1. 22.5% efficient silicon heterojunction solar cell with molybdenum oxide hole collector.
- Author
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Geissbühler, Jonas, Werner, Jérémie, de Nicolas, Silvia Martin, Barraud, Loris, Hessler-Wyser, Aïcha, Despeisse, Matthieu, Nicolay, Sylvain, Tomasi, Andrea, Niesen, Bjoern, De Wolf, Stefaan, and Ballif, Christophe
- Subjects
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SILICON solar cells , *HETEROJUNCTIONS , *MOLYBDENUM oxides , *SOLAR collectors , *LIGHT absorption , *TRANSITION metal oxides , *WIDE gap semiconductors - Abstract
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°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%. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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