the overshoot voltage largely depends on fluence, temperature and can be perturbed with device preconditioning. We observe that the phenomenon occurs only in TiO2 based devices but never if the electron transport layer is SnO2 indicating that the interface plays a major role. Our investigations reveal a strong correlation between the ionic movement and the transitory photogenerated electric field that are responsible for the momentary increase in the measured potential. |
| Databáze: | OpenAIRE |
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