Han Byung Suh, Caliskan Salim, Sohn Woonbae, Kim Miyoung, Lee Jung-Kun, Jang Ho Won
Department of Materials Science Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 151-744, South Korea.
Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15261, USA.
Nanoscale Res Lett. 2016 Dec;11(1):221. doi: 10.1186/s11671-016-1437-2. Epub 2016 Apr 26.
A facile approach to fabricate dye-sensitized solar cells (DSSCs) is demonstrated by depositing (001) oriented zinc oxide (ZnO) nanostructures on both glass and flexible substrates at room temperature using pulsed laser deposition. Unique crystallographic characteristics of ZnO combined with highly non-equilibrium state of pulsed laser-induced ablated species enabled highly crystalline ZnO nanostructures without aid of any chemically induced additives or organic/inorganic impurities at room temperature. Film morphology as well as internal surface area is tailored by varying ambient oxygen pressure and deposition time. It is revealed that the optimization of these two experimental factors was essential for achieving structure providing large surface area as well as efficient charge collection. The DSSCs with optimized ZnO photoanodes showed overall efficiencies of 3.89 and 3.4 % on glass and polyethylene naphthalate substrates, respectively, under AM 1.5G light illumination. The high conversion efficiencies are attributed to elongated electron lifetime and enhanced electrolyte diffusion in the high crystalline ZnO nanostructures, verified by intensity-modulated voltage spectroscopy and electrochemical impedance measurements.
通过在室温下使用脉冲激光沉积在玻璃和柔性基板上沉积（001）取向的氧化锌（ZnO）纳米结构，展示了一种制备染料敏化太阳能电池（DSSC）的简便方法。ZnO独特的晶体学特性与脉冲激光诱导烧蚀物种的高度非平衡状态相结合，使得在室温下无需任何化学诱导添加剂或有机/无机杂质的帮助就能制备出高度结晶的ZnO纳米结构。通过改变环境氧气压力和沉积时间来调整薄膜形态以及内表面积。结果表明，优化这两个实验因素对于实现提供大表面积以及有效电荷收集的结构至关重要。在AM 1.5G光照下，具有优化ZnO光阳极的DSSC在玻璃和聚萘二甲酸乙二醇酯基板上的总效率分别为3.89%和3.4%。通过强度调制电压光谱和电化学阻抗测量验证，高转换效率归因于高结晶ZnO纳米结构中延长的电子寿命和增强的电解质扩散。
