Umar Ahmad, Alharbi A A, Singh Pragya, Al-Sayari S A
Advanced Materials and Nano-Engineering Laboratory (AMNEL), Centre for Advanced Materials and Nano-Engineering (CAMNE), Najran University, P.O. Box 1988, Najran 11001, Kingdom of Saudi Arabia.
J Nanosci Nanotechnol. 2011 Apr;11(4):3560-4. doi: 10.1166/jnn.2011.4150.
This article reports a facile growth of well-crystalline aligned hexagonal ZnO nanorods on fluorine-doped tin-oxide (FTO) substrate via non-catalytic thermal evaporation process. The morphological investigations done by field-emission scanning electron microscope (FESEM) and transmission electron microscopy (TEM) reveal that the grown products are aligned hexagonal ZnO nanorods which are grown in a very high density over the whole substrate surface. The detailed structural properties observed by high-resolution TEM equipped with selected area electron diffraction (SAED) and X-ray diffraction (XRD) pattern confirmed that the synthesized nanorods are well-crystalline possessing wurtzite hexagonal phase and preferentially grown along the c-axis direction. A sharp and strong UV emission at 381 nm in room-temperature photoluminescence (PL) spectrum showed that the as-grown ZnO nanorods possess excellent optical properties. The as-grown nanorods were used as photo-anode for the fabrication of dye-sensitized solar cells (DSSCs) which exhibits an overall light-to-electricity conversion efficiency (ECE) of 0.7% with V(oc) of 0.571 V, J(sc) of 2.02 mA/cm2 and FF of 0.58.
本文报道了通过非催化热蒸发工艺在氟掺杂氧化锡（FTO）衬底上轻松生长出结晶良好的取向六方氧化锌纳米棒。用场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）进行的形态学研究表明，生长产物是取向六方氧化锌纳米棒，它们以非常高的密度生长在整个衬底表面。配备选区电子衍射（SAED）的高分辨率TEM和X射线衍射（XRD）图谱观察到的详细结构特性证实，合成的纳米棒结晶良好，具有纤锌矿六方相，且优先沿c轴方向生长。室温光致发光（PL）光谱中在381nm处有尖锐且强烈的紫外发射，表明生长的氧化锌纳米棒具有优异的光学性能。生长的纳米棒用作制备染料敏化太阳能电池（DSSC）的光阳极，该电池的整体光电转换效率（ECE）为0.7%，开路电压（V(oc)）为0.571V，短路电流密度（J(sc)）为2.02mA/cm²，填充因子（FF）为0.58。
