TY  - JOUR
AU  - Duan, Weiyuan
AU  - Lambertz, Andreas
AU  - Bittkau, Karsten
AU  - Qiu, Depeng
AU  - Qiu, Kaifu
AU  - Rau, Uwe
AU  - Ding, Kaining
TI  - A route towards high‐efficiency silicon heterojunction solar cells
JO  - Progress in photovoltaics
VL  - 30
IS  - 4
SN  - 1062-7995
CY  - Chichester
PB  - Wiley
M1  - FZJ-2022-01762
SP  - 384 - 392
PY  - 2022
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000716697900001
DO  - DOI:10.1002/pip.3493
UR  - https://juser.fz-juelich.de/record/906937
ER  -