کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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188287 | 459658 | 2012 | 10 صفحه PDF | دانلود رایگان |

In this paper, flower-like porous ZnO nanosheets were synthesized by indirect electrodeposition method using zinc hydroxide nitrate hydrate (Zn5(OH)8(NO3)22H2O) as precursor. The flower-like Zn5(OH)8(NO3)22H2O nanosheets were first electrodeposited by controlling the concentration of Zn(NO3)2 in electrolyte and the electrochemical behavior and growth process of Zn5(OH)8(NO3)22H2O were also discussed in comparison with those of ZnO. Flower-like porous ZnO nanosheets were obtained by heat treatment due to the decomposition of Zn5(OH)8(NO3)22H2O. The nanosheets were highly porous and were composed of the ZnO nanoparticles with the grain size about tens of nanometers. The characterization measurements indicated that the flower-like porous ZnO nanosheets were an n-type semiconductor with a band gap of 3.16 eV and a carrier concentration of 2.05 × 1020 cm−3. Besides, the flower-like porous ZnO nanosheets displayed a broad green emission at around 475 nm. Once applied in quantum dots-sensitized solar cells (QDSCs), the flower-like porous ZnO nanosheets exhibited a good performance as the photoanode of QDSCs.
Journal: Electrochimica Acta - Volume 78, 1 September 2012, Pages 55–64