L R AS Published on Saturday 12 September 2020 - n° 331 - Categories:fundamentals, fundamentals PV, cells, IBC. heterojunction
Heterojunction cells are sensitive to light-induced degradation (LID).
Heterojunction cells are sensitive to light-induced degradation (LID). It can lead to an absolute loss of efficiency of up to
0.8%, depending on temperature and light intensity. This degradation occurs at temperatures above 85 degrees Celsius and increases with temperature. After five minutes at 160 degrees Celsius, the cells had an average loss of 0.8% efficiency. Longer exposure triggered a recovery mechanism: the efficiency loss is reduced to 0.15% after two hours at 160 degrees Celsius and with the same solar illumination. An increase in light intensity accelerates the recovery phase without any discernible effect on degradation. Therefore, a rapid improvement in the efficiency of heterojunction solar cells can be achieved by using annealing under high temperature illumination.
https://www.pv-magazine.com/2020/09/10/heating-up-the-heterojunction-lid-discussion/
PV Magazine of 10 September
