摘要
采用磷硼共扩散的方法制备了N型高效双面电池,通过优化背场及发射极扩散工艺,研究了扩散工艺曲线对电池电性能参数的影响机理。实验结果表明,降低背场扩散方块电阻可提高电池填充因子,同时造成开路电压(V_(oc))和短路电流(I_(sc))降低,需要在背场饱和电流密度(J_(0BSF))和填充因子(FF)之间找到一个平衡点;降低发射极表面杂质浓度和方块电阻并适当的增加结深,可改善与金属化栅线的接触。正面采用低浓度深结扩散工艺可改善V_(oc)和FF,减少复合,提高Isc,电池效率增加了0.2%,平均效率达到20.41%。
N-type high-efficiency bifacial solar cells were fabricated by co-diffusing phosphorous and boron.The effect of the diffusion on the electrical performance was investigated by optimizing the emitter and the back surface field（BSF）.The results showed that fill factor（FF）increased,while the open-circuit voltage（Voc）and the short-circuit current（Isc）decreased as a result of the decrease of sheet resistance of BSF.There was a balance between BSF saturation current density（J0BSF）and FF.The contact of metallization was improved by decreasing emitter peak concentration and sheet resistance with a suitable deeper junction.Lower peak concentration with deeper junction could improve Voc,FFand Isc.The cells′efficiency increases 0.2%,and the average efficiency could reach 20.41%.
出处
《光电子技术》
CAS
2017年第2期124-128,共5页
Optoelectronic Technology
基金
青海省科技厅企业研究转化与产业化专项(2016-GX-C13)
关键词
N型
硼扩散
掺杂浓度
P-N结
电池效率
N-type
boron diffusion
doping concentration
p-n junction
cell efficiency
