University of Twente Student Theses
Analysing the Effect of High-level Irradiation on Contact Resistance in Solar Cells
Nijland, Chiel (2024) Analysing the Effect of High-level Irradiation on Contact Resistance in Solar Cells.
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| Full Text Status: | Access to this publication is restricted |
| Embargo date: | 30 August 2027 |
| Abstract: | While measurements on contact resistance are well understood, they are mostly performed in darkness. New developments of solar cell structures have raised the belief that light will have a significant influence on contact resistance in these new structures, especially when there occur high injection effects in the cells. This work investigates the effect of light on contact resistance for differently doped solar cells, especially under high injection conditions, by means of theory and finite element modelling simulations. The light intensity sweeps that are performed are 0–100% of one sun linearly and 1–100,000% of one sun logarithmically. The solar cell that will be simulated has a simple structure with an aluminium back surface plate, a p-type bulk and an n+-type top layer. A small aluminium front contact is placed on top. The cell will have n+ doping densities equal to: 1e12, 1e13, 1e14, 1e15 and 1e18 /cm3 with a constant p-doping of 1e14 /cm3. The contact resistance simulations are simulation by transfer length method simulations and the contact resistance is also evaluated by a method in which the device potential and current is used. The results allow for interesting conclusions, as the two simulation methods provided contradicting results. While the transfer length method simulation provided results in line with theory and previous measurements, it did not show a great dependency of contact resistance on light intensity, a maximum of 0.1757%. The device potential and current simulation method showed a great dependency of max 58.12% of contact resistance on light intensity, but it lacked the conformity with theory. The main takeaway should be that, while there are some promising results, a more detailed investigation on this topic in simulation software packages should be conducted, as the results of this research lack validity. |
| Item Type: | Essay (Bachelor) |
| Faculty: | EEMCS: Electrical Engineering, Mathematics and Computer Science |
| Subject: | 33 physics, 51 materials science |
| Programme: | Electrical Engineering BSc (56953) |
| Link to this item: | https://purl.utwente.nl/essays/103507 |
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