还原氧化石墨烯-氮化钽复合作为高性能对电极用于 Co(bpy)3(3+/2+)-敏化染料太阳能电池。
Reduced graphene oxide-TaON composite as a high-performance counter electrode for Co(bpy)3(3+/2+)-mediated dye-sensitized solar cells.
机构信息
Department of Chemistry, Lab of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, PR China.
出版信息
ACS Appl Mater Interfaces. 2013 Aug 28;5(16):8217-24. doi: 10.1021/am402353m. Epub 2013 Jul 24.
We report herein the investigation of TaON nanoparticles incorporating a reduced graphene oxide (RGO) nanocomposite as a counter electrode for application in Co(bpy)3(3+/2+) (bpy = 2,2'-bipyridine)-mediated dye-sensitized solar cells (DSSCs). The RGO-TaON nanocomposite has been prepared by mixing graphene oxide (GO) and presynthesized TaON nanoparticles in ethanol/water followed by the facile hydrazine hydrate reduction of GO to RGO. Compared with RGO or TaON alone, the RGO-TaON nanocomposite shows a much higher electrocatalytic activity for the reduction of Co(bpy)3(3+) species owing to synergistic effects, resulting in significantly improved solar-cell performance when it is applied as the counter electrode in DSSCs. An efficiency of 7.65% for the DSSC with the RGO-TaON counter electrode is obtained, competing with the efficiency produced by the Pt counter electrode; additionally, the former exhibits a much better electrochemical stability than the latter in a Co(bpy)3(3+/2+) acetonitrile solution.
我们在此报告了一种将还原氧化石墨烯（RGO）纳米复合材料与 TaON 纳米粒子结合的 TaON 纳米粒子作为对电极，用于 Co(bpy)3(3+/2+)（bpy = 2,2'-联吡啶）介导的染料敏化太阳能电池（DSSCs）中的应用。RGO-TaON 纳米复合材料是通过将氧化石墨烯（GO）和预先合成的 TaON 纳米粒子在乙醇/水中混合，然后用简单的水合肼还原 GO 得到 RGO 来制备的。与单独的 RGO 或 TaON 相比，由于协同效应，RGO-TaON 纳米复合材料对 Co(bpy)3(3+)物种的还原具有更高的电催化活性，因此当其用作 DSSCs 的对电极时，显著提高了太阳能电池的性能。使用 RGO-TaON 对电极的 DSSC 的效率达到 7.65%，与 Pt 对电极的效率相当；此外，在 Co(bpy)3(3+/2+)乙腈溶液中，前者比后者具有更好的电化学稳定性。
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