Towards an optimized emitter for screen-printed solar cells

2013 IEEE 39th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-06-16 DOI:10.1109/PVSC-VOL2.2013.7179243

A. Dastgheib-Shirazi, G. Micard, H. Wagner, M. Steyer, P. Altermatt, G. Hahn

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引用次数: 3

Abstract

The determination of suitable process parameters for POCl3 diffusion, with the aim of minimizing emitter recombination and obtaining satisfactory contactability of the homogeneous emitter, is the aim of this study. It can be shown that different emitters with low Rsheet<; 60 Ω/sq can result in significantly different emitter saturation current densities. Regarding the screen-printing metallization procedure, we observe that the resistance of a semiconductor-metal contact can vary on different emitters despite of the same sheet resistance. In this study, the relevant process parameters for emitter optimization using POCl3-diffusion were determined with the help of a design of experiment (DoE). Thus, it is also possible to find optimized diffusion parameters without increasing the sheet resistance of the optimized emitter. To verify the efficiency potential of the emitter, a standard industrial solar cell process is applied, and the outcome is compared with results from simulations using Sentaurus Device. A significant increase in efficiency can be reached, with open circuit voltages >640 mV and average efficiencies well above 19%.

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面向丝网印刷太阳能电池的优化发射器

本研究的目的是确定合适的POCl3扩散工艺参数，以减少发射极复合并获得满意的均匀发射极接触性。结果表明，低Rsheet640 mV和平均效率远高于19%的不同发射体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2013 IEEE 39th Photovoltaic Specialists Conference (PVSC) PART 2

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