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Electrical Characterization of II-VI Thin Films for Solar Cells Application Farhan Ahmad; Nadir Qurban; Zain Fatima; Toqeer Ahmad; Iqra Zahid; Ahmad Ali; Sehrish Rana Rajpoot; Muhammad Wasim Tasleem; Esha Maqbool
ASEAN Journal of Science and Engineering Vol 2, No 2 (2022): AJSE: September 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (777.79 KB) | DOI: 10.17509/ajse.v2i3.39425

Abstract

Cds and CdTe both are effective absorber semiconductors for thin-film solar cells. It is a naturally n-type material, which has a direct bandgap value of 2.42 eV at room temperature It has great importance in light detectors in this work, CdS thin films (TF) were synthesized on glass substrates by RF Magnetron sputtering technique in an inert gas atmosphere. The electrical properties of CdS were characterized by the Van Der Pauw method. The films showed p-type conductivity, while the films deposited at different annealed times exhibited n-type conductivity. The resistivity of the CdTe films decrease as the conductivity increased. As the source rate was increased, the hole concentration in the as-grown p-type CdTe films increased. It was also reported annealing process affects the electrical properties. Al doping CdS the value of resistivity becomes minimum as the resistivity becomes maximum although mobility has maximum value after an increase in Al doping the mobility value. As a result, the CdS/CdTe thin-film showed enhanced electrical properties for solar cell applications.
Magnetic resonance imaging (MRI) Raw Data Results and Its Diagnosis of Spinal Cord Injuries: Patient Case Sehrish Rana Rajpoot; Muhammad Wasim Tasleem; Muhammad Danish; Hafiz Muhammad Ayub; Tasleem Kanwal; Mehboob Ahmad; Aalia Nazir; Muhammad Ismail; Muhammad Salman
ASEAN Journal of Science and Engineering Vol 1, No 3 (2021): AJSE: December 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1152.965 KB) | DOI: 10.17509/ajse.v1i3.39734

Abstract

In the present study, we discussed the best techniques for the clear scan of the spine. For this investigation, it was found that magnetic resonance imaging (MRI) is a better technique as compared to others. It gives proper images and results in the case of hard tissues like the spine compared to X-Ray and computed tomography (CT) scans. It is also better in sense of it has a small radiation risk as compared to X-Ray and CT have some radiation hazards to patient health. Thirteen patients were scanned by MRI technique and the result was evaluated. It is a non-invasive technique and is used for different pathological diseases. It was found that most doctors and surgeons preferred the MRI techniques in the case of the Spinal Cord. Many radiologists exercised X-rays, CT, and MRI methods for viewing clear images of the spine. It was concluded that MRI is the best technique than X-rays and CT scans. MRI is a modality choice for the evaluation of soft tissue changes in the case of Cord. In the case of the Spinal Cord MRI better evaluates changes in spinal cord compression due to its high-resolution property. The CT could not tell us about the soft tissue change in Cord however it more clearly tells us about the fracture of vertebral bodies and posterior elements.