References of "Weiss, Thomas P"
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See detailDifferent Bandgaps in Cu2ZnSnSe4: A High Temperature Coevaporation Study
Redinger, Alex UL; Sendler, Jan UL; Djemour, Rabie et al

in IEEE Journal of Photovoltaics (2015), 5(2), 641-648

We present a high-temperature Cu2ZnSnSe4 coevaporation study, where solar cells with a power conversion efficiency of 7.1 have been achieved. The process is monitored with laser light scattering in order ... [more ▼]

We present a high-temperature Cu2ZnSnSe4 coevaporation study, where solar cells with a power conversion efficiency of 7.1 have been achieved. The process is monitored with laser light scattering in order to follow the incorporation of the Sn into the film. We observe the segregation of ZnSe at the Mo/CZTSe interface. Optical analysis has been carried out with photoluminescence and spectrophotometry. We observe strong band tailing and a bandgap, which is significantly lower than in other reported efficient CZTSe absorbers. The photoluminescence at room temperature is lower than the bandgap due to the existence of a large quantity of tail states. Finally, we present effects of low-temperature postannealing of the absorbers on ordering of the Cu/Zn atoms in CZTSe and solar cell parameters. We observe strong changes in all solar cell parameters upon annealing. The efficiency of the annealed devices is significantly reduced, although ordering is improved compared with ones made from nonannealed absorbers. [less ▲]

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See detailCu-Rich Precursors Improve Kesterite Solar Cells
Mousel, Marina; Schwarz, Torsten; Djemour, Rabie et al

in ADVANCED ENERGY MATERIALS (2014), 4(2),

Detailed reference viewed: 117 (0 UL)