Rear surface passivation in buried contact solar cells
- Univ. of New South Wales, Sydney, New South Wales (Australia). Photovoltaic Special Research Centre
A range of rear surface structures have been developed and studied for the purpose of improving the performance of buried contact solar cells (BCSC). In particular, improved results are reported for the double grooved BCSC with oxidized p-type rear surface, with V{sub oc} of 685 mV having been demonstrated. The importance of including an alneal treatment is clearly evident with open circuit voltages typically degrading 60 mV without its inclusion. Devices with the same structure but with a rear floating junction are also evaluated within the study and again the dependence on an alneal is evident for cells with low surface phosphorus concentration. In the highest voltage devices, the rear boron diffused grooves contribute almost 30% of the total device dark saturation current, with test devices achieving V{sub oc} as high as 694 mV for a BCSC with the rear grooves replaced by photolithographically defined boron diffused contact regions.
- Sponsoring Organization:
- Australian Research Council, Canberra, ACT (Australia)
- OSTI ID:
- 302482
- Report Number(s):
- CONF-970953--
- Country of Publication:
- United States
- Language:
- English
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