Longi has a detailed comparison of boron doped and gallium doped cell characteristics here: https://en.longi-solar.com/home/events/press_detail/id/228_Gallium-

Longi has a detailed comparison of boron doped and gallium doped cell characteristics here: https://en.longi-solar.com/home/events/press_detail/id/228_Gallium-doped_monocrystalline_silicon_fully_solves_the_problem_of_a_PERC_module_s_LID.html https://en.longi-solar.com/home/events/press_detail/id/228_G... There are modest but real improvements in efficiency and resistance to multiple cell degradation mechanisms. Cell lifetime does not have a hard cutoff. Typically a panel's lifetime is limited by failed backsheets or wiring/soldering rather than by the more gradual optical-electronic degradation mechanisms that gallium doping helps prevent.