Lambertian and photonic light trapping analysis with thickness for GaAs solar cells based on 2D periodic pattern

Gupta, Nikhil Deep; Janyani, Vijay

doi:10.1049/iet-opt.2017.0002

Cited by 13 publications

(13 citation statements)

References 25 publications

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“…ARC, thus, requires to serve the purpose of index matching for the incident light with the absorbing layers and increase useful absorption of photons [4,9]. ARC in a simpler design can be carved out as a single planar layer whereas its performance can be improved with the incorporation of multiple layers to provide gradual change in refractive index [12,13]. In all, the ARC structure must have negligible reflections with insignificant absorption for the incident spectrum.…”

Section: Need Of Light Management For Solar Optoelectronic Devicesmentioning

confidence: 99%

“…They have performed the studies with ultra-thin GaAs layers from 100 to 300 nm and demonstrated that it is possible to tap almost 90% of the incident photons in the high wavelength range of 400-860 nm and achieved short circuit current density over 26.3 mA cm −2 . The quantitative analysis was further by Gupta et.al in [13] and provided the insight into the importance of the use of PNS-LMS for GaAs, including its effectiveness to improve the angular performance of the device. In one of the recent studies, Peer et al in [49] has demonstrated theoretically that microlens arrays-based LMS can effectively enhance PCE of perovskite SC, and experimentally showed that the micro-lens can enhance organic SC efficiency.…”

Section: Light Management Through Periodic Nanophotonic Structures Inmentioning

confidence: 99%

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Periodic Nanophotonic Structures-Based Light Management for Solar Energy Harvesting

Gupta¹

2021

Optoelectronics

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Solar energy has always been an obvious choice for solving the energy issues for the humans for centuries. The two most popular choices, out of many, to harness this infinite source of energy are: solar cells and photoelectrochemical cells. Although both these techniques are quite attractive, they have inherent limitations for tapping all of the incident photons. Maximizing the absorption of incident photons to produce maximum possible electrical output is always the main impetus for the researchers working to streamline these two techniques and making them compatible with existing sources of electrical energy. It has been well established that the light trapping in the solar cells and photoelectrochemical cells can play a vital role in improving their performance. To design light harvesting structures for both these applications, periodic nanophotonic structures have demonstrated stupendous results and shown that they have the real potential to enhance their performance. The chapter, in this regard, presents and reviews the current and historical aspects of the light harvesting structures for these two interesting applications and also discusses about the future of the research to further the performance of these large-area solar-to-electrical conversion transducers.

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Section: Need Of Light Management For Solar Optoelectronic Devicesmentioning

confidence: 99%

Section: Light Management Through Periodic Nanophotonic Structures Inmentioning

confidence: 99%

Periodic Nanophotonic Structures-Based Light Management for Solar Energy Harvesting

Gupta¹

2021

Optoelectronics

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“…Multilayer anti-reflective coatings with graded-index, refractive index, or high-low refractive index could conceivably be used to distribute light among sub-cells. [28][29][30][31][32] Nevertheless, light-trapping is generally more difficult in multiple-junction solar cells than in single-junction solar cells, 33,34 due to the need to preserve broadband absorption and deal with the issue of photo-current mismatch between sub-cells. In the current study, we developed a novel antireflective coating with surface nano-structures to enhance current matching and conversion efficiency in the top and middle cells of triplejunction (3 J) GaAs solar cells.…”

Section: Introductionmentioning

confidence: 99%

Light‐trapping and spectral modulation to increase the conversion efficiency of triple‐junction GaAs solar cells using antireflective coating comprising a periodic array of cone‐shaped TiO ₂ structures

Liu

Chen

et al. 2021

Intl J of Energy Research

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Summary This study sought to increase the conversion efficiency of triple‐junction GaAs solar cells via spectral light trapping through the application of a uniform TiO2 layer with an antireflective coating (ARC) comprising a periodic array of cone‐shaped TiO2 structures. The cone‐shaped TiO2 ARC structures were fabricated using a mask of polystyrene spheres (PS) of various diameters (600, 700, and 800 nm). This surface modification was meant to match external quantum efficiency (EQE) response and reflectance spectra in order to modulate the light‐trapping effects. In experiments, forward light scattering and reduced reflectivity were shown to improve the EQE response of the cells to beyond that of the cell with a uniform layer of TiO2. The average weighted EQE (EQEW) values of the cell with the proposed ARC (PS: 600 nm) exceeded that of cells with larger surface structure (PS: 700 or 800 nm). These modifications were also shown to increase short‐circuit current‐density (JSC) and conversion efficiency (η), as confirmed by photovoltaic current‐voltage measurements under AM 1.5G illumination. The cone‐shaped ARC structures also increased the acceptance angle and electrical output under solar illumination of a given duration. Compared to the reference cell, the cell with 600‐nm structures enhanced the EQEW by an impressive 40.26% (from 48.88% to 68.56%), JSC by 20.55% (from 9.73 to 11.73 mA/cm2), and η by 20.59% (from 20.98% to 25.30%).

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“…Variant daily sunlight in nature is the powerful energy resource, which can be found in many applications, 1‐5 especially for solar cell device input energy. However, the efficiency of such devices is still continuously improved 6,7 . There is another way of an application when the heat from sunlight can be used to form the thermal devices, 8,9 in which the direct thermal energy can be applied and the device functioned.…”

Section: Introductionmentioning

confidence: 99%

Thermo‐electro‐optic energy conversion using plasmonic island embedded silicon microring circuit

Bunruangses

Youplao

Punthawanunt

et al. 2020

Micro & Optical Tech Letters

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We propose the use of the thermo‐electro‐optic energy conversion system for daily sunlight charger. A circuit consists of a modified silicon microring circuit embedded by a plasmonic island at the center. The island materials consist of silicon‐graphene‐gold layers. The thermal expansion of the island materials from the daily sunlight can affect the change in island material lengths and transfer to the plasmon wave path difference, which can perform the energy conversion and a charger. In manipulation, the daily sunlight statistic from South East Asia, the significant daily charging mobility of 4.34 × 10−6 cm2. (V. s)−1/Vs with the input light power of 10 mW can be obtained, which may be useful for one of the selected alternative energy sources.

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Lambertian and photonic light trapping analysis with thickness for GaAs solar cells based on 2D periodic pattern

Cited by 13 publications

References 25 publications

Periodic Nanophotonic Structures-Based Light Management for Solar Energy Harvesting

Periodic Nanophotonic Structures-Based Light Management for Solar Energy Harvesting

Light‐trapping and spectral modulation to increase the conversion efficiency of triple‐junction GaAs solar cells using antireflective coating comprising a periodic array of cone‐shaped TiO ₂ structures

Thermo‐electro‐optic energy conversion using plasmonic island embedded silicon microring circuit

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Lambertian and photonic light trapping analysis with thickness for GaAs solar cells based on 2D periodic pattern

Cited by 13 publications

References 25 publications

Periodic Nanophotonic Structures-Based Light Management for Solar Energy Harvesting

Periodic Nanophotonic Structures-Based Light Management for Solar Energy Harvesting

Light‐trapping and spectral modulation to increase the conversion efficiency of triple‐junction GaAs solar cells using antireflective coating comprising a periodic array of cone‐shaped TiO 2 structures

Thermo‐electro‐optic energy conversion using plasmonic island embedded silicon microring circuit

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Light‐trapping and spectral modulation to increase the conversion efficiency of triple‐junction GaAs solar cells using antireflective coating comprising a periodic array of cone‐shaped TiO ₂ structures