عنوان مجله
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JOURNAL OF OPTICAL TECHNOLOGY
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چکیده
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Hybrid solar cells with ITO/AZO/ZnS/P3HT/PCBM/Ag structure were fabricated so that, in the
synthesis of the ZnS layer, the successive ion layer absorption and reaction (SILAR) technique was
used. At first, Al-doped ZnO (AZO) layers with different molar concentrations of Al were deposited
on ITO-glass substrates, and the optimum concentration was determined to produce the maximum
power conversion efficiency. The ZnS layer with different SILAR cycles was then grown on ITO/
AZO to fabricate the highly efficient solar cell. X-ray diffraction analysis confirmed the formation
of pure, nanocrystalline, and cubic structure of ZnS. Optical measurements showed that the band gap
of ZnS quantum dots varies in a narrow range of 3.8–4.0 eV, depending on the number of SILAR
cycles. The effect of the number of cycles on the solar cell performance was investigated. The
photovoltaic properties of fabricated cells under the illumination of one sun (AM 1.5, 100 mW∕cm2)
have been examined. The results indicated that changing the number of SILAR cycles improves the
performances of the fabricated photovoltaic cells; a high efficiency of 3.25% was observed at six
cycles.
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