Novel Approach of Multicrystalline Silicon Texturing for Large Area Commercial Solar Cell of Low Cost and High Efficiency

Suresh Kumar Dhungel ,  Kyunghae Kim ,  Jinsoo Yoo ,  Hwang Sunwoo ,  Bojan Karunagaran ,  Devanesan Mangalaraj ,  Junsin Yi 

Sungkyunkwan University, School of Information and Communication Engineering, 300 Chunchun-dong, Jangan-gu, Suwon 440746, Korea, South

Abstract

Multicrystalline silicon wafers were textured in an alkaline bath, basically using NaOH and in acidic bath, using mainly HF, HNO3 , De-ionized water, Na2 PO4 and H3PO4 in different composition ratio and treatment time. Comparison of average reflectance of the treated samples for the range of 400 nm to 1100 nm wavelength of light showed low reflectance value (< 5 %) for the acid textured sample in the optimized condition. The solar cells were thus fabricated with the samples following the main steps such as Phosphorus doping for emitter layer formation, PECVD Silicon Nitride deposition for anti-reflection coating and front surface passivation , Screen Printing metallization, RTP co-firing and Laser edge isolation and confirmed 14 % conversion efficiency from the best textured samples. This isotropic acid texturing approach can be instrumental to replace conventional alkaline texturing approach for the mass production of low cost and efficient solar cell with the multicrystalline silicon as the starting material.


 

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Presentation: oral at E-MRS Fall Meeting 2004, Symposium A, by Suresh Kumar Dhungel
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-04-30 10:46
Revised:   2009-06-08 12:55