Comparison Between Al- and B-Doped Zno Window Layers For CuInSe2Thin Film Solar Cells

1996 ◽  
Vol 426 ◽  
Author(s):  
T. Nakada ◽  
N. Murakami ◽  
A. Kunioka
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Thin Film Solar Cells ◽  
Device Performance ◽  
Doped Zno ◽  
Window Material ◽  
Sputter Deposited ◽  
First Time

AbstractA comparative study of several properties of ZnO:Al and ZnO:B films grown by magnetron sputtering has been performed. The influence of these window layers on device performance has also been investigated. Sputter-deposited ZnO:B films were used for the first time as a window material of CIS thin film solar cells. The short circuit current was improved by replacing ZnO:Al with ZnO:B window layers. A discussion of the issues relating to ZnO window layers for improving cell performance is presented.

scholarly journals Improved Metal Oxide Electrode for CIGS Solar Cells: The Application of an AgOX Wetting Layer

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Nils Neugebohrn ◽  
Norbert Osterthun ◽  
Maximilian Götz-Köhler ◽  
Kai Gehrke ◽  
Carsten Agert
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Metal Oxide ◽  
Metal Layer ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Thin Film Solar Cells ◽  
Wetting Layer ◽  
Transparent Conductive Oxides ◽  
Effective Measure

AbstractOxide/metal/oxide (OMO) layer stacks are used to replace transparent conductive oxides as front contact of thin-film solar cells. These multilayer structures not only reduce the overall thickness of the contact, but can be used for colouring of the cells utilizing interference effects. However, sheet resistance and parasitic absorption, both of which depend heavily on the metal layer, should be further reduced to reach higher efficiencies in the solar cells. In this publication, AgOX wetting layers were applied to OMO electrodes to improve the performance of Cu(In,Ga)Se2 (CIGS) thin-film solar cells. We show that an AgOX wetting layer is an effective measure to increase transmission and conductivity of the multilayer electrode. With the presented approach, we were able to improve the short-circuit current density by 18% from 28.8 to 33.9 mA/cm2 with a metal (Ag) film thickness as low as 6 nm. Our results highlight that OMO electrodes can be an effective replacement for conventional transparent conductive oxides like aluminium-doped zinc oxide on thin-film solar cells.

Nanoimprint Photonic Crystal Film Enhanced Light-Trapping in a-Si Thin Film Solar Cells

2011 ◽  
Vol 110-116 ◽  
pp. 497-502
Author(s):  
Wei Ping Chu ◽  
Fuh Shyang Juang ◽  
Jian Shian Lin ◽  
Tien Chai Lin ◽  
Chen Wei Kuo
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Photonic Crystals ◽  
Current Density ◽  
Light Trapping ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Thin Film Solar Cells ◽  
Uv Lamp

We utilize photonic crystals to enhanced lighttrapping in a-Si:H thin film solar cells. The photonic crystals effectively increase Haze ratio of glass and decrease reflectance of a-Si:H solar cells. Therefore, increase the photon path length to obtain maximum absorption of the absorber layer. The photonic crystals can effective in harvesting weakly absorbing photons with energies just above the band edge. We were spin coated UV glue on the glass, and then nanoimprint of photonic crystals pattern. Finally, used UV lamp was curing of UV glue on the glass. When the 45∘composite photonic crystals structures, the haze was increase to 87.9 %, resulting the short circuit current density and efficiency increasing to 13.96 mA/cm2 and 7.39 %, respectively. Because 45∘composite photonic crystals easy to focus on the point of light lead to the effect of scattering can’t achieve. So, we designs 90∘V-shaped photonic crystals structures to increase scattering. When the 90∘V-shaped photonic crystals structures, the Haze was increase to 93.9 %. Therefore, the short circuit current density and Efficiency increasing to 15.62 mA/cm2 and 8.09 %, respectively. We observed ~35 % enhancement of the short-circuit current density and ~31 % enhancement of the conversion efficiency.

Analysis of short circuit current gains by an anti-reflective textured cover on silicon thin film solar cells

2012 ◽  
Vol 21 (8) ◽  
pp. 1672-1681 ◽  
Author(s):  
Carolin Ulbrich ◽  
Andreas Gerber ◽  
Ko Hermans ◽  
Andreas Lambertz ◽  
Uwe Rau
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Thin Film Solar Cells ◽  
Silicon Thin Film

scholarly journals Enhanced Light Trapping in Thin Film Solar Cells Using a Plasmonic Fishnet Structure

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Sayan Seal ◽  
Vinay Budhraja ◽  
Liming Ji ◽  
Vasundara V. Varadan
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Light Trapping ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Wire Mesh ◽  
Thin Film Solar Cells ◽  
Plasmonic Structures ◽  
Spacer Layer ◽  
High Absorption

Incorporating plasmonic structures into the back spacer layer of thin film solar cells (TFSCs) is an efficient way to improve their performance. The fishnet structure is used to enhance light trapping. Unlike other previously suggested discrete plasmonic particles, the fishnet is an electrically connected wire mesh that does not result in light field localization, which leads to high absorption losses. The design was verified experimentally. A silver fishnet structure was fabricated using electron beam lithography (EBL) and thermal evaporation. The final fabricated structure optically resembles a TFSC. The results predicted by numerical simulations were reproduced experimentally on a fabricated sample. We show that light absorption in the a-Si absorber layer is enhanced by a factor of 10.6 at the design wavelength of 690 nm due to the presence of the fishnet structure. Furthermore, the total absorption over all wavelengths was increased by a factor of 3.2. The short-circuit current of the TFSC was increased by 30% as a result of including the fishnet.

scholarly journals Features of model thin-film solar cells photoelectric characteristics based on a non-toxic multi-component connection CuZn2AlS4

2021 ◽  
Vol 5 (3) ◽  
pp. 242-250
Author(s):  
D. Sergeyev ◽  
K. Shunkeyev ◽  
B. Kuatov ◽  
N. Zhanturina
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Quantum Efficiency ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Thin Film Solar Cells ◽  
Current Voltage

In this paper, the features of the characteristics of model thin-film solar cells based on the non-toxic multicomponent compound CuZn2AlS4 (CZAS) are considered. The main parameters (open-circuit voltage, short-circuit current, fill factor, efficiency) and characteristics (quantum efficiency, current-voltage characteristic) of thin-film solar cells based on CZAS have been determined. The minimum optimal thickness of the CZAS absorber is found (1-1.25 microns). Deterioration of the performance of solar cells with an increase in operating temperature (280-400 K) is shown. It is revealed that in the wavelength range of 390-500 nm CZAS has a high external quantum efficiency, which allows its use in designs of multi-junction solar cells designed to absorb solar radiation in the specified range. It is shown that the combination of CZAS films with a buffer layer of non-toxic ZnS increases the performance of solar cells.

scholarly journals Light Scattering and Current Enhancement for Microcrystalline Silicon Thin-Film Solar Cells on Aluminium-Induced Texture Glass Superstrates with Double Texture

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Yunfeng Yin ◽  
Nasim Sahraei ◽  
Selvaraj Venkataraj ◽  
Sonya Calnan ◽  
Sven Ring ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Optical Scattering ◽  
Thin Film Solar Cells ◽  
Surface Topology ◽  
Microcrystalline Silicon ◽  
Silicon Thin Film ◽  
Wide Range

Microcrystalline silicon (μc-Si:H) thin-film solar cells are processed on glass superstrates having both micro- and nanoscale surface textures. The microscale texture is realised at the glass surface, using the aluminium-induced texturing (AIT) method, which is an industrially feasible process enabling a wide range of surface feature sizes (i.e., 700 nm–3 μm) of the textured glass. The nanoscale texture is made by conventional acid etching of the sputter-deposited transparent conductive oxide (TCO). The influence of the resulting “double texture” on the optical scattering is investigated by means of atomic force microscopy (AFM) (studying the surface topology), haze measurements (studying scattering into air), and short-circuit current enhancement measurements (studying scattering into silicon). A predicted enhanced optical scattering efficiency is experimentally proven by a short-circuit current enhancementΔIscof up to 1.6 mA/cm2(7.7% relative increase) compared to solar cells fabricated on a standard superstrate, that is, planar glass covered with nanotextured TCO. Enhancing the autocorrelation length (or feature size) of the AIT superstrates might have the large potential to improve theμc-Si:H thin-film solar cell efficiency, by reducing the shunting probability of the device while maintaining a high optical scattering performance.

Effect of Location of Sodium Precursor on the Morphological and Device Properties of CIGS Solar Cells

2013 ◽  
Vol 1538 ◽  
pp. 51-60 ◽  
Author(s):  
Neelkanth G. Dhere ◽  
Ashwani Kaul ◽  
Helio Moutinho
Keyword(s):  
Thin Film ◽  
Surface Roughness ◽  
Solar Cells ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Thin Film Solar Cells ◽  
Cigs Solar Cells ◽  
Device Properties ◽  
Open Circuit Voltages

ABSTRACTSodium plays an important role in the development of device quality CIGS (Cu-In-Ga-Se) and CIGSeS (Cu-In-Ga-Se-S) chalcopyrite thin film solar cells. In this study the effect of location of sodium precursor on the device properties of CIGS solar cells was studied. Reduction in the surface roughness and improvement in the crystallinity and morphology of the absorber films was observed with increase in sodium quantity from 0 Å to 40 Å and to 80 Å NaF. It was found that absorber films with 40 Å and 80 Å NaF in the front of the metallic precursors formed better devices compared to those with sodium at the back. Higher open circuit voltages and short circuit current values were achieved for devices made with these absorber films as well.

scholarly journals Advances in Evaporated Solid-Phase-Crystallized Poly-Si Thin-Film Solar Cells on Glass (EVA)

2008 ◽  
Vol 2008 ◽  
pp. 1-10 ◽  
Author(s):  
O. Kunz ◽  
Z. Ouyang ◽  
J. Wong ◽  
A. G. Aberle
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solid Phase ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Device Fabrication ◽  
Thin Film Solar Cells ◽  
Large Area ◽  
Silicon Thin Film ◽  
Numerical Device

Polycrystalline silicon thin-film solar cells on glass obtained by solid-phase crystallization (SPC) of PECVD-deposited a-Si precursor diodes are capable of producing large-area devices with respectable photovoltaic efficiency. This has not yet been shown for equivalent devices made from evaporated Si precursor diodes (“EVA” solar cells). We demonstrate that there are two main problems for the metallization of EVA solar cells: (i) shunting of the p-n junction when the air-side metal contact is deposited; (ii) formation of the glass-side contact with low contact resistance and without shunting. We present a working metallization scheme and first current-voltage and quantum efficiency results of 2 cm2 EVA solar cells. The best planar EVA solar cells produced so far achieved fill factors up to 64%, series resistance values in the range of 4-5 Ωcm2, short-circuit current densities of up to 15.6 mA/cm2, and efficiencies of up to 4.25%. Using numerical device simulation, a diffusion length of about 4 μm is demonstrated for such devices. These promising results confirm that the device fabrication scheme presented in this paper is well suited for the metallization of EVA solar cells and that the electronic properties of evaporated SPC poly-Si materials are sufficient for PV applications.

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