Abstract:
Perovskite solar cells (PSCs) have emerged as a promising technology for next-generation photovoltaics due to their high power conversion efficiency and low-cost fabrication. CH3NH3PbI3, a hybrid organic-inorganic perovskite material, has attracted significant attention as a light-absorbing layer in PSCs. The morphological and optoelectronic properties of CH3NH3PbI3 thin films play a crucial role in determining the device performance. Annealing is a commonly employed post-deposition process that can significantly influence the film morphology and enhance the optoelectronic properties of perovskite films.
This study investigates the effect of annealing on the morphological and optoelectronic properties of CH3NH3PbI3 thin films for perovskite solar cell applications. The CH3NH3PbI3 thin films were prepared using a solution-based method, and different annealing temperatures and durations were employed to optimize the film properties. The morphological characterization was carried out using scanning electron microscopy (SEM) and atomic force microscopy (AFM) to evaluate the surface morphology, grain size, and film uniformity. The optoelectronic properties, including the absorption spectrum, photoluminescence (PL) spectra, and charge carrier dynamics, were studied using UV-Vis spectroscopy and time-resolved photoluminescence measurements.
The results demonstrate that annealing significantly influences the morphological and optoelectronic properties of the CH3NH3PbI3 thin films. Proper annealing conditions lead to improved film morphology, such as larger and more uniform grains, reduced surface defects, and enhanced film coverage. These morphological improvements contribute to enhanced light absorption and reduced charge recombination, resulting in improved device performance. Moreover, annealing helps in the formation of the desired perovskite crystal structure, leading to improved crystallinity and stability of the films.
However, excessive annealing can lead to film degradation and the formation of undesired phases. Therefore, optimization of annealing conditions is essential to achieve the desired film properties. The findings of this study provide valuable insights into the role of annealing in tailoring the morphological and optoelectronic properties of CH3NH3PbI3 thin films, which can contribute to the development of highly efficient and stable perovskite solar cells.
Keywords: perovskite solar cells, CH3NH3PbI3, thin films, annealing, morphological properties, optoelectronic properties, film characterization, device performance.
EFFECT OF ANNEALING ON THE MORPHOLOGICAL AND OPTOELECTRONIC PROPERTIES OF CH 3 NH 3 PB I 3 THIN FILMS FOR PEROVSKITE SOLAR CELL APPLICATIONS, GET MOREÂ BUILDING TECHNOLOGY PROJECT TOPICS AND MATERIALS
