R. El-Bashar, Mohamed Farhat O. Hameed, Hamdy Abdelhamid, S. S. A. Obayya
{"title":"Optical and electrical characteristics of dome tapered silicon nanowires for efficient photovoltaic solar energy conversion","authors":"R. El-Bashar, Mohamed Farhat O. Hameed, Hamdy Abdelhamid, S. S. A. Obayya","doi":"10.1007/s11082-024-07618-7","DOIUrl":null,"url":null,"abstract":"<div><p>The optical and electrical characteristics of novel dome-shaped nanowires (NWs) are reported for energy harvesting applications. In order to show the superiority of the suggested design, a comparison is made with cylindrical and other tapered nanowires such as conical and horn-shaped NWs. A tapering parameter is introduced to control the NW geometry and its optical and electrical efficiency. Further, the different geometrical parameters are investigated using finite difference time domain to minimize the light reflection and maximize the absorption through the suggested designs. It is evident that the tapering parameter effectively can control the NW-tip geometry to achieve optimum light coupling. The dome-shaped NW design has a good light confinement with better absorption compared to the horn and conical NW structures. This is due to the supported MIE-based mode resonances over a broad wavelength range. Further, the top diameter of the dome-shaped NWs supports more guided modes with high intensity and better light coupling. Besides, the light reflections between the tapered NWs improve the light coupling with the NWs where the optical path length of low frequencies is increased with improved light absorption. Therefore, the reported design with tapering factor of 2.2 achieves an average absorption of 81% with an improvement of 9.5% over the absorption of the conical NWs SC. Further, photo-generated current density and optical efficiency of 37 mA/cm<sup>2</sup> and 41% are obtained by the reprted design with an enhancement of 22% and 8.8% compared to conventional cylindrical and conical NWs, respectively. Further, the electrical efficiency is simulated using the finite element method considering the recombination effects. The power conversion efficiency of the dome-shaped array is equal to 15.96%, with an enhancement of 32% and 17.5% relative to cylindrical and conical NWs, respectively. The fine-tapered NW with a dome-shaped design is a crucial step toward realizing highly efficient NWs–SC with cost-effective material savings.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 1","pages":""},"PeriodicalIF":3.3000,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical and Quantum Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11082-024-07618-7","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
The optical and electrical characteristics of novel dome-shaped nanowires (NWs) are reported for energy harvesting applications. In order to show the superiority of the suggested design, a comparison is made with cylindrical and other tapered nanowires such as conical and horn-shaped NWs. A tapering parameter is introduced to control the NW geometry and its optical and electrical efficiency. Further, the different geometrical parameters are investigated using finite difference time domain to minimize the light reflection and maximize the absorption through the suggested designs. It is evident that the tapering parameter effectively can control the NW-tip geometry to achieve optimum light coupling. The dome-shaped NW design has a good light confinement with better absorption compared to the horn and conical NW structures. This is due to the supported MIE-based mode resonances over a broad wavelength range. Further, the top diameter of the dome-shaped NWs supports more guided modes with high intensity and better light coupling. Besides, the light reflections between the tapered NWs improve the light coupling with the NWs where the optical path length of low frequencies is increased with improved light absorption. Therefore, the reported design with tapering factor of 2.2 achieves an average absorption of 81% with an improvement of 9.5% over the absorption of the conical NWs SC. Further, photo-generated current density and optical efficiency of 37 mA/cm2 and 41% are obtained by the reprted design with an enhancement of 22% and 8.8% compared to conventional cylindrical and conical NWs, respectively. Further, the electrical efficiency is simulated using the finite element method considering the recombination effects. The power conversion efficiency of the dome-shaped array is equal to 15.96%, with an enhancement of 32% and 17.5% relative to cylindrical and conical NWs, respectively. The fine-tapered NW with a dome-shaped design is a crucial step toward realizing highly efficient NWs–SC with cost-effective material savings.
期刊介绍：
Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest.
Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.
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