%0 Journal Article
%A Duan, Weiyuan
%A Lambertz, Andreas
%A Bittkau, Karsten
%A Qiu, Depeng
%A Qiu, Kaifu
%A Rau, Uwe
%A Ding, Kaining
%T A route towards high‐efficiency silicon heterojunction solar cells
%J Progress in photovoltaics
%V 30
%N 4
%@ 1062-7995
%C Chichester
%I Wiley
%M FZJ-2022-01762
%P 384 - 392
%D 2022
%X In this work, we propose a route to achieve a certified efficiency of up to 24.51% for silicon heterojunction (SHJ) solar cell on a full-size n-type M2 monocrystalline-silicon Cz wafer (total area, 244.53 cm2) by mainly improving the design of the hydrogenated intrinsic amorphous silicon (a-Si:H) on the rear side of the solar cell and the back reflector. A dense second intrinsic a-Si:H layer with an optimized thickness can improve the vertical carrier transport, resulting in an improved fill factor (FF). In order to reduce the plasmonic absorption at the back reflector, a low-refractive-index magnesium fluoride (MgF2) is deposited before the Ag layer; this leads to an improved gain of short circuit current density (Jsc). In total, together with MgF2 double antireflection coating and other fine optimizations during cell fabrication process, ~1% absolute efficiency enhancement is finally obtained. A detailed loss analysis based on Quokka3 simulation is presented to confirm the design principles, which also gives an outlook of how to improve the efficiency further.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000716697900001
%R 10.1002/pip.3493
%U https://juser.fz-juelich.de/record/906937