Fabrication of low cost nano-grass n-type C-Si solar cell with sol–gel Al2O3 passivation

In this study, the contact mechanism between Ag–Al and Si and the change in contact resistance (Rc) were analyzed by varying the firing profile. The front electrode of an n-type c-Si solar cell was formed through a screen-printing process using Ag–Al paste. Rc was measured by varying the belt speed and peak temperature of the fast-firing furnace. Rc value of 6.98 mΩ-cm−2 was obtained for an optimal fast-firing profile with 865 °C peak temperature and 110 inches per min belt speed. The contact phenomenon and the influence of impurities between the front-electrode–Si interface and firing conditions were analyzed through scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The EDS analysis revealed that the peak firing temperature at 865 °C exhibited a low atomic weight percentage of Al (0.72 and 0.36%) because Al was involved in the formation of alloy of Si with the front electrode. Based on the optimal results, a solar cell with a conversion efficiency of 19.46% was obtained.

Download Full-text

Nickel assisted chemical etching for multi-crystalline Si solar cell texturing: a low cost single step alternative to existing methods

Materials Research Express ◽

10.1088/2053-1591/aaceec ◽

2018 ◽

Vol 5 (7) ◽

pp. 075506 ◽

Cited By ~ 1

Author(s):

Ashkan Vakilipour Takaloo ◽

Fırat Es ◽

Gülsen Baytemir ◽

Raşit Turan

Keyword(s):

Solar Cell ◽

Chemical Etching ◽

Low Cost ◽

Single Step ◽

Si Solar Cell

Download Full-text

Fabrication of Dye Sensitized Solar Cell Based on TiO2 Nanoparticles and Chlorophyll from Pandan Leaf as Active Layer

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.545.405 ◽

2012 ◽

Vol 545 ◽

pp. 405-409 ◽

Cited By ~ 2

Author(s):

Nurul Huda Yusoff ◽

Mohamad Firdaus Rosle ◽

Surani Buniran

Keyword(s):

Solar Cells ◽

Solar Cell ◽

Active Layer ◽

Low Cost ◽

Sol Gel ◽

Dye Sensitized Solar Cells ◽

Electrical Current ◽

Dip Coating ◽

Dye Sensitized Solar Cell ◽

Dye Sensitized

Dye sensitized solar cell (DSSC) is a new class of low-cost solar cell, that belongs to third generation solar cells in thin film based. It is based on a semiconductor formed between a photo-sensitized anode and an electrolyte, known as photoelectrochemical system. A lot of research has been conducted due to their interesting potential for low-cost, lightweight, disposable and having cell efficiency up to 10%. This paper reports the fabrication of dye sensitized solar cells using TiO2 nanoparticles and chlorophyll as active layer. TiO2 nanoparticles were prepared by sol-gel method while the chlorophyll was extracted from Pandanus amaryllifolius (Pandan leaf). TiO2 film was prepared on ITO coated glass using dip coating technique and then immersed overnight in the chlorophyll solution. An electrolyte solution composed of PC-LiClO4 was injected into the cell before sealed using glass that was coated with Pt as top electrode. An active area of 4.48 cm2 was fabricated by black masking the front side. The performance of the device was studied by observing the current-voltage characteristics of the device in dark at ambient temperature and under illumination of 100 mW/cm2 light. It was found that the device showed rectifier property in the dark and able to generate electrical current under light.

Download Full-text

Omnidirectional and Broadband Antireflection Effect with Tapered Silicon Nanostructures Fabricated with Low-Cost and Large-Area Capable Nanosphere Lithography

Micromachines ◽

10.3390/mi12020119 ◽

2021 ◽

Vol 12 (2) ◽

pp. 119

Author(s):

Sangho Kim ◽

Gwan Seung Jeong ◽

Na Yeon Park ◽

Jea-Young Choi

Keyword(s):

Solar Cell ◽

High Efficiency ◽

Computational Study ◽

Low Cost ◽

Dimethyl Formamide ◽

Large Area ◽

Solar Cell Application ◽

Si Solar Cell ◽

Coating Method ◽

Broadband Antireflection

In this report, we present a process for the fabrication and tapering of a silicon (Si) nanopillar (NP) array on a large Si surface area wafer (2-inch diameter) to provide enhanced light harvesting for Si solar cell application. From our N,N-dimethyl-formamide (DMF) solvent-controlled spin-coating method, silica nanosphere (SNS in 310 nm diameter) coating on the Si surface was demonstrated successfully with improved monolayer coverage (>95%) and uniformity. After combining this method with a reactive ion etching (RIE) technique, a high-density Si NP array was produced, and we revealed that controlled tapering of Si NPs could be achieved after introducing a two-step RIE process using (1) CHF3/Ar gases for SNS selective etching over Si and (2) Cl2 gas for Si vertical etching. From our experimental and computational study, we show that an effectively tapered Si NP (i.e., an Si nanotip (NT)) structure could offer a highly effective omnidirectional and broadband antireflection effect for high-efficiency Si solar cell application.

Download Full-text