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RISS 인기검색어
- 검색키워드
- 저자 : Masood Mehrabian (검색결과 3 건)
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Masood Mehrabian,Sonya Aslyousefzadeh,M. Hadi Maleki 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.10
Zinc oxide nanorod arrays (ZnO NRs) were grown from ZnO seed-coated substrates in an aqueous solution by using the hydrothermal method for different growth periods varying from 5 min to 1 hour. The influence of the growth period of the ZnO nanorods on photovoltaic applications was studied in detail. Experimental results showed that utilization of the nanorod arrays lead to an enhanced the cell performance by increasing of light absorption and creation of a vertical direction for electron transport in the solar cells. A power conversion efficiency of 3.33% with an opencircuit voltage of VOC = 0.58 V, a short-circuit current of JSC = 10.05 mA/cm2 and a fill factor of FF = 54.35% was achieved for solar cells based on ZnO NRs with growth period of 20 min. Such solar cells with an optimal growth period are effective in light trapping, which leads to a significant enhancement in the absorption of light, and thereby, show an obvious increase in the power conversion efficiency.
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Masood Mehrabian,Hossein Afarideh,Kavoos Mirabbaszadeh,Li Lianshan,Tang Zhiyong 한국광학회 2014 Current Optics and Photonics Vol.18 No.4
Improved power conversion efficiency of hybrid solar cells with ITO/ZnO seed layer/ZnO NRs/ZnS QDs/P3HT/PCBM/Ag structure was obtained by optimizing the growth period of ZnO nanorods (NRs). ZnO NRs were grown using a hydrothermal method on ZnO seed layers, while ZnS quantum dots (QDs) (average thickness about 24 nm) were fabricated on the ZnO NRs by the successive ionic layer adsorption and reaction (SILAR) technique. Morphology, crystalline structure and optical absorption of layers were analyzed by a scanning electron microscope (SEM), X-ray diffraction (XRD) and UV-Visible absorption spectra, respectively. The XRD results implied that ZnS QDs were in the cubic phase (sphalerite). Other experimental results showed that the maximum power conversion efficiency of 4.09% was obtained for a device based on ZnO NR10 under an illumination of one Sun (AM 1.5G, 100 mW/cm2).
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Improve the performance of MAPbI3-based solar cells by adding PbS QD absorber layer
Mehrabian Masood,Norouzzadeh Pourya 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.83 No.4
In the present study, a reference solar cell with ITO/ZnO/MAPbI3/Spiro-OMeTAD/Ag structure with one absorber layer (MAPbI3 perovskite) was simulated and simulation results were compared with real experimental results. Then, to improve the performance of the reference cell, a layer of lead sulfde quantum dot (PbS QD) was used as the second absorber layer to produce a double-absorber solar cell. It was found that by inserting the PbS QD layer between MAPbI3 and Spiro-OMeTAD, the efciency of reference perovskite-based solar cells increases from 12.65 to 18.46% regarding the enhancement in current density (JSC) of the short circuit from 19.95 mA/cm2 to 30.45 mA/cm2 . Using a QD absorber beside the perovskite layer could be an efective approach to increase light absorption and photo-carrier generation in the device. For this double-absorber device, the power conversion efciency, flling factor (FF), and open-circuit voltage (VOC) of 18.46%, 67%, and 0.91 V were obtained under 1.5 AM illumination, and all properties were discussed.
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