Bifacial solar cells can be optimized to have equal efficiency on the front and back sides or separately optimized sides. Researchers must determine the best research and development strategy. There is also a need for a new standard method to measure the current-voltage characteristics of bifacial cells that accounts for factors like albedo, photon flux, and installation scenarios. Defining the efficiency of bifacial cells requires considering physics, economic, and performance factors.

1. Bifacial Solar Cells
Discussion Cells and Modules
Questions:
• What is better for application of bifacial cells: ηηηηRS/ηηηηFS=1 or separately optimized
sides? Which strategy to follow in R&D?
• How urgent is a new way of IV „standard“ measurement of bifacial cells?
• How would it look like in calibration lab and/or institutes/companies?• How would it look like in calibration lab and/or institutes/companies?
(steady state or flasher, contacting,…)
• How do we define efficiency of bifacial cells? Based on physics, economy,
performance? (aperture area, masking, albedo, photon flux (per area!),…)
• How to implement different installation scenarios in IV measurement?
• How to calculate Wp price (or cost) of bifacial solar cells?