perc电池制程详解-尊龙凯时官网

2019-08-17 12:36



  原理:一定浓度、一定温度条件下,碱溶液与硅片反应,各向异性腐蚀;
  principle:etching silicon in anisotropic koh solution;
  目的:去除表面损伤层,降低表面反射率;
  purpose:saw damage remove and reduce surface reflection;
  化学反应式(chemical equation):si 2koh h2o → k2sio3 2h2↑
  绒面结构(surface structure)



  原理:采用三氯氧磷(pocl3)液态源扩散方法,在硅片表面形成n型层;
  principle:pocl3  liquid diffusion, forming n type si on surface;
  目的:形成pn结(太阳电池核心单元);
  purpose: forming pn junction;
  化学反应式(chemical equation) :5pocl3→3pcl5 p2o5(high t)2p2o5 5si→5sio2 4p↓



  原理:采用激光,在硅片表面形成局域重掺杂n型层;
  principle:use laser to form heavy n type si (local) on surface;
  目的:形成局域重掺杂n型层;
  purpose: forming heavy n type si (local) on surface;



  原理:实现硅片的单面腐蚀;
  principle: single side etch of silicon wafer;
  目的:pn结边缘隔离和背面抛光;
  purpose: isolation of pn junction and polishing.
  化学反应式(chemical equation) :si 4hno3 → sio2 4no2↑ 2h2o    sio2 4hf → sif4↑ 2h2o    sif4 2hf → h2sif6




  原理:在表面生长sio2钝化膜;
  principle:grow  sio2 film on surface;
  目的:提升开路电压,提升效率。
  purpose: increase voc, improve efficiency.
  化学反应式(chemical equation) :
  si o2 → sio2



  原理:pecvd沉积alox sinx薄膜;
  principle: pecvd deposition of alox sinx thin film;
  目的:制备背面钝化介质层;
  purpose: rear side alox/sinx dielectric layer. 
  工艺流程(process  flow):



  pecvd/arc原理:pecvd沉积sinx减反射膜;
  principle: pecvd deposition of anti-reflective coating;
  目的:表面钝化和降低反射率;
  purpose: surface passivation and reduce reflection.





  原理:激光消融背面介质层;
  principle: laser ablation of dielectric layer;
  目的:形成局域背场接触,收集电流;
  purpose:forming local bsf(back surface filed) to collect current.




  丝网印刷&烧结(screen printing& co-firing):
  perc电池需使用专用银铝浆料,使电池性能达到最优。
  perc cell use special ag&al paste,for optimum of cell performance.



  原理:
  principle:
  目的:降低光衰减;
  purpose:decrease lid.

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