Area of research
Electrical and Electronic Engineering · Materials Chemistry
Research interest
Research topics from publications: Ge‐Doped CZTSe Solar Cell Efficiency Beyond 14% by Suppressing Recombination. Representative work: Abstract Recombination is one of the main factors that cause the large open‐circuit voltage deficit ( V oc , def ) in Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells. To mitigate this issue, an effective strategy is developed to suppress the recombinations in CZTSe devices by doping Ge in the absorber. A certified efficiency of 14.67%(total area: 0.3143 cm 2 , without an anti‐reflective layer) was achieved in optimally Ge‐doped CZTSe solar cells. In addition to promoting the grain growth, Ge doping induces more pronounced downward band‐bending, effectively passivating GBs and suppressing recombination in the quasi neutral region (QNR). While optimal Ge doping reduces the number of Cu Zn defects, exce