en تخصصي Special پژوهشي Research <p>To investigate the plasmonic effect in perovskite solar cells, the effect of depositing Au@SiO₂ nanoparticles on the top and the bottom of mesoporous TiO₂ layers was studied. First, Au@SiO₂ nanoparticles were synthesized. The particles were then deposited at the different interfaces of mesoporous TiO₂ layers. Although the two structures show approximately similar optical absorption, only cells with Au@SiO₂ nanoparticles deposited at the bottom of the mesoporous TiO₂ layers demonstrated an improved photocurrent performance compared to the reference cells. This structure shows a short-circuit current density (JSC) of 20.7 mA/cm² and open circuit voltage of 1081 mV. This enhancement may be attributed either to the interface surface engineering or plasmonic resonance of Au@SiO₂ nanoparticles depends to the NPs size and position. &nbsp;</p> Photovoltaic, Perovskite solar cells, Au@SiO2 nanoparticles, Plasmonic nanoparticles, Core-shell. 99 108 http://ijop.ir/browse.php?a_code=A-10-557-1&slc_lang=en&sid=1 Naemeh Aeineh 10031947532846002356 10031947532846002356 No Atomic and Molecular Group, Faculty of Physics, Yazd University, Yazd, Iran Nafiseh Sharifi 10031947532846002357 10031947532846002357 No Physics Department, University of Kashan, Kashan, Iran Abbas Behjat 10031947532846002358 10031947532846002358 Yes Photonics Research Group, Yazd University, Yazd, Iran