高效多晶铸锭的热场优化及其工艺改进
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摘要
针对ECM PV450炉型高效铸锭工艺电池转换效率偏低问题进行研究及实验,通过优化热场结构使侧部加热器与坩埚底部籽晶相对位置的变化,在纵向上提升侧部加热器高度、在横向上添加保温材料,使籽晶尽可能与加高温隔离;同时改进化料工艺适当增加顶部温度、降低侧部和底部熔化温度,在设备和工艺两方面最大限度的保护坩埚底部籽晶不被高温熔化,保证硅锭籽晶的完整性,消除了硅锭边角区域的效率短板,平均电池转换效率由18.33%提升至18.48%,大幅度提高了铸锭品质。
In the paper we do some researches and experiments on ECM PV450 to solve the problem of low conversion efficiency of solar cell. We change the distance between the side the heater and the seed at the bottom of the crucible,that enhance the side heater in the longitudinal direction and add thermal insulation material on the transverse;at the same time,we improve the process to increase the top melting temperature,and reduce the side and bottom melting temperature,to protect the seed at the bottom of the crucible from melting at high temperature as possible. In the two aspects of equipment and process,we get the perfect seed and eliminate the short board of battery conversion efficiency at corner of ingot. The average battery conversion efficiency is increased from 18.33% to 18.48%,that improved the quality of ingot casting greatly.
In the paper we do some researches and experiments on ECM PV450 to solve the problem of low conversion efficiency of solar cell. We change the distance between the side the heater and the seed at the bottom of the crucible,that enhance the side heater in the longitudinal direction and add thermal insulation material on the transverse;at the same time,we improve the process to increase the top melting temperature,and reduce the side and bottom melting temperature,to protect the seed at the bottom of the crucible from melting at high temperature as possible. In the two aspects of equipment and process,we get the perfect seed and eliminate the short board of battery conversion efficiency at corner of ingot. The average battery conversion efficiency is increased from 18.33% to 18.48%,that improved the quality of ingot casting greatly.
引文
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[11]唐中华,陈声斌,何鹏,等.多晶硅半熔铸锭工艺研究[J].科研,2016(1):198-199.
[2]孙晓佳.我国光伏行业多晶硅产业发展研究及对策建议[J].科技和产业,2011,11(5):23-25.
[3]刘超,黄杰.对多晶硅铸锭炉生产工艺控制技术的研究[J].科技创新与应用,2012(26):137-137.
[4]王锋,张桂芸,周社柱.多晶硅铸锭工艺的优化与分析[J].电子工业专用设备,2015,44(7):11-12.
[5]兰洵,吴昕,林洪峰.多晶硅大规模铸锭的工艺技术[J].铸造技术,2015(11):2686-2689.
[6]权祥,焦富强,邓敏,等.不同籽晶对多晶硅晶体生长的影响[J].人工晶体学报,2014(10):2743-2746.
[7]吴小元.硅晶体凝固生长及位错形核的分子动力学模拟研究[D].南昌:南昌大学,2015.
[8]丁常林.有籽晶晶硅铸锭的计算模拟研究及应用[D].南京:南京工业大学,2014.
[9]赵志敏.热场改造对多晶硅性能的影响[D].南昌:南昌航空大学,2014.
[10]戚凤鸣,张兆玉,钟根香,等.籽晶粒径分布对高效多晶硅晶体生长的影响[J].材料导报,2015(24):54-58.
[11]唐中华,陈声斌,何鹏,等.多晶硅半熔铸锭工艺研究[J].科研,2016(1):198-199.