Post annealing to improve the sheet resistance and uniformity of emitter for enhancing conversion efficiency of mass-produced mc-Si solar cells

2022 ◽  
Vol 138 ◽  
pp. 106316
Author(s):  
Lu Tang ◽  
Wang Li ◽  
Yahui Tian ◽  
Fei Xue ◽  
Zengnian Xin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Sheet Resistance ◽  
Conversion Efficiency ◽  
Post Annealing ◽  
Si Solar Cells

scholarly journals Post-Annealing Effect on Optical and Electronic Properties of Thermally Evaporated MoOX Thin Films as Hole-Selective Contacts for p-Si Solar Cells

2021 ◽  
Author(s):  
Yuanwei Jiang ◽  
Shuangying Cao ◽  
Linfeng Lu ◽  
Guanlin Du ◽  
Yinyue Lin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Work Function ◽  
Electronic Properties ◽  
Crystalline Silicon ◽  
Annealing Treatment ◽  
Crystalline Silicon Solar Cells ◽  
Post Annealing ◽  
Si Solar Cells ◽  
Optical And Electronic Properties ◽  
Large Work

Abstract Owing to its large work function, MoOX has been widely used for hole-selective contact in both thin film and crystalline silicon solar cells. In this work, thermally evaporated MoOX films are employed on the rear sides of p-type crystalline silicon (p-Si) solar cells, where the optical and electronic properties of the MoOX films as well as the corresponding device performances are investigated as a function of post-annealing treatment. The MoOX film annealed at 100oC shows the highest work function and proves the best hole selectivity based on the results of energy band simulation and contact resistivity measurements. The full rear p-Si/MoOX/Ag contacted solar cells demonstrate the best performance with an efficiency of 19.19%, which is the result of the combined influence of MoOX’s hole selectivity and passivation ability.

scholarly journals Efficiency Enhancement of Nanoporous Silicon/Polycrystalline-Silicon Solar Cells by Application of Trenched Electrodes

2014 ◽  
Vol 2014 ◽  
pp. 1-4
Author(s):  
Kuen-Hsien Wu ◽  
Chia-Chun Tang
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Polycrystalline Silicon ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Textured Surface ◽  
Surface Layers ◽  
Nanoporous Silicon ◽  
Si Solar Cells ◽  
A Tec

Trenched electrodes were proposed to enhance the short-circuit current and conversion efficiency of polycrystalline-silicon (poly-Si) solar cells with nanoporous silicon (NPS) surface layers. NPS films that served as textured surface layers were firstly prepared on heavily doped p+-type (100) poly-Si wafers by anodic etching process. Interdigitated trenches were formed in the NPS layers by a reactive-ion-etch (RIE) process and Cr/Al double-layered metal was then deposited to fill the trenches and construct trenched-electrode-contacts (TEC’s). Cells with TEC structures (called “TEC cells”) obtained 5.5 times higher short-circuit current than that of cells with planar electrode contacts (called “non-TEC cells”). Most significantly, a TEC cell achieved 8 times higher conversion efficiency than that of a non-TEC cell. The enhanced short-circuit current and conversion efficiency in TEC cells were ascribed to the reduced overall series resistance of devices. In a TEC cell, trenched electrodes provided photocurrent flowing routes that directly access the poly-Si substrates without passing through the high resistive NPS layers. Therefore, the application of NPS surface layers with trenched electrodes is a novel approach to development of highly efficient poly-Si solar cells.

Air-exposing microwave-assisted synthesis of CuInS2/ZnS quantum dots for silicon solar cells with enhanced photovoltaic performance

RSC Advances ◽  
2015 ◽  
Vol 5 (124) ◽  
pp. 102682-102688 ◽  
Author(s):  
Ming Hong ◽  
Tongtong Xuan ◽  
Jiaqing Liu ◽  
Ziyao Jiang ◽  
Yiwei Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Microwave Irradiation ◽  
Conversion Efficiency ◽  
Photovoltaic Performance ◽  
Composite Films ◽  
Silicon Solar Cells ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Si Solar Cells

CIS/ZnS QDs were synthesized by microwave irradiation in air. The fabricated QDs/PMMA composite films were first applied to Si solar cells to improve the conversion efficiency by 3.8%.

Effects of One-Dimensional Photonic Crystal on Thin Film Silicon Solar Cells

2013 ◽  
Vol 827 ◽  
pp. 49-53 ◽  
Author(s):  
Qi Wang ◽  
Hai Na Mo ◽  
Zi Qiao Lou ◽  
Ke Meng Yang ◽  
Yue Sun ◽  
...  
Keyword(s):  
Thin Film ◽  
Refractive Index ◽  
Solar Cells ◽  
Photonic Crystal ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
One Dimensional ◽  
Si Solar Cells ◽  
Refractive Index Difference

We have designed lateral contact thin film silicon-based solar cells with and without one-dimensional photonic crystals as back surface field layer. The photonic crystal comprises a distributed Bragg reflector (DBR) for trapping the light. Simulations demonstrate that energy conversion efficiency and short circuit current ISCfor c-Si solar cells with the photonic crystal structure are increased to 21.11% and 27.0 mA, respectively, from 18.33% and 22.8mA of the one without photonic crystal. In addition, the effects of DBRs consisting of different materials are investigated in our simulations. When the refractive index difference between sub-layers of the DBR is larger, the forbidden band width is broader, the reflectance of the DBR is higher, and more photons are reflected and trapped into the active region, then the absorption efficiency and the energy conversion efficiency of the solar cell are both increased. The bigger the refractive index difference of the DBRs sub-layers is, the broader the forbidden band width is. In addition, a-Si solar cells with and without DBR are also discussed.

scholarly journals Investigation of Low-Cost Surface Processing Techniques for Large-Size Multicrystalline Silicon Solar Cells

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Yuang-Tung Cheng ◽  
Jyh-Jier Ho ◽  
William J. Lee ◽  
Song-Yeu Tsai ◽  
Yung-An Lu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Silicon Nitride ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Short Circuit ◽  
Open Circuit ◽  
Multicrystalline Silicon ◽  
Double Layers ◽  
Large Size ◽  
Si Solar Cells

The subject of the present work is to develop a simple and effective method of enhancing conversion efficiency in large-size solar cells using multicrystalline silicon (mc-Si) wafer. In this work, industrial-type mc-Si solar cells with area of125×125 mm2were acid etched to produce simultaneouslyPOCl3emitters and silicon nitride deposition by plasma-enhanced chemical vapor deposited (PECVD). The study of surface morphology and reflectivity of different mc-Si etched surfaces has also been discussed in this research. Using our optimal acid etching solution ratio, we are able to fabricate mc-Si solar cells of 16.34% conversion efficiency with double layers silicon nitride (Si3N4) coating. From our experiment, we find that depositing double layers silicon nitride coating on mc-Si solar cells can get the optimal performance parameters. Open circuit (Voc) is 616 mV, short circuit current (Jsc) is 34.1 mA/cm2, and minority carrier diffusion length is 474.16 μm. The isotropic texturing and silicon nitride layers coating approach contribute to lowering cost and achieving high efficiency in mass production.

A Study on the Correlation Between the Grain Size and the Conversion Efficiency of Mc-Si Solar Cells

2012 ◽  
Vol 12 (7) ◽  
pp. 5691-5695 ◽  
Author(s):  
Myoung-Bok Lee ◽  
Kyu-Ho Song ◽  
Kwang-Mook Park ◽  
Ji-Hee Jung ◽  
So-Ik Bae
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Si Solar Cells

High Quality a-Si Films and Superlattice Structure p-Layer a-Si Solar Cells

1986 ◽  
Vol 70 ◽  
Author(s):  
Shoichi Nakano ◽  
Shinya Tsuda ◽  
Hisaki Tarui ◽  
Tsuyoshi Takahama ◽  
Hisao Haku ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Reaction Chamber ◽  
High Quality ◽  
Cvd Method ◽  
Superlattice Structure ◽  
Si Solar Cells ◽  
New Material ◽  
Si Films ◽  
First Time

ABSTRACTAs a new preparation method for high-quality a-Si films, we have developed the super chamber, a separated UHV reaction chamber system. A low impurity concentration and excellent film properties were obtained by the super chamber. A conversion efficiency of 11.7% was obtained for an a-Si solar cell using a high-quality i-layer deposited by the super chamber, and a p-layer fabricated by a photo-CVD method.As a new material, amorphous superlattice structure films were fabricated by the photo-CVD method for the first time. Quantization effects and low damage to the interfaces were observed. Superlattice structure p-layer a-Si solar cells were fabricated for the first time, and a conversion efficiency of 10.5% was obtained.

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