MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China.
Chemistry. 2010 Aug 2;16(29):8757-61. doi: 10.1002/chem.201000264.
Hierarchical ZnO hollow spheres (400-500 nm in diameter) consisting of ZnO nanoparticles with a diameter of approximately 15 nm have been successfully prepared by a facile and rapid sonochemical process. The formation of hierarchical ZnO hollow spheres is attributed to the oriented attachment and subsequent Ostwald ripening process according to time-dependent experiments. The as-prepared ZnO hollow spheres are used as a photoanode in dye-sensitized solar cells and exhibit a highly efficient power conversion efficiency of 4.33%, with a short-circuit current density of 9.56 mA cm(-2), an open-circuit voltage of 730 mV, and a fill factor of 0.62 under AM 1.5 G one sun (100 mW cm(-2)) illumination. Moreover, the photovoltaic performance (4.33%) using the hierarchical ZnO hollow spheres is 38.8% better than that of a ZnO nanoparticle photoelectrode (3.12%), which is mainly attributed to the efficient light scattering for the former.
通过一种简单快速的超声化学工艺，成功制备了由直径约 15nm 的 ZnO 纳米粒子组成的、具有 400-500nm 直径的分级 ZnO 空心球。根据时间依赖性实验，分级 ZnO 空心球的形成归因于定向附着和随后的奥斯特瓦尔德熟化过程。所制备的 ZnO 空心球被用作染料敏化太阳能电池的光阳极，并表现出高效的功率转换效率为 4.33%，短路电流密度为 9.56mA cm(-2)，开路电压为 730mV，填充因子为 0.62，在 AM 1.5G 一个太阳（100mW cm(-2)）光照下。此外，使用分级 ZnO 空心球的光伏性能（4.33%）比 ZnO 纳米粒子光电极（3.12%）好 38.8%，这主要归因于前者的高效光散射。
