High-efficiency photonic crystal solar cell architecture

Chutinan, Alongkarn; Kherani, Nazir P.; Żukotyński, S.

doi:10.1364/oe.17.008871

Cited by 121 publications

(73 citation statements)

References 11 publications

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“…Lately, we have seen simulation results that are comparable to the geometric light-trapping limit over a broad wavelength range for bi-periodic gratings. [16][17][18][19] Common for these structures is that the Lambertian light-trapping limit is exceeded at normal incidence, while the Lambertian limit, although theoretical, is independent of incidence angle.…”

Section: Introductionmentioning

confidence: 99%

Comparison of periodic light-trapping structures in thin crystalline silicon solar cells

Gjessing

Sudbø

Marstein

2011

Journal of Applied Physics

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Material costs may be reduced and electrical properties improved by utilizing thinner solar cells. Light trapping makes it possible to reduce wafer thickness without compromising optical absorption in a silicon solar cell. In this work we present a comprehensive comparison of the light-trapping properties of various bi-periodic structures with a square lattice. The geometries that we have investigated are cylinders, cones, inverted pyramids, dimples (half-spheres), and three more advanced structures, which we have called the roof mosaic, rose, and zigzag structure. Through simulations performed with a 20 μm thick Si cell, we have optimized the geometry of each structure for light trapping, investigated the performance at oblique angles of incidence, and computed efficiencies for the different diffraction orders for the optimized structures. We find that the lattice periods that give optimal light trapping are comparable for all structures, but that the light-trapping ability varies considerably between the structures. A far-field analysis reveals that the superior light-trapping structures exhibit a lower symmetry in their diffraction patterns. The best result is obtained for the zigzag structure with a simulated photo-generated current Jph of 37.3 mA/cm2, a light-trapping efficiency comparable to that of Lambertian light-trapping.

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Section: Introductionmentioning

confidence: 99%

Comparison of periodic light-trapping structures in thin crystalline silicon solar cells

Gjessing

Sudbø

Marstein

2011

Journal of Applied Physics

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“…Calculated optical reflectivity curves are also plotted for the cases of 1. mesas) and the untextured Si surface. Optical wave analysis based on the scattering matrix method [18] was used to simulate the total optical reflectance at normal incidence over the 280 nm-1000 nm spectrum. Reflectivity of the inverted pyramid texture on a 400 μm thick polished silicon wafer was calculated for a set pitch of 1.5 μm and inverted pyramid size of 1.13 μm and 1.3 μm.…”

Section: Optical Performancementioning

confidence: 99%

Ultrafast laser direct hard-mask writing for high efficiency c-Si texture designs

et al. 2013

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This study reports a high-resolution hard-mask laser writing technique to facilitate the selective etching of crystalline silicon (c-Si) into an inverted-pyramidal texture with feature size and periodicity on the order of the wavelength which, thus, provides for both anti-reflection and effective light-trapping of infrared and visible light. The process also enables engineered positional placement of the invertedpyramid thereby providing another parameter for optimal design of an optically efficient pattern. The proposed technique, a non-cleanroom process, is scalable for large area micro-fabrication of high-efficiency thin c-Si photovoltaics. Optical wave simulations suggest the fabricated textured surface with 1.3 μm inverted-pyramids and a single anti-reflective coating increases the relative energy conversion efficiency by 11% compared to the PERL-cell texture with 9 μm inverted pyramids on a 400 μm thick wafer. This efficiency gain is anticipated to improve further for thinner wafers due to enhanced diffractive light trapping effects.

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“…박막형 구조의 경우 흡수 층이 얇아 입사한 광자가 이동하는 경로가 짧아지기 때문에 일반적인 구조에 비해 상 대적으로 흡수효율이 떨어지게 된다. 그래서 실리콘 흡수 층 아래에 유전체 기판이나 금속 반사경을 배치하는 등의 구조 적 변화를 통해 광자의 이동경로를 증가시켜 흡수 효율을 높 이고자 하는 노력이 계속되고 있다 [2,3,4] . 의 모드간에 적절한 위상 정합 조건이 만족되면 서로 간에 강한 결합이 생기게 되고, 입사된 빛은 유전체 내부에서 유 전체를 따라 진행하게 되는데 이를 도파모드 공진이라 한다 [5,6,7] .…”

Section: 서 론unclassified

Enhanced Absorption Efficiency of Solar Cells Using Guided-mode Resonance

Kim¹,

Kim

Lee³

et al. 2010

Korean Journal of Optics and Photonics

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In this study, we propose a grating structure using guided-mode resonance (GMR) to increase the absorption efficiency of a silicon solar cell. The proposed solar cell design consists of a one-dimensional diffraction grating and a planar waveguide layer of poly-silicon deposited on a silver reflector. We investigate the influence of structure parameters such as grating period, waveguide thickness, grating width and grating depth. Optimal parameters are found using the particle swarm optimization (PSO) algorithm. In the optimized GMR-assisted solar cell, absorption efficiency up to 65.8% is achieved in the wavelength range of 300 nm~750 nm.

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High-efficiency photonic crystal solar cell architecture

Cited by 121 publications

References 11 publications

Comparison of periodic light-trapping structures in thin crystalline silicon solar cells

Comparison of periodic light-trapping structures in thin crystalline silicon solar cells

Ultrafast laser direct hard-mask writing for high efficiency c-Si texture designs

Enhanced Absorption Efficiency of Solar Cells Using Guided-mode Resonance

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