Precipitation of iron in multicrystalline silicon during annealing
نویسندگان
چکیده
منابع مشابه
Precipitation of interstitial iron in multicrystalline silicon
The internal gettering of iron in silicon via iron precipitation at low processing temperatures is known to improve solar cell efficiencies. Studies have found that the optimal temperature lies in the range of 500 o C-600 o C. In this paper, we present experimental results on quantitatively analysing the precipitation of interstitial Fe in multicrystalline silicon wafers during the 500 o C-600 ...
متن کاملStudying precipitation and dissolution of iron in multicrystalline silicon wafers during annealing
In this paper we study the changes in iron concentrations and distributions in multicrystalline silicon (mc-Si) wafers after annealing in the temperature range of 600-900 o C. The dissolved Fe distributions across mc-Si wafers are obtained by photoluminescence imaging taken before and after dissociation of FeB pairs. The results show that the precipitation of dissolved Fe, both near the grain b...
متن کاملBehaviour of Natural and Implanted Iron during Annealing of Multicrystalline Silicon Wafers
Changes in the concentration of interstitial iron in multicrystalline silicon wafers after high temperature annealing (900oC) have been monitored by carrier lifetime measurements. Two cooling rates were investigated. The first was considered ‘fast’, meaning the interstitial Fe had no time to diffuse to precipitation sites, and should therefore be frozen-in, despite being far above the solubilit...
متن کاملDissolution of metal precipitates in multicrystalline silicon during annealing and the protective effect of phosphorus emitters
The degradation of the carrier lifetime in multicrystalline silicon due to the dissolution of metal precipitates during high temperature annealing is well known. This letter presents evidence indicating that the presence of phosphorus emitters during annealing can help reduce this recontamination. Part of the degradation observed is due to increased interstitial iron concentrations caused by th...
متن کامل