en سلول‌های خورشیدی Photovoltaic Cells پژوهشي Research <span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">Advancements in light-based technologies necessitate the development of optoelectronic devices for future renewable energy applications. A key challenge in enhancing the efficiency of organic solar cells (OSCs) lies in improving light absorption in the near-infrared (NIR) region, where conventional organic materials, such as P3HT:PCBM, suffer from inherently weak absorption. In this study, we introduce a hexagonal periodic array of aluminum (Al) nanocylinders as a low-cost and effective plasmonic platform to address this limitation. Using finite-difference time-domain (FDTD) simulations, we optimized the nanostructure embedded within the P3HT:PCBM active layer. The proposed design excites strong localized surface plasmon resonances (LSPRs), leading to a significant enhancement in near-field intensity and effective optical path length, particularly across the 650&ndash;1200 nm spectrum. Through systematic optimization of nanocylinder dimensions (height: 50 nm, radius: 15 nm) and array periodicity (21 nm), an optimal active layer thickness of 150 nm was identified. The resulting plasmonic OSC achieves a short-circuit current density (</span></span>&nbsp;<span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times=""><span style="position:relative"><span style="top:2.5pt"><img alt="" id="_x0000_i1025" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAUCAIAAADtKeFkAAAAAXNSR0IArs4c6QAAAAlwSFlzAAASdAAAEnQB3mYfeAAAALlJREFUOE/NVMENwyAMhM4S5dUJyD6wDizjDmN2IWdACWlTRQhVqV/G+DgbzuiUkhqwxwBWoPfjY1j0bu7V2RDuj70tIOMZyy6T/qe5cj7nqZP9D+6vt+Jj/v3v/+P6Y3BFX4sLsXI1MSVqoaofSx/ayVs5Dq/sbyH2RrX4U/mRRZIxlrhqcz9RDgOeCz1SvimXSZiqvN/xWBvr6Vz5KLFUlWvNbvbQirjAXk0Lhkvy2+naQuDVg//XCj7xIrePfIYnAAAAAElFTkSuQmCC" style="width:12.6pt; height:12pt" > </span></span></span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">) of 36.04 </span></span>&nbsp;<span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times=""><span style="position:relative"><span style="top:2.5pt"><img alt="" id="_x0000_i1025" src="data:image/png;base64,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" style="width:39pt; height:12pt" > </span></span></span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">,&nbsp;</span></span><span style="font-size:12.0pt"><span new="" roman="" style="font-family:" times="">twice the value&nbsp;</span></span><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">compared to a reference cell without nanoparticles. These results underscore the promising role of aluminum nanocylinders in enabling high-performance, thin-film, and cost-effective photovoltaic devices.</span></span> Aluminum nanocylinders, FDTD, Light trapping, Near-infrared absorption, Organic solar cells, Plasmonics. 191 206 http://ijop.ir/browse.php?a_code=A-10-1017-1&slc_lang=en&sid=1 Nasrin Sepahvand nasrinsepah62@gmail.com 10031947532846005365 10031947532846005365 No Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran Abdolmohammad Ghalambor Dezfuli a.ghalambor@scu.ac.ir 10031947532846005366 10031947532846005366 Yes Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran Mohsen Bahrami bahrami.m@lu.ac.ir 10031947532846005367 10031947532846005367 No Department of Physics, Faculty of Science, Lorestan University, Khorramabad, Iran