%0 Journal Article
%A Eberst, Alexander
%A Xu, Binbin
%A Bittkau, Karsten
%A Lambertz, Andreas
%A Rau, Uwe
%A Ding, Kaining
%T Performance improvements through gradient layers in transparent passivating contact solar cells
%J Cell reports / Physical science
%V 6
%@ 2666-3864
%C Maryland Heights, MO
%I Cell Press
%M FZJ-2025-02809
%P 102658
%D 2025
%X Transparent passivating contact solar cells using hydrogenated n-type nanocrystalline silicon carbide (nc-SiC:H(n)) utilize a double-layer stack consisting of one passivation-optimized and one conduction-optimized nc-SiC:H(n) layer. This double-layer configuration limits the fill factor (FF) due to the passivating layer’s low electrical conductivity. This study enhances this structure by introducing a gradient layer that transitions from passivating-like to conducting-like properties. While replacing the passivating layer alone does not improve performance, when combining it with an ultrathin passivating seed layer, the gradient layer effectively balances voltage and FF trade-offs. This results in higher device voltage and FF. Microstructural analysis shows hydrogen content near the crystalline Si interface similar to the double-layer approach but with increased electrical conductivity earlier in the layer stack. These improvements boost both FF and open-circuit voltage by 0.6% absolute and over 4 mV, respectively.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001540265100001
%R 10.1016/j.xcrp.2025.102658
%U https://juser.fz-juelich.de/record/1043283