With a global market share of about 90%, crystalline silicon is by far the most important photovoltaic technology today. Our main research interest is on novel selective contact schemes for silicon photovoltaics, in particular passivated oxide contacts proposed by C. Battaglia in 2014.

Fig. 1: a) Schematic of the components of a generalized silicon heterojunction cell. b) Scanning electron microscopy cross section of a silicon heterojunction solar cell with an intrinsic hydrogenated amorphous silicon passivation layer, molybdenum oxide hole selective contact, and hydrogenated indium oxide transparent front electrode.

Selected publications:

[1] C. Battaglia, A. Cuevas, S. De Wolf, High-efficiency crystalline silicon solar cells: status and perspectives, Energy Environ. Science, 9, 2016, 1552.

[2] J. Bullock, A. Cuevas, C. Battaglia, Molbydenum oxide MoOx: a versatile hole contact for silicon solar cells, Appl. Phys. Lett. 105, 2014, 232109.

[3] C. Battaglia, S. M. De Nicolas, S. De Wolf, X. Yin, M. Zheng, C. Ballif, A. Javey, Silicon heterojunction solar cell with passivated hole selective MoOx contact, Appl. Phys. Lett. 104, 2014, 113902.

[4] C. Battaglia, X. Yin, M. Zheng, I. D. Sharp, T. Chen. S. McDonnell, A. Azcatl, C. Carraro, B. Ma, R. Maboudian, R. M. Wallace, A. Javey, Hole selective MoOx contact for silicon solar cells, Nano Lett. 14, 2014, 967.