Title :
Long-term efficiency gain of Cu(In, Ga)Se2 solar cell
Author :
Deok-In Kim ; Sang-wook Park ; Soon-Rok Park ; Ju-Young Baek ; Tae-young Yun ; Hye-Jin Han ; Chan-Wook Jeon
Author_Institution :
Yeungnam Univ., Gyeongsan, South Korea
Abstract :
The electrical performance of Cu(In, Ga)Se2 solar cells were measured repeatedly over several months period. The efficiency was found to continue to improve with aging time due to substantially increased doping density in the space charge region. The long-term aging effect was found to be irreversible and to disappear by thermal annealing. The increase of doping density was probably originated from Cu migration taking place under the influence of electric field existing in the space charge region.
Keywords :
ageing; annealing; copper compounds; solar cells; space charge; ternary semiconductors; Cu(InGa)Se2; doping density; electric field; long-term aging effect; solar cell; space charge region; thermal annealing; Aging; Annealing; Doping; Performance evaluation; Photovoltaic cells; Temperature measurement; Zinc oxide; Cu migration; Cu(In, Ga)Se2; aging effect; annealing; doping density; solar cell;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th
Conference_Location :
Tampa, FL
DOI :
10.1109/PVSC.2013.6744859
