2134/23056
Vasilios Palekis
Vasilios
Palekis
Shamara Collins
Shamara
Collins
Md Imran Khan
Md Imran
Khan
Vamsi Evani
Vamsi
Evani
Sudhajit Misra
Sudhajit
Misra
Michael A. Scarpulla
Michael A.
Scarpulla
Ali Abbas
Ali
Abbas
Michael Walls
Michael
Walls
Chris Ferekides
Chris
Ferekides
Near infrared laser CdCl2 heat treatment for CDTE solar cells
Loughborough University
2016
untagged
Mechanical Engineering not elsewhere classified
2016-11-04 10:07:21
Conference contribution
https://repository.lboro.ac.uk/articles/conference_contribution/Near_infrared_laser_CdCl2_heat_treatment_for_CDTE_solar_cells/9546734
The CdCl2 heat treatment (HT) is one of the most critical steps in the fabrication of high efficiency CdTe solar cells. In this study a laser based CdCl2 treatment is presented. A high power near infrared 808 nm) diode laser was used for laser
annealing (LA) CdTe cells. The effect of laser power density (LPD)and annealing time on the devices was
studied using photoluminescence PL), current voltage and spectral response measurements. PL spectra exhibited a correlation between the LPD and the defect density in CdTe. CdS thinning and narrowing
of the CdTe bandgap was observed with increasing LPD and longer anneal times. All solar cell parameters,
open-circuit voltage (VOC), short-circuit current (JSC), and fill-factor (FF), improved as a result of the laser annealing compared to as-deposited cells. The LPD was optimized with best cell parameters
obtained to-date being: VOC=800mV, JSC= 23.34 mA/cm2, and FF=71%.