| Study the Effect of Fabrication Processes on the Efficiency of Monocrystalline Silicon Solar Cell in Egypt- China Laboratory |
| Paper ID : 1171-ICRSSSA |
| Authors |
|
Shymaa Sabry Elfiky *1, Mohamed Bayoumy Zahran2, Ahmed Elsayed Farghal3, Ahmed Mohamed Kassem3, Aref Youssef Eliwa4 1Joint National Egyptian-Chinese Renewable Energy laboratory, Sohag, Egypt 2National Authority of Remote Sensing and Space Science "NARSS", Cairo, Egypt 3Department of Electrical Engineering, Faculty of Engineering, Sohag University, Sohag 82524, Egypt. 45 Photovoltaic Cells Department, Electronics Research Institute, Cairo, Egypt6 Electrical Engineering Department, Faculty of Engineering, October 6 University, Egypt |
| Abstract |
| We study the effect of each manufacturing process on performance of monocrystalline silicon (monoSi) solar cell . For manufacturing monocrystalline solar cell; various number of processing steps were implemented to reach the final solar cell. Firstly, apseudo-square -type 〈100 〉 oriented Czochralski mono-Si wafer with area of and thickness of 180µm is used. Cleaning and texturing the wafer was carried out using KOH and IPA. Next, liquid Phosphorus Oxy chloride (POCl3) was used to form junction using diffusion process. Carbon tetra fluoride (CF4) and (O2) were used to isolate the edges using plasma etching technique. Phosphorus silicate glass (PSG) removal process was carried to remove PSG layer from the surface of the cell. To improve the efficiency, antireflection layer of silicon nitride (is deposited on the surface to reduce the reflection and thus improve the efficiency. Screen-printing technique was used to perform back and front side metallization using aluminum and silver paste, respectively. Next, curing the ohmic contact is performed using rapid thermal annealing at high zone temperature. Finally, the efficiency and all I-V parameters; Voc, Isc, FF Rsh and Rs of solar cells was measured using IV tester. Efficiency up to (18.34% -18.66%) was achieved. This is a high efficiency considering that This is the first time in Egypt to fabricate mono-Si solar cell. |
| Keywords |
| monocrystalline silicon cell, phosphorus Diffusion, screen printing, texturing, LIV tester |
| Status: Accepted (Oral Presentation) |
