Kao Ming-Cheng, Chen Hone-Zern, Young San-Lin, Lin Chen-Cheng, Kung Chung-Yuan
Department of Electronic Engineering, Hsiuping University of Science and Technology, Taichung, 412, Taiwan.
Nanoscale Res Lett. 2012 May 18;7(1):260. doi: 10.1186/1556-276X-7-260.
Aligned ZnO nanowires with different lengths (1 to approximately 4 μm) have been deposited on indium titanium oxide-coated glass substrates by using the solution phase deposition method for application as a work electrode in dye-sensitized solar cells (DSSC). From the results, the increases in length of zinc oxide (ZnO) nanowires can increase adsorption of the N3 dye through ZnO nanowires to improve the short-circuit photocurrent (Jsc) and open-circuit voltage (Voc), respectively. However, the Jsc and Voc values of DSSC with ZnO nanowires length of 4.0 μm (4.8 mA/cm2 and 0.58 V) are smaller than those of DSSC with ZnO nanowires length of 3.0 μm (5.6 mA/cm2 and 0.62 V). It could be due to the increased length of ZnO nanowires also resulted in a decrease in the transmittance of ZnO nanowires thus reducing the incident light intensity on the N3 dye. Optimum power conversion efficiency (η) of 1.49% was obtained in a DSSC with the ZnO nanowires length of 3 μm.
通过溶液相沉积法，已将不同长度（1至约4μm）的取向氧化锌纳米线沉积在涂有铟钛氧化物的玻璃基板上，用作染料敏化太阳能电池（DSSC）的工作电极。结果表明，氧化锌（ZnO）纳米线长度的增加可分别通过ZnO纳米线增加N3染料的吸附，从而提高短路光电流（Jsc）和开路电压（Voc）。然而，ZnO纳米线长度为4.0μm的DSSC的Jsc和Voc值（4.8mA/cm²和0.58V）小于ZnO纳米线长度为3.0μm的DSSC的Jsc和Voc值（5.6mA/cm²和0.62V）。这可能是由于ZnO纳米线长度的增加也导致ZnO纳米线的透光率降低，从而降低了N3染料上的入射光强度。在ZnO纳米线长度为3μm的DSSC中获得了1.49%的最佳功率转换效率（η）。
