Enhancement of efficiency and external quantum efficiency of CIGSSe solar cell by replacement and inserting buffer and Cu2O ER-HTL layer

Priya, A. Kalai; Singh, Shiva Nand

doi:10.1016/j.spmi.2021.106840

Cited by 21 publications

(8 citation statements)

References 38 publications

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“…These buffer layers could provide the optimal combination of optical and electrical characteristics 62 . Related findings were reported by Priya and Singh, 2021 47 . However, the overall QE for Ag 2 S and PbS levels below 80% is relatively low, which may be due to reflection losses.…”

Section: Resultssupporting

confidence: 87%

Numerical simulation of quantum dots as a buffer layer in CIGS solar cells: a comparative study

Abdulghani

Najm

Holi

et al. 2022

Sci Rep

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Quantum bandgap buffer layers can improve sunlight absorption in the short wavelength region, hence improving the performance of CIGS solar cells. In this study, we use numerical modelling to determine the impact of various buffer layers' electrical characteristics on the performance of CIGS thin film photovoltaic devices, particularly, carrier concentration and the quantum effect. As well Ag2S buffer layer has been experimentally examined to fulfilment its effect in term of bulk and quantum bandgap. Experimental results depicted that, Ag2S QDs has polycrystalline nature of films, with smooth surface roughness, and average diameter 4 nm. Meanwhile, a simulation revealed that the Fermi level of the (n-buffer layer) material shifts closer to the conduction band with an increase in carrier concentration. The findings indicate that, a buffer layer with a wider bandgap and carrier concentration is an essential demand for achieving a device with a higher conversion efficiency and a broader bandgap-CBO window. It was attributed to beneficial synergistic effects of high carrier concentration and narrower depletion region, which enable carriers to overcome high CBO barrier. Most importantly, modelling results indicate that the optic-electrical characteristics of the buffer layer are critical in determining the progress of a CIGS solar cell.

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Section: Resultssupporting

confidence: 87%

Numerical simulation of quantum dots as a buffer layer in CIGS solar cells: a comparative study

Abdulghani

Najm

Holi

et al. 2022

Sci Rep

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show abstract

“…These materials of smaller bandgaps when deployed in planar architecture are the back layer and may absorb photons that reach them. [ 37 ]…”

Section: Resultsmentioning

confidence: 99%

“…For the initial results, flat band work function values were used for the electrodes, while later in the study different materials and work functions have been analyzed with the cells. The detailed design parameters of all the materials used as different layers in this investigation are consolidated in Table 1, [10,11,18,23,25,26,[32][33][34][35][36][37][38] providing a comprehensive reference for the composition and characteristics of each component.…”

Section: Device Modelingmentioning

confidence: 99%

Analyzing the Effect of Planar and Inverted Structure Architecture on the Properties of MAGeI₃ Perovskite Solar Cells

Jan,

Noman

2023

Energy Tech

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CTL have remarkable influence on the stability and efficiency of PSC. Different CTL combination used with the perovskite forms unique energy band alignment and electric field. They have significant effects on the optoelectrical properties of PSC. Identifying the right CTL for perovskite is crucial. In this work, the PSC of CH3NH3GeI3 are modeled in SCAPS‐1D with 13 CTL. Because of their high carrier‐mobility, chemical‐stability, and excellent electric/thermal conductivity, copper, kesterite and carbon CTL have been selected. The PSC was analyzed in planar(n‐i‐p) and inverted(p‐i‐n). A systematic approach has been adopted to analyze the influence of CTL on the quantum‐efficiency, absorption, transmissivity, band‐alignment, electric‐field, recombination, and IV‐characteristics in both architectures. To further enhance the efficiency, design optimization of layer thickness and doping has been carried‐out. Moreover, the effect of defects, temperature, reflection, and front/back workfunctions on the performance of PSC has also been studied. Based on the results PCBM performed better in planar while C60 performed better in inverted. Most of the Cu‐HTL performed better in inverted architecture while most of the kesterite‐HTLs performed better in planar architecture. The best‐performing inverted perovskite structures was PCBM/Per/CuAlO2 with PCE of 24.32 %, while the best planar structure was C60/Per/CuAlO2 with PCE of 14.82 %.This article is protected by copyright. All rights reserved.

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“…Materials having lower band gap than the absorber when used as HTL also contribute in the absorption of the optical spectrum. Photons which pass through the perovskite material to the HTL without being absorbed and fall under the optical absorption range of the kesterite material have a chance of being absorbed by it [27]. This not only contributes in improving the PCE of the cell but also the quantum efficiency.…”

Section: Characteristicsmentioning

confidence: 99%

Influence of absorption, energy band alignment, electric field, recombination, layer thickness, doping concentration, temperature, reflection and defect densities on MAGeI₃ perovskite solar cells with Kesterite HTLs

Jan¹,

Noman²

2022

Phys. Scr.

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Over the past decade, perovskite materials have emerged as promising absorber layers in photo voltaic (PV) cells. Germanium (Ge) based perovskite layers have attracted the attention of scientists because of its excellent photovoltaic properties and nontoxic nature. Selecting the right material for charge transport layers can further enhance the performance and stability of the cell. Kesterite compounds have shown excellent conductive properties in thin film PV cells (CIGS) as the active material, making them an option to be used as hole transport layer (HTL) in perovskite solar cells. In this work the Ge based perovskite solar cell (PSC) of methyl ammonium germanium tri-iodide (MAGeI3) is numerically modelled using SCAPS-1D with 6 kesterite quaternary compounds as HTLs. A systematic methodology is adopted to analyze the effect of the kesterite materials on the absorption, quantum efficiency, energy band alignment, electric field intensity, recombination rate, carrier density, thickness, doping concentration, temperature, reflection and interface defect densities of the PSC in detail. 4 oxide/sulphide based electron transport layers (ETL) are also used in the cell structures. A total of unique 24 different kesterite-germanium PSC structures were modeled from all possible combinations of the different layers. The PSC parameters of all the structures are optimized, which enhance the performance of the PSC up to 7% more. Based on the simulation results the best performing perovskite structures were TiO2/Per/CZTS and SnO2/Per/CZTS with PCE of 24.57% & 24.87%, Jsc of 16.13 mA/cm2 & 16.32 mA/cm2, Voc of 1.730V & 1.733V and F.F of 88.10% & 88.101% respectively.

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Enhancement of efficiency and external quantum efficiency of CIGSSe solar cell by replacement and inserting buffer and Cu2O ER-HTL layer

Cited by 21 publications

References 38 publications

Numerical simulation of quantum dots as a buffer layer in CIGS solar cells: a comparative study

Numerical simulation of quantum dots as a buffer layer in CIGS solar cells: a comparative study

Analyzing the Effect of Planar and Inverted Structure Architecture on the Properties of MAGeI₃ Perovskite Solar Cells

Influence of absorption, energy band alignment, electric field, recombination, layer thickness, doping concentration, temperature, reflection and defect densities on MAGeI₃ perovskite solar cells with Kesterite HTLs

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Enhancement of efficiency and external quantum efficiency of CIGSSe solar cell by replacement and inserting buffer and Cu2O ER-HTL layer

Cited by 21 publications

References 38 publications

Numerical simulation of quantum dots as a buffer layer in CIGS solar cells: a comparative study

Numerical simulation of quantum dots as a buffer layer in CIGS solar cells: a comparative study

Analyzing the Effect of Planar and Inverted Structure Architecture on the Properties of MAGeI3 Perovskite Solar Cells

Influence of absorption, energy band alignment, electric field, recombination, layer thickness, doping concentration, temperature, reflection and defect densities on MAGeI3 perovskite solar cells with Kesterite HTLs

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Product

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Analyzing the Effect of Planar and Inverted Structure Architecture on the Properties of MAGeI₃ Perovskite Solar Cells

Influence of absorption, energy band alignment, electric field, recombination, layer thickness, doping concentration, temperature, reflection and defect densities on MAGeI₃ perovskite solar cells with Kesterite HTLs