61 citations · 229 across the 14 of their papers we have counts for
6 papers · 1 filter
On the origin of tail states and VOC losses in Cu(In,Ga)Se2
Omar Ramírez, Jiro Nishinaga, Felix Dingwell +5
The detrimental effect of tail states on the radiative and non-radiative voltage loss has been demonstrated to be a limiting factor for the open circuit voltage in Cu(In,Ga)Se2 sol…
How much gallium do we need for a p-type Cu(In,Ga)Se2?
Omar Ramírez, Evandro Martin Lanzoni, Ricardo G. Poeira +4
Doping in the chalcopyrite Cu(In,Ga)Se2 is determined by intrinsic point defects. In the ternary CuInSe2, both N-type and P-type conductivity can be obtained depending on the growt…
Metastable defects decrease the fill factor of solar cells
Thomas Paul Weiss, Omar Ramírez, Stefan Paetel +4
Cu(In,Ga)Se2 based solar cells exceed power conversion efficiencies of 23 %. Yet, the fill factor of these solar cells, with best values around 80 %, is relatively low (Si reaches…
Post-deposition annealing and interfacial ALD buffer layers of SbSe/CdS stacks for reduced interface recombination and increased open-circuit voltages
Thomas Paul Weiss, Ignacio Minguez-Bacho, Elena Zuccalà +8
Currently, SbSe thin films receive considerable research interest as a solar cell absorber material. When completed into a device stack, the major bottleneck for further de…
Solar cell efficiency, diode factor and interface recombination: insights from photoluminescence
T. Wang, F. Ehre, T. P. Weiss +6
Metastable defects can decisively influence the diode factor and thus the efficiency of a solar cell. The diode factor is also influenced by the doping level and the recombination…
Electrical barriers and their elimination by tuning (Zn,Mg)O composition in Cu(In,Ga)S2: Systematic approach to achieve over 14% power conversion efficiency
Mohit Sood, Poorani Gnanasambandan, Damilola Adeleye +4
Traditional CdS buffer layer in selenium-free Cu(In,Ga)S2 solar cells leads to reduced open-circuit voltage because of a negative conduction band offset at the Cu(In,Ga)S2/CdS inte…