Unknown

Dataset Information

0

Thermal Stability of Hole-Selective Tungsten Oxide: In Situ Transmission Electron Microscopy Study.


ABSTRACT: In this study, the thermal stability of a contact structure featuring hole-selective tungsten oxide (WOx) and aluminum deposited onto p-type crystalline silicon (c-Si/WOx/Al) was investigated using a combination of transmission line measurements (TLM) and in situ transmission electron microscopy (TEM) studies. The TEM images provide insight into why the charge carrier transport and recombination characteristics change as a function of temperature, particularly as the samples are annealed at temperatures above 500?°C. In the as-deposited state, a???2?nm silicon oxide (SiOx) interlayer forms at the c-Si/WOx interface and a???2-3?nm aluminum oxide (AlOx) interlayer at the WOx/Al interface. When annealing above 500?°C, Al diffusion begins, and above 600?°C complete intermixing of the SiOx, WOx, AlOx and Al layers occurs. This results in a large drop in the contact resistivity, but is the likely reason surface recombination increases at these high temperatures, since a c-Si/Al contact is basically being formed. This work provides some fundamental insight that can help in the development of WOx films as hole-selective rear contacts for p-type solar cells. Furthermore, this study demonstrates that in situ TEM can provide valuable information about thermal stability of transition metal oxides functioning as carrier-selective contacts in silicon solar cells.

SUBMITTER: Ali H 

PROVIDER: S-EPMC6107557 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

altmetric image

Publications

Thermal Stability of Hole-Selective Tungsten Oxide: In Situ Transmission Electron Microscopy Study.

Ali Haider H   Koul Supriya S   Gregory Geoffrey G   Bullock James J   Javey Ali A   Kushima Akihiro A   Davis Kristopher O KO  

Scientific reports 20180823 1


In this study, the thermal stability of a contact structure featuring hole-selective tungsten oxide (WO<sub>x</sub>) and aluminum deposited onto p-type crystalline silicon (c-Si/WO<sub>x</sub>/Al) was investigated using a combination of transmission line measurements (TLM) and in situ transmission electron microscopy (TEM) studies. The TEM images provide insight into why the charge carrier transport and recombination characteristics change as a function of temperature, particularly as the sample  ...[more]

Similar Datasets

| S-EPMC3182121 | biostudies-literature
| S-EPMC4865808 | biostudies-other
| S-EPMC4850503 | biostudies-literature
| S-EPMC10186331 | biostudies-literature
| S-EPMC4793220 | biostudies-literature
| S-EPMC3162246 | biostudies-literature
| S-EPMC4726356 | biostudies-literature
| S-EPMC6509643 | biostudies-literature
| S-EPMC9419575 | biostudies-literature
| S-EPMC10693604 | biostudies-literature