Growth, properties and dye-sensitized solar cells–applications of ZnO nanorods grown by low-temperature solution process |
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| Authors: | A Al-Hajry Ahmad Umar YB Hahn DH Kim |
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| Institution: | 1. Department of Physics, Faculty of Science, Najran University, P.O. Box 1988 Najran 11001, Saudi Arabia;2. Department of Chemistry, Faculty of Science, Najran University, P.O. Box 1988 Najran 11001, Saudi Arabia;3. School of Semiconductor and Chemical Engineering and BK21 Centre for Future Energy, Materials and Devices, Chonbuk National University, Chonju 561-756, South Korea;4. Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, South Korea |
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| Abstract: | Hexagonal-shaped small ZnO nanorods were grown in a large-quantity via simple aqueous solution process by using zinc nitrate as a source of zinc ions at low temperature under stirring. The as-grown hexagonal-shaped ZnO nanorods were characterized in detail in terms of their structural, optical and photovoltaic properties. The detailed structural investigations by HRTEM, SAED and FFT revealed that the as-synthesized ZnO nanorods are well-crystalline, possessing a perfect hexagonal ideal growth habits of wurtzite zinc oxide and grown along the 0001] direction in preference. The optical properties, composition and quality of the as-synthesized nanorods were examined by using UV-visible and FTIR spectroscopy. Moreover, films of as-grown nanorods were used as photoanode materials to fabricate the dye sensitized solar cells (DSSCs). An overall light to electricity conversion efficiency of 0.70% with a fill factor of 47.2%, short-circuit current of 1.8 mA/cm2 and open-circuit voltage of 0.76 V were achieved for the solar cell based on hexagonal-shaped small ZnO nanorods. |
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| Keywords: | II– VI semiconductor ZnO Nanorods Solution process |
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