Operating Mechanisms of Mesoscopic Perovskite Solar Cells through Impedance Spectroscopy and J-V Modeling.
Isaac ZarazúaSiraj SidhikTzarara Lopéz-LukeDiego EsparzaElder De la RosaJuan Reyes-GomezIván Mora SeróGermà Garcia-BelmontePublished in: The journal of physical chemistry letters (2017)
The performance of perovskite solar cell (PSC) is highly sensitive to deposition conditions, the substrate, humidity, and the efficiency of solvent extraction. However, the physical mechanism involved in the observed changes of efficiency with different deposition conditions has not been elucidated yet. In this work, PSCs were fabricated by the antisolvent deposition (AD) and recently proposed air-extraction antisolvent (AAD) process. Impedance analysis and J-V curve fitting were used to analyze the photogeneration, charge transportation, recombination, and leakage properties of PSCs. It can be elucidated that the improvement in morphology of perovskite film promoted by AAD method leads to increase in light absorption, reduction in recombination sites, and interstitial defects, thus enhancing the short-circuit current density, open-circuit voltage, and fill factor. This study will open up doors for further improvement of device and help in understanding its physical mechanism and its relation to the deposition methods.
Keyphrases
- solar cells
- room temperature
- minimally invasive
- physical activity
- dna damage
- mental health
- perovskite solar cells
- dna repair
- single cell
- high efficiency
- cell therapy
- magnetic resonance imaging
- high resolution
- single molecule
- computed tomography
- mesenchymal stem cells
- magnetic resonance
- gold nanoparticles
- fluorescent probe
- living cells
- molecularly imprinted
- solid state
- contrast enhanced