Title :
Gettering in multicrystalline silicon-a design-of-experiments approach
Author_Institution :
Photovoltaic Syst. Components Dept., Sandia Nat. Labs., Albuquerque, NM, USA
Abstract :
Statistical methods were used to design and analyze the results of a gettering experiment on four industrial multicrystalline silicon solar cell materials. The experiment studied the effects of temperature and time in the POCl3 diffusion process and the aluminum alloy process using simple diagnostic devices. The time and temperature ranges were restricted to maintain compatibility with commercial fabrication sequences. The design was capable of picking up second order interactions between the various processing factors. Statistically significant gettering effects were detected in only two of the four materials. The results for one of these materials were further tested using full solar cells. Strengths and weaknesses of this approach to gettering studies have become apparent in the present work and are discussed
Keywords :
design of experiments; diffusion; elemental semiconductors; getters; semiconductor materials; silicon; solar cells; statistical analysis; POCl3; POCl3 diffusion process; Si; aluminum alloy process; design-of-experiments approach; gettering; multicrystalline Si; second order interactions; solar cell materials; statistical methods; Alloying; Aluminum alloys; Crystalline materials; Fabrication; Gettering; Laboratories; Photovoltaic cells; Photovoltaic systems; Silicon; Temperature;
Conference_Titel :
Photovoltaic Energy Conversion, 1994., Conference Record of the Twenty Fourth. IEEE Photovoltaic Specialists Conference - 1994, 1994 IEEE First World Conference on
Conference_Location :
Waikoloa, HI
Print_ISBN :
0-7803-1460-3
DOI :
10.1109/WCPEC.1994.520521
