A strategy for enhancing the performance of CdS-based hybrid photovoltaic cells via Co addition
Öz
This paper demonstrates the positive role of Co atoms on the performance of CdS-based hybrid photovoltaics. Spherical shaped CdS and CdS:Co films were grown on indium tin oxide (ITO)-covered glass slides, while P3HT was individually covered on these spheres. The transparency of devices improved with introducing the Co atoms into CdS matrix in the near infrared region, while a corresponding reduction in absorption was noted. Photoluminescence (PL) data showed that a diminish in the peak intensity of PL, suggesting the development of additional defect levels in the band gap which behaves as non-radiative recombination centers. The current density-voltage (J-V) characteristics indicated that the ITO/N719/CdS:Co(5%)/P3HT/Ag device achieved an overall efficiency of 0.028%, representing almost a sixfold increase over the control device. This enhancement is possibly attributed to the enhanced generation of electron-hole pairs owing to effective charge separation at the CdS:Co/P3HT interface.
Anahtar Kelimeler
CdS:Co thin films, P3HT, CBD, optical properties, power conversion efficiency
Kaynakça
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