TITLE:
Light Soaking Induced Increase in Conversion Efficiency in Solar Cells Based on In(OH)xSy/Pb(OH)xSy
AUTHORS:
Robinson Musembi, Bernard Aduda, Julius Mwabora, Marin Rusu, Kostantinos Fostiropoulos, Martha Lux-Steiner
KEYWORDS:
Eta Solar Cell; Light Soaking; Conversion Efficiency; TiO2; In(OH)xSy; Pb(OH)xSy
JOURNAL NAME:
Materials Sciences and Applications,
Vol.4 No.11,
November
19,
2013
ABSTRACT: Light soaking characterization on complete SnO2:F/TiO2/In(OH)xSy/Pb(OH)xSy/PEDOT:PSS/Au, eta solar cell structure as well as on devices which do not include one or both TiO2 and/or PEDOT:PSS layers has been conducted. Additionally, studies of SnO2:F/In(OH)xSy/Pb(OH)xSy/PEDOT:PSS/Au solar cell have been performed. The power conversion efficiency and the short circuit current density have been found to increase with light soaking duration by a factor of about 1.6 - 2.7 and 2.1 - 3, respectively. The increase in these two parameters has been attributed to the filling up of trap states and/or charge-discharge of deep levels found in In(OH)xSy. These effects take place at almost fill factor and open circuit voltage being unaffected by the light soaking effects.