Optimization of light absorption in ultrathin elliptical silicon nanowire arrays for solar cell applications

.The effects of geometry and horizontal positioning of ultrathin triangular silicon nanowires (SiNWs) on the function of solar cells (SCs) have been investigated. Two differentiated methods have been presented to improve the current density of SiNW-SCs. First, a semiperiodic array is used for better utilization of the optical antenna effect. In the second method, several NWs with different geometries are used to achieve broadband absorption. The key to increase absorption is irregularity. Therefore, maximum light absorption is achieved by introducing irregular NWs. A set of optimized irregular NWs have better properties compared to other broadband structures. Using irregular NW arrays, the increase in the absorption of SCs can be improved without applying more absorbent materials. Optimization processes are used to obtain the maximum current density of SCs.

show abstract

“…In these studies, the geometrical design of NWs has been modified to increase absorption in SCs 48 – 53 …”

Section: Introductionmentioning

confidence: 99%

“…In these studies, the geometrical design of NWs has been modified to increase absorption in SCs. [48][49][50][51][52][53] Absorption in an array of NWs can be quite different from in single NWs due to the interconnection between the NWs. Optical antenna effects are also influenced in NW arrays.…”

Section: Introductionmentioning

confidence: 99%

Light absorption enhancement of silicon solar cell based on horizontal nanowire arrays

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Materials made from silicon and its compounds are actively used for some applications [78][79][80][81], among which should be noted the production of diodes, integrated circuits, other semiconductor devices [78,81,82], solar cells [83,84], in medicine [85], in optics, and in photonics [86][87][88][89]. Moreover, it is worth noting the active development of silicon photonics [90][91][92], including for the implementation of new accelerators for deep learning [93][94][95].…”

Section: Introductionmentioning

confidence: 99%

The Features of the Optical Traps Formation Using Silicon Ring Gratings with Variable Height

Savelyev

2023

Photonics

View full text Add to dashboard Cite

Features of the diffraction of Gaussian beams and Laguerre–Gaussian modes on subwavelength optical 3D microstructures with variable relief heights are calculated and studied in this paper. Silicon subwavelength ring gratings and diffraction axicons were considered as such optical microstructures. The height of individual relief elements varied. The propagation of laser light through the proposed optical elements was simulated using the finite difference time domain (FDTD) method. It was shown that it is possible to select the height of individual relief rings of ring gratings in such a way that it is possible to reduce the size of the focal spot down to 0.36 λ, form an extended light segment (up to 5.79 λ), and form optical traps.

show abstract

“…Silicon-based SCs have proved effective yet they are expensive to manufacture. Promising approaches to minimization of light reflectivity and improvement of solar absorption include the use of metallic nanoparticles [1]; transparent nanostructured electrodes [2,3]; and various microstructures and nanostructures as anti-reflective coatings (ARC), such as pyramids [4], rectangular grooves [5], pillars [6], nanowires (NWs) [7,8] and nano-cones [9].…”

Section: Introductionmentioning

confidence: 99%

Ultra-thin broadband solar absorber based on stadium-shaped silicon nanowire arrays

Mortazavifar

Salehi

Shahraki

et al. 2022

Front. Optoelectron.

Self Cite

View full text Add to dashboard Cite

This paper investigates how the dimensions and arrangements of stadium silicon nanowires (NWs) affect their absorption properties. Compared to other NWs, the structure proposed here has a simple geometry, while its absorption rate is comparable to that of very complex structures. It is shown that changing the cross-section of NW from circular (or rectangular) to a stadium shape leads to change in the position and the number of absorption modes of the NW. In a special case, these modes result in the maximum absorption inside NWs. Another method used in this paper to attain broadband absorption is utilization of multiple NWs which have different geometries. However, the maximum enhancement is achieved using non-close packed NW. These structures can support more cavity modes, while NW scattering leads to broadening of the absorption spectra. All the structures are optimized using particle swarm optimizations. Using these optimized structures, it is viable to enhance the absorption by solar cells without introducing more absorbent materials. Graphical Abstract

show abstract

Optimization of light absorption in ultrathin elliptical silicon nanowire arrays for solar cell applications

Cited by 14 publications

References 72 publications

Light absorption enhancement of silicon solar cell based on horizontal nanowire arrays

Light absorption enhancement of silicon solar cell based on horizontal nanowire arrays

The Features of the Optical Traps Formation Using Silicon Ring Gratings with Variable Height

Ultra-thin broadband solar absorber based on stadium-shaped silicon nanowire arrays

Contact Info

Product

Resources

About