Enhanced absorption in silicon nanocone arrays for photovoltaics

Wang, Baomin; Leu, Paul W.

doi:10.1088/0957-4484/23/19/194003

Cited by 137 publications

(93 citation statements)

References 32 publications

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“…The absorption coefficient of CZTS is greater than 10 4 / cm and therefore only a thin layer (1-2 lm) can absorb most of the incident photons (Zhao and Qiao et al 2014;Mainz et al 2014;Fan 2014;Tanaka et al 2007;Chen et al 2009;Yu et al 2012). It is known that nanocone structure is an optimal shape for enhancing the light absorption (Wang and Leu 2012). In the study of Wang et al it has been reported that nanocone arrays significantly improve the solar absorption and efficiencies over nanowire arrays (Hsu et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of wurtzite copper zinc tin sulfide nanocones for improved solar photovoltaic utilization

et al. 2014

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Cu 2 ZnSnS 4 (CZTS) is considered to be one of the most promising light absorbing materials for low-cost and high-efficiency thin-film solar cells. It is composed of earth abundant, non-toxic elements. In the present study, wurtzite CZTS nanocone has been synthesized by a green chemistry route. The nanocones have been characterized for its optical, structural and microstructural properties using UV-Vis spectrophotometer, X-ray diffraction, Raman spectroscopy and high-resolution transmission electron microscopy. Optical absorption result shows a band gap of 1.42 eV. XRD and Raman results show wurtzite structure and TEM studies reveal the nanocone structure of the grown material. Growing vertically aligned nanocone structure having smaller diameter shall help in enhancing the light absorption in broader range which shall enhance the efficiency of solar cell. This study is a step in this direction.

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Section: Introductionmentioning

confidence: 99%

Green synthesis of wurtzite copper zinc tin sulfide nanocones for improved solar photovoltaic utilization

et al. 2014

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“…Additionally, periodic vertical cone arrays form a promising family of structures that are currently under examination for PV technology. Wang et al proved that the light absorption can be considerably enhanced by using nanocones [69,70]. In addition, Ko et al [71] demonstrated that an ultimate efficiency of 28.9% can be obtained by decreasing the cone bottom diameter to 20 nm.…”

Section: State Of the Art Of Semiconductor Nanowire Solar Cellsmentioning

confidence: 99%

“…In this table, the calculated values of ƞ, J sc , V oc , FF, and PCE of the cylindrical [66], conical [70], Si funnel [29], and proposed plasmonic funnel SiNWs are listed in detail. It may be noted from this table that the V oc and PCE of the plasmonic funnel shape are higher than that reported in Refs.…”

Section: Plasmonic Funnel Sinwsmentioning

confidence: 99%

Recent Trends in Plasmonic Nanowire Solar Cells

Hussein¹,

Hameed²,

Obayya³

2017

Nanowires - New Insights

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Light trapping is crucial for low-cost and highly efficient nanowire (NW) solar cells (SCs). In order to increase the light absorption through the NWSCs, plasmonic materials can be incorporated inside or above the NW design. In this regard, two novel designs of plasmonic NWSCs are reported and analyzed using 3D finite difference time domain method. The geometrical parameters of the reported designs are studied to improve their electrical and optical efficiencies. The ultimate and power conversion efficiencies (PCE) are used to quantify the conversion efficiency of the light into electricity. The first design relies on funnel shaped SiNWs with plasmonic core while the cylindrical NWs of the second design are decorated by Ag diamond shaped. The calculated ultimate efficiency and PCE of the plasmonic funnel design are equal to 44% and 18.9%, respectively with an enhancement of 43.3 % over its cylindrical NWs counterpart. This enhancement can be explained by the coupling between the three optical modes, supported by the upper cylinder, lower cone and plasmonic material. Moreover, the cylindrical SiNWs decorated by Ag diamond offer an ultimate efficiency and short-circuit current density of 25.7%, and 21.03 mA∕cm 2 , respectively with an improvement of 63% over the conventional cylindrical SiNWs.

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“…However, weak absorption, especially in the long wavelength that near the vicinity of silicon bandgap edge, remains a challenge. To address this problem, textured active layer into nanostructure array have been extensively studied, such as nanowire [1][2][3], nanocone [4][5][6], nanohole and nanocone hole (NCH) [7,8] arrays. Among these, NCH arrays have been demonstrated with a promising capabilities of harvesting sunlight over a large wavelength [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…The top-sided NCH structure is mainly used for increasing the antireflection of incident light, while the bottom-sided NCH structure plays an important role in light trapping to achieve broadband absorption enhancement. Due to mechanical robustness and cost-effective fabrication process as compared to nanocone array [4][5][6], the proposed model possesses industrial manufacturing value.…”

Section: Introductionmentioning

confidence: 99%

Absorption enhancement in double-sided nanocone hole arrays for solar cells

Zhang¹,

Yu²,

Xi³

et al. 2015

J. Opt.

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Enhancing light absorption in thin-film silicon solar cells is important for improving light harvesting efficiency and reducing manufacture cost. In this paper, we introduce a double-sided nanocone hole (NCH) array structure for solar cells by extending a model suggested by Nano Lett. 12 1616. The topsided NCH structure is mainly used for increasing the antireflection of incident light, and the bottom-sided NCH structure for enhancing light trapping in the near-infrared spectrum. The theoretical analysis is performed on the proposed structure, from which the optimal geometric parameters of the structure are determined. The performance analysis shows that the proposed optimized double-sided NCH structure can yield a short-circuit current of 31.9 mA cm -2 with equivalent thickness of 1 μm, which is 12% and 190% higher than that of the top-sided NCH and planar film counterparts, respectively. Abstract: Enhancing light absorption in thin-film silicon solar cells is important for improving light harvesting efficiency and reducing manufacture cost. In this paper, we introduce a double-sided nanocone hole array (NCH) structure for solar cells by extending a model suggested by Wang et al. [Nano Lett. 12, 1616]. The top-sided NCH structure is mainly used for increasing the antireflection of incident light, and the bottom-sided NCH structure for enhancing light trapping in the near-infrared spectrum. The theoretical analysis is performed on the proposed structure, from which the optimal geometric parameters of the structure are determined. The performance analysis shows that the proposed optimized double-sided NCH structure can yield a short-circuit current of 31.9 mA/cm 2 with equivalent thickness of 1μm, which is 12% and 190% higher than that of the top-sided NCH and planar film counterparts respectively.

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Enhanced absorption in silicon nanocone arrays for photovoltaics

Cited by 137 publications

References 32 publications

Green synthesis of wurtzite copper zinc tin sulfide nanocones for improved solar photovoltaic utilization

Green synthesis of wurtzite copper zinc tin sulfide nanocones for improved solar photovoltaic utilization

Recent Trends in Plasmonic Nanowire Solar Cells

Absorption enhancement in double-sided nanocone hole arrays for solar cells

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