| Enhancement the efficiency of monocrystalline silicon solar cell depending on reduction optical losses on the surface of the cell |
| Paper ID : 1186-ICRSSSA |
| Authors |
|
Shymaa Sabry Elfiky *1, Mohamed Zahran2, Mai Allam3, Ahmed Mohamed Kassem4, Aref Youssef Eliwa5, Ahmed Elsayed Farghal6, Ninet Ahmed7 1Joint National Egyptian-Chinese Renewable Energy laboratory, Sohag, Egypt 2National Authority of Remote Sensing and Space Science “NARSS”, Cairo, Egypt 3National Research Center Academy of Scientific Research and Technology, Cairo, Egypt 4Department of Electrical Engineering, Faculty of Engineering, Sohag University, Sohag 82524, Egypt. 5Electronics Research Institute 6Department of Electrical Engineering, Faculty of Engineering, Sohag University, Sohag 82524, Egypt. 75Photovoltaic Cells Department, Electronics Research Institute, Cairo, Egypt |
| Abstract |
| The aim of this work is to reduce the optical losses and improve the monocrystalline silicon solar cell efficiency. In this work, reducing optical losses on the surface of the cell was achieved by forming pyramids randomly on the cell surface and by depositing Si3 N4 anti-reflection coating (ARC). Pyramids on the surface was performed by a wet-chemical texturing process using alkaline etching mixture of (KOH) and IPA at different time of etching. The Si3N4 layer is deposited on the surface of the solar cell as a result of ammonia (NH3) and pure silane (SiH4) reaction in plasma-enhanced chemical vapour deposition (PECVD) equipment at different deposition time The size of the pyramids was varied from no-pyramids to small pyramids, medium pyramids and large pyramids . Si3 N4 layer thickness was in the range of 68-102 nm. The effect of the pyramids size and the thickness of Si3 N4 layer on the Efficiency of the solar cell were investigated. It is found that, the highest solar cell short circuit current of 8.9 A and the highest efficiency of 18.55% was realized at medium size pyramids and at the thickness of Si3 N4 85nm that texturing process reduce the reflection from 35% to 10% , Anti-Reflection coating reduce the reflection from 10% to 2% . This study was carried out in the Joint National Egyptian-Chinese Renewable Energy laboratory, Sohag, Egypt. |
| Keywords |
| momocrystalline solar cell –antireflection coating –texturing-pyramids size -optical losses |
| Status: Accepted (Oral Presentation) |
