This brief models the junction discontinuities of a rear Al-doped p+ emitter (np+) formed by screen printing and firing. Theoretical fitting of the suns-V oc data to the circuit model shows that not only do the junction discontinuities deteriorate cell V oc, for the case of p-type cells, but they also reduce cell fill factor on n-type cells through increased junction recombination and nonlinear shunts.
Published in:
Electron Devices, IEEE Transactions on
(Volume:57
,
Issue:
2
)
Date of Publication: Feb. 2010