Normal and Inverted Hysteresis in Perovskite Solar Cells
| Autor: | Marjan Ilkov, Kristinn Torfason, Lucian Pintilie, Lucia Leonat, Ioana Pintilie, Cristina Besleaga, Andrei Manolescu, George Alexandru Nemnes, Daniela Emilia Dogaru, V. Stancu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Horizontal scan rate
Condensed matter physics Open-circuit voltage Chemistry Time evolution Ionic bonding Nanotechnology 02 engineering and technology Negative bias 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Hysteresis General Energy Physical and Theoretical Chemistry 0210 nano-technology Polarization (electrochemistry) Perovskite (structure) |
| Zdroj: | The Journal of Physical Chemistry C. 121:11207-11214 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Hysteretic effects are investigated in perovskite solar cells in the standard FTO/TiO2/CH3NH3PbI3–xClx/spiro-OMeTAD/Au configuration. We report normal (NH) and inverted hysteresis (IH) in the J–V characteristics occurring for the same device structure, and the behavior strictly depends on the prepoling bias. NH typically appears at prepoling biases larger than the open circuit bias, while pronounced IH occurs for negative bias prepoling. The transition from NH to IH is marked by an intermediate mixed hysteresis behavior characterized by a crossing point in the J–V characteristics. The measured J–V characteristics are explained quantitatively by the dynamic electrical model. Furthermore, the influence of the bias scan rate on the NH/IH hysteresis is discussed based on the time evolution of the accumulated ionic and electronic polarization charge at the interfaces. Introducing a three-step measurement protocol, which includes stabilization, prepoling, and measurement, we put forward the difficulties and pos... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|