Author(s)

Robinson Musembi, Bernard Aduda, Julius Mwabora, Marin Rusu, Kostantinos Fostiropoulos, Martha Lux-Steiner

Department of Physics, School of Physical Sciences, University of Nairobi, Nairobi, Kenya.
Solarenergieforsung (SE2), Lise- Meitner Campus, Hermholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany.

Light soaking characterization on complete SnO₂:F/TiO₂/In(OH)_xS_y/Pb(OH)_xS_y/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)_xS_y/Pb(OH)_xS_y/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)_xS_y. These effects take place at almost fill factor and open circuit voltage being unaffected by the light soaking effects.

Eta Solar Cell; Light Soaking; Conversion Efficiency; TiO₂; In(OH)_xS_y; Pb(OH)_xS_y

R. Musembi, B. Aduda, J. Mwabora, M. Rusu, K. Fostiropoulos and M. Lux-Steiner, "Light Soaking Induced Increase in Conversion Efficiency in Solar Cells Based on In(OH)_xS_y/Pb(OH)_xS_y," Materials Sciences and Applications, Vol. 4 No. 11, 2013, pp. 718-722. doi: 10.4236/msa.2013.411090.