Browsing by Author "Muhammad Tahir Iqbal"

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    A Study on Downconversion Emission: a Possible Route to Enhance Solar Cell Efficiency
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2022) Muhammad Tahir Iqbal; SP20-RPH-002; Dr. Saif Ur Rehman; LHR TP 7678
    In this work, the europium doped Zinc tellurite glass was prepared by using the melting quenching method. Raman spectroscopy observe the vibrational modes, three main characteristic Raman peaks at 432 cm-1, 667 cm-1 and 744 cm-1 observed in all the samples. PL spectroscopy defines the emission behavior of the material, maximum photoluminescence intensity was observed in the hypertensive transition 5D0 - 7F2, indicating that the strong chemical interaction between the Eu3+ ion in T2, and T3 sample. The performance of the p3ht-pcbm61 solar cell improves from 1.75% to 1.84 percent (approximately 6%), and to 1.78% when covered solar cell with Eu3+doped tellurite glass and Eu3+doped tellurite glass containing gold nanoparticles, respectively. Whereas, UV-Vis spectroscopy defines absorption behaviour of the material, calculated the band gap of prepared glass sample are 3.1eV, 2.3eV, and 2.7eV for T1, T2, and T3, respectively.