The Spectral Conversion Layer Incorporated with Species of LDS and UC Phosphors on Single-Junction GaAs Solar Cells to Enhance Photovoltaic Performance

In this study, we examined efforts to increase the photovoltaic performance of GaAs single-junction solar cells using spectral conversion layers, respectively, composed of europium-doped (Eu-doped) phosphors, ytterbium/erbium-doped (Yb/Er-doped) phosphors, and a combination of Eu-doped and Yb/Er-doped phosphors. Spin-on film deposition was used to apply the conversion layers, all of which had a total phosphor concentration of 3 wt%. The chemical compositions of the phosphors were examined by energy-dispersive X-ray spectroscopy. The fluorescence emissions of the phosphors were confirmed by using photoluminescence measurements. Under laser diode excitation at 405 nm, we observed green luminescent downshift (LDS) emissions by Eu-doped phosphors at wavelengths of 479 nm to 557 nm, and under excitation at 980 nm, we observed red up-conversion (UC) emissions by Yb/Er-doped phosphors at wavelengths of 647 nm to 672 nm. The spectral conversion layers were characterized in terms of optical reflectance, external quantum efficiency, and photovoltaic current and voltage under AM 1.5 G simulations. The conversion efficiency of the cell combining Eu-doped and Yb/Er-doped phosphors (23.84%) exceeded that of the cell coated with Yb/Er-doped phosphors (23.72%), the cell coated with Eu-doped phosphors (23.19%), and the cell coated without phosphors (22.91%).

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The Spectral Conversion Layer Incorporated with Species of LDS and UC Phosphors on Single-Junction GaAs Solar Cells to Enhance Photovoltaic Performance

2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC) ◽

10.1109/pvsc.2018.8547602 ◽

2018 ◽

Author(s):

Wen-Jeng Ho ◽

Zong-Xian Lin ◽

Wen-Bin Bai ◽

Jheng-Jie Liu ◽

Guan-Yu Chen ◽

...

Keyword(s):

Solar Cells ◽

Photovoltaic Performance ◽

Single Junction ◽

Spectral Conversion

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Numerical Simulation of Single Junction InGaN Solar Cell by SCAPS

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.821.407 ◽

2019 ◽

Vol 821 ◽

pp. 407-413 ◽

Cited By ~ 2

Author(s):

Mohamed Orabi Moustafa ◽

Tariq Alzoubi

Keyword(s):

Solar Cells ◽

Solar Cell ◽

Collection Efficiency ◽

Short Circuit ◽

Photovoltaic Performance ◽

Surface Recombination ◽

Short Circuit Current ◽

Short Circuit Current Density ◽

Bandgap Energy ◽

Single Junction

The performance of the InGaN single-junction thin film solar cells has been analyzed numerically employing the Solar Cell Capacitance Simulator (SCAPS-1D). The electrical properties and the photovoltaic performance of the InGaN solar cells were studied by changing the doping concentrations and the bandgap energy along with each layer, i.e. n-and p-InGaN layers. The results reveal an optimum efficiency of the InGaN solar cell of ~ 15.32 % at a band gap value of 1.32 eV. It has been observed that lowering the doping concentration NA leads to an improvement of the short circuit current density (Jsc) (34 mA/cm2 at NA of 1016 cm−3). This might be attributed to the increase of the carrier mobility and hence an enhancement in the minority carrier diffusion length leading to a better collection efficiency. Additionally, the results show that increasing the front layer thickness of the InGaN leads to an increase in the Jsc and to the conversion efficiency (η). This has been referred to the increase in the photogenerated current, as well as to the less surface recombination rate.

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Spray Pyrolyzed TiO2 Embedded Multi-Layer Front Contact Design for High-Efficiency Perovskite Solar Cells

Nano-Micro Letters ◽

10.1007/s40820-020-00559-2 ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

Md. Shahiduzzaman ◽

Mohammad Ismail Hossain ◽

Sem Visal ◽

Tetsuya Kaneko ◽

Wayesh Qarony ◽

...

Keyword(s):

Solar Cells ◽

High Performance ◽

High Efficiency ◽

Photovoltaic Performance ◽

Perovskite Solar Cells ◽

Three Dimensional ◽

Cost Effective ◽

Transport Layer ◽

Electron Transport Layer ◽

Single Junction

AbstractThe photovoltaic performance of perovskite solar cells (PSCs) can be improved by utilizing efficient front contact. However, it has always been a significant challenge for fabricating high-quality, scalable, controllable, and cost-effective front contact. This study proposes a realistic multi-layer front contact design to realize efficient single-junction PSCs and perovskite/perovskite tandem solar cells (TSCs). As a critical part of the front contact, we prepared a highly compact titanium oxide (TiO2) film by industrially viable Spray Pyrolysis Deposition (SPD), which acts as a potential electron transport layer (ETL) for the fabrication of PSCs. Optimization and reproducibility of the TiO2 ETL were discreetly investigated while fabricating a set of planar PSCs. As the front contact has a significant influence on the optoelectronic properties of PSCs, hence, we investigated the optics and electrical effects of PSCs by three-dimensional (3D) finite-difference time-domain (FDTD) and finite element method (FEM) rigorous simulations. The investigation allows us to compare experimental results with the outcome from simulations. Furthermore, an optimized single-junction PSC is designed to enhance the energy conversion efficiency (ECE) by > 30% compared to the planar reference PSC. Finally, the study has been progressed to the realization of all-perovskite TSC that can reach the ECE, exceeding 30%. Detailed guidance for the completion of high-performance PSCs is provided.

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The effect of tailoring electron/hole blocking layers on the photovoltaic performance of the single junction solar cells

2012 38th IEEE Photovoltaic Specialists Conference ◽

10.1109/pvsc.2012.6318110 ◽

2012 ◽

Author(s):

Ming-Han Hsieh ◽

Yuh-Renn Wu ◽

Jasprit Singh

Keyword(s):

Solar Cells ◽

Photovoltaic Performance ◽

Electron Hole ◽

Single Junction

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Characterization of Luminescent Down-Shifting Spectral Conversion Effects on Silicon Solar Cells with Various Combinations of Eu-Doped Phosphors

Materials ◽

10.3390/ma15020452 ◽

2022 ◽

Vol 15 (2) ◽

pp. 452

Author(s):

Wen-Jeng Ho ◽

Jheng-Jie Liu ◽

Bo-Xun Ke

Keyword(s):

Solar Cells ◽

Photovoltaic Performance ◽

Control Cell ◽

Fluorescence Emission ◽

Front Surface ◽

Single Species ◽

Silicon Solar Cells ◽

Solar Simulator ◽

Spectral Conversion

Luminescent down-shifting (LDS) spectral conversion is a feasible approach to enhancing the short-wavelength response of single junction solar cells. This paper presents the optical and electrical characteristics of LDS spectral conversion layers containing a single species or two species of Eu-doped phosphors applied to the front surface of silicon solar cells via spin-on coating. The chemical composition, surface morphology, and fluorescence emission of the LDS layers were respectively characterized using energy-dispersive X-ray analysis, optical imaging, and photoluminescence measurements. We also examined the LDS effects of various phosphors on silicon solar cells in terms of optical reflectance and external quantum efficiency. Finally, we examined the LDS effects of the phosphors on photovoltaic performance by measuring photovoltaic current density–voltage characteristics using an air-mass 1.5 global solar simulator. Compared to the control cell, the application of a single phosphor enhanced efficiency by 17.39% (from 11.14% to 13.07%), whereas the application of two different phosphors enhanced efficiency by 31.63% (from 11.14% to 14.66%).

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