Title:	Understanding the Impact of Boron Diffusion on n-Type Silicon Bifacial Solar Cells
Author(s):	S. Simayi, Y. Kida, K. Shirasawa, H. Takato
Keywords:	Bifacial Solar Cells, Boron Diffusion, Saturation Current
Topic:	WAFER-BASED SILICON SOLAR CELLS AND MATERIALS TECHNOLOGY
Subtopic:	Silicon Solar Cell Improvements
Event:	31st European Photovoltaic Solar Energy Conference and Exhibition
Session:	2CV.4.14
Pages:	947 - 949
ISBN:	3-936338-39-6
Paper DOI:	10.4229/EUPVSEC20152015-2CV.4.14
Price:	0,00 EUR
Document(s):	paper

Abstract/Summary:

---

In this work, we fabricated an n-type bifacial solar and spectral characterization have been investigated for this cell and a loss has been observed on the short wavelength. This paper mainly demonstrates increase cell efficiency by optimizing the p+ emitter with a thermal grown SiO2 as well as PECVD SiNx passivation layer. P+ emitter was formed by BBr3 diffusion. Emitter sheet resistance have been optimized by modifying the BBr3 diffusion temperature. Sheet resistance ranges from 49Ω/Sq to 173Ω/Sq, diffusion depth ranges from 0.4 um to 0.8 um. By optimizing the front side emitter an improvement has been observed for short wavelength and increases the front side efficiency by 0.4%.