Three-dimensional vertically aligned hybrid nanoarchitecture of two-dimensional molybdenum disulfide nanosheets anchored on directly grown one-dimensional carbon nanotubes for use as a counter electrode in dye-sensitized solar cells
Three-dimensional vertically aligned hybrid nanoarchitecture of two-dimensional molybdenum disulfide nanosheets anchored on directly grown one-dimensional carbon nanotubes for use as a counter electrode in dye-sensitized solar cells
复制标题
DOI：
10.1016/j.jallcom.2016.09.149
复制
发表时间：
2017-01-25
影响因子：
6.2
通讯作者：
Hsieh, Chien-Kuo
中科院分区：
文献类型：
--
作者：
Lin, Che-Hsien;Tsai, Chuen-Horng;Hsieh, Chien-Kuo
合成了二维二硫化钼（MoS 2）纳米片，并将其锚在氟化氧化锡（FTO）玻璃上直接生长的一维碳纳米管（CNTs）表面。这种三维（3D）垂直排列的混合纳米结构被用于染料敏化太阳能电池（DSSC）的无铂对电极（CE）。所制备的具有暴露层的2D MoS 2纳米片为I-3（-）还原提供了大量的边缘平面催化活性位点。直接生长的一维碳纳米管提供了一个有吸引力的模板，提供了一个大的表面积，以促进负载的二维二硫化钼纳米片，提高电化学活性。直接生长在FTO衬底上的CNT提供了促进电荷传输和转移的高速路径，导致较低的电子寿命，从而增加了交换电流密度并降低了电荷转移电阻。用3D垂直排列的MoS 2/CNT混合纳米结构CE组装的DSSC实现了7.83%的功率转换效率，比用Pt膜CE制备的电池（7.15%）高9.5%。(C)© 2016 Elsevier B. V.版权所有。
Two-dimensional (2D) molybdenum disulfide (MoS2) nanosheets were synthesized to anchor onto the surfaces of directly grown one-dimensional (1D) carbon nanotubes (CNTs) on fluorinated tin oxide (FTO) glass. This three-dimensional (3D) vertically aligned hybrid nanoarchitecture was used in Pt-free counter electrodes (CEs) for dye-sensitized solar cells (DSSCs). The prepared 2D MoS2 nanosheets, with exposed layers, provided a great deal of edge-plane catalytically active sites for I-3(-) reduction. The directly grown 1D CNTs provide an attractive template that offers a large surface area to promote the loading of 2D MoS2 nanosheets for enhancing electrochemical activity. The CNTs directly grown on the FTO substrate provided a high-speed pathway that promoted charge transport and transfer, resulting in a lower electron lifetime that increased the exchange current density and reduced the charge-transfer resistance. The DSSCs assembled with the 3D vertically aligned MoS2/CNT hybrid nanoarchitecture CE achieved a power conversion efficiency of 7.83%, 9.5% higher than that of a cell prepared with a Pt film CE (7.15%). (C) 2016 Elsevier B.V. All rights reserved.