Loading...

Preparation of Tthin Film CdS/CdTe Solar Cells: Containing CdS Nanowires and CdTe Particles

Akhlaghi, Mohammad Hossein | 2013

583 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43426 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Mohammadi, Mohammad Reza
  7. Abstract:
  8. In the present work, we have designed a novel CdS/CdTe solar cell based on CdS nanowires, as a window layer, and CdTe nanoparticles, as a absorber layer. CdS nanowires and CdTe nanoparticles were synthesized by solvothermal method. The samples were characterized by X-ray diffraction diffractometer (XRD), field emission scanning electron microscope (FE-SEM), Atomic Force Microscope (AFM) and Ultraviolet–Visible (UV–vis) spectroscopy spectrometer. Photocurrent measurements were carried out using a 150 W xenon lamp with an air-mass (AM) 1.5 filter. The performance of the solar cell based on the CdS nanowire (NW-CdS) film with 225 nm thickness and CdTe nanoparticle (NP-CdTe) film with 6 μm thickness was higher than other cells. For this cell, open circuit voltage, short circuit current density, fill factor and power conversion efficiency values were 0.62 V, 6.82 mA.cm−2, 59.7% and 2.53%, respectively. As a result, the optimum thickness of CdS and CdTe films was calculated around 225 nm and 6 μm, respectively. The results showed that the cells based on the mixture of CdS nanowires and nanoparticles had the highest conversion efficiency (3.05%) compared with the cells made of pure nanowires (2.53%) and pure nanoparticles (2.73%). In addition, the performance of the solar cell was improved using CdTe nanoparticles rather than CdTe microparticles. The high surface area to volume ratio and high surface contact of nanoparticles improved photo-generated electron transport and reduced series resistance.
  9. Keywords:
  10. Cadmium Sulfide/Cadmium Telluride (CdS/CdTe)Solar Cell ; Cadmium Sulfide Nanowire ; Solar Conversion Efficiency ; Solvothermal Method ; Cadmium Telluride ; Cadmium Sulfide Nanoparticles

 Digital Object List

 Bookmark

No TOC