摘要
针对P型钝化发射极背面接触(PERC)太阳能电池在服役期间受到电势衰退和湿热诱导衰退影响而引起光电转换效率降低的问题,本文通过光电注入和热退火工艺对已衰退电池进行修复并研究其增效机制。实验结果表明:在光照强度为3倍标准太阳光、电注入电流为10 A、退火温度为150℃、工艺50 min实验条件下,对180片已衰退电池进行修复实验,其中94.32%的已衰退电池的光电转换效率得到修复,实验后电池光电转换效率平均提升8.96%。光致发光光谱和量子效率分析表明,光电注入和热退火工艺可有效减少电池因电势诱导衰退和湿热衰退形成的内部缺陷和背表面缺陷,提升衰退电池片的光电转换效率。
In view of the problem that the photoelectric conversion efficiency of P-type passivated emitter rear contact(PERC)solar cells reduces due to the influence of potential induced degradation and damp-heat degradation during the service period,the degraded solar cells were recovered by photo&electric injection and thermal annealing process.In the meantime,the efficiency improvement mechanism was studied.The experimental results show that 94.32%of degraded solar cells are recovered successfully,and the average photoelectric conversion efficiency of all investigated cells is increased by 8.96%,under the optimal experimental conditions of 3 times standard sunlight intensity,10 A of electric injection current,150℃of annealing temperature,and 50 min of processing.The results of photoluminescence spectra and quantum efficiency show that the photoelectric injection and thermal annealing can effectively reduce the internal and rear surface defects of silicon substrate caused by potential induced degradation and damp-heat degradation,and the photoelectric conversion efficiency of degraded solar cells can be finally improved.
作者
洪伦
杜汇伟
李明远
王疆瑛
张景基
宗泉
张昕宇
张彼克
金井升
HONG Lun;DU Huiwei;LI Mingyuan;WANG Jiangying;ZHANG Jingji;ZONG Quan;ZHANG Xinyu;ZHANG Bike;JIN Jingsheng(College of Materials and Chemistry,China Jiliang University,Hangzhou 310018,China;Jingko Solar Co.,Ltd.,Shangrao 333100,China)
出处
《人工晶体学报》
CAS
北大核心
2022年第8期1378-1386,共9页
Journal of Synthetic Crystals
基金
国家重点研发计划(2018YFB1500603)
浙江省基础公益研究计划(LQ20E070003)。
关键词
光电注入
P-PERC太阳能电池
氢钝化
转换效率
性能衰退
电势诱导衰退
湿热衰退
photo&electric injection
P-PERC solar cell
hydrogen passivation
conversion efficiency
performance degradation
potential induced degradation
damp-heat degradation
