INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Photoinduced charge carriers Dynamics on solution-based CuInS2/ZnO Solar cells
Autor/es:
PEREYRA, C.J.; M. VAZQUEZ; BERRUET, M.; DI IORIO, Y.; MAROTTI, R.E.
Lugar:
Trieste
Reunión:
Workshop; Workshop on Spectroscopy and Dynamics of Photoinduced Electronic Excitations; 2017
Institución organizadora:
International Centre for Theoretical Physics
Resumen:
The internal charge carrier dynamics of different solar cells were studied, the samples were prepared in the superstrate configuration combining ZnO as an n-type transparent layer, In2S3 as a buffer layer and CuInS2 as the absorbing p-type layer.The main dynamics of the samples were characterized by Intensity Modulated Photovoltage and Photocurrent Spectroscopy (IMVS and IMPS respectively). By means of the IMVS analysis the characteristic electron lifetime or electron-hole recombination time could be obtained.Moreover, by IMPS the characteristic time of the combined recombination and transport process could be obtained.A modulated red LASER (Coherent LabLaser C MVP λ=635 nm 7 mW) was used as a source of optical excitation. Various frequency sweeps were performed from 1 Hz to 90 kHz triggered by a signal generator (Tecktronix AFG 3022B). Two Lock-In amplifiers (Stanford Research Systems SRS-530) were used to detect the signals (photocurrent or photovoltage), finally a photodiode (UV Enhanced Silicon Detector ) was used for monitor the LASER signal, moreover this signalwas used to avoid spurious intensity fluctuations and for a normalization between different measurements.