22.5% efficient silicon heterojunction solar cell with molybdenum oxide hole collector
Substituting the doped amorphous silicon films at the front of silicon heterojunction solar cells with wide-bandgap transition metal oxides can mitigate parasitic light absorption losses. This was recently proven by replacing p-type amorphous silicon with molybdenum oxide films. In this article, we evidence that annealing above 130 degrees C-often needed for the curing of printed metal contacts-detrimentally impacts hole collection of such devices. We circumvent this issue by using electrodeposited copper front metallization and demonstrate a silicon heterojunction solar cell with molybdenum oxide hole collector, featuring a fill factor value higher than 80% and certified energy conversion efficiency of 22.5%. (C) 2015 AIP Publishing LLC.
paper_824.pdf
Publisher's version
restricted
1.61 MB
Adobe PDF
eb1544ccc69bc831b26c622db4debea5