Narrow Results

Carrier generation is one of the important processes in solar cell operations. The generation rate depends on the number of photons absorbed by solar cell. This absorption of photons is affected by the reflection losses. The light trapping technique is used to minimize the reflection loss. In this work, a theoretical design of Effective Interface Antireflective Coating (EI-ARC) in solar cell is proposed which is based on the theory of Fabry–Perot interference filters. This design is composed of a space index layer with two subsystems of multilayer, which allows multiple reflections within it. It is shown that the combination of this two systems yields high transmission values over a narrow spectral range. This EI-ARC model increases the Internal Quantum Efficiency (IQE) and carrier generation rate of solar cell. These parameters are significant to raise the efficiency of the solar cell.

Metal nanoparticles have the ability to localize and strongly enhance the incident electromagnetic field due to the surface plasmon polariton. The coupling between AuNPs and ZnO thin films affects their emission properties. In this study, we prepared the ZnO/Al₂O₃/AuNPs multilayer films, and investigated the effect of spacer layer on enhancement and quenching of photoluminescence by surface plasmon. The emission intensities of the thin films vary when Al₂O₃ space layer with different thickness was embedded in the ZnO/Au films, consistent with theoretical predictions. The photoluminescence modulation is also made via controlling the polarization of the excitation source. The photoluminescence anisotropy of these systems shows that enhanced photoluminescence can be achieved through coupling of the emission from ZnO with the surface plasmon resonance of AuNPs.