One-Pot Solvothermal in Situ Growth of 1D Single-Crystalline NiSe on Ni Foil as Efficient and Stable Transparent Conductive Oxide Free Counter Electrodes for Dye-Sensitized Solar Cells
One-Pot Solvothermal in Situ Growth of 1D Single-Crystalline NiSe on Ni Foil as Efficient and Stable Transparent Conductive Oxide Free Counter Electrodes for Dye-Sensitized Solar Cells
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DOI：
10.1021/acsami.6b10198
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发表时间：
2016-12-07
影响因子：
9.5
通讯作者：
Sun, Xiaohua
中科院分区：
文献类型：
--
作者：
Bao, Chao;Li, Faxin;Sun, Xiaohua
通过两种简单的一步溶剂热方法，成功在金属镍箔上原位生长一维单晶纳米结构硒化镍，形成用于染料敏化太阳能电池（DSSC）的NiSe/Ni对电极（CE）。镍箔在反应过程中充当镍源、支撑基底和电子传输“高速公路”。电化学测试表明，顶部一维单晶 NiSe 对 I-3(-) 还原表现出显着的电催化活性。由于Ni基底的金属导电性和单晶NiSe出色的电催化活性，基于NiSe/Ni CE的DSSC比基于Pt/FTO CE的DSSC表现出更高的填充因子（FF）和更大的短路电流密度（J（sc））。相应的功率转换效率（6.75%）优于后者（6.18%）。此外，NiSe/Ni CEs在I-/I-3(-)氧化还原电解质中也表现出优异的电化学稳定性。这些发现表明，在 Ni 衬底上原位生长的单晶 NiSe 是替代 Pt/TCO 作为 DSSC 廉价高效对电极的潜在候选者。
One-dimensional single-crystal nanostructural nickel selenides were successfully in situ grown on metal nickel foils by two simple one-step solvothermal methods, which formed NiSe/Ni counter electrodes (CEs) for dye-sensitized solar cells (DSSCs). The nickel foil acted as the nickel source in the reaction process, a supporting substrate, and an electron transport "speedway". Electrochemical testing indicated that the top 1D single-crystal NiSe exhibited prominent electrocatalytic activity for I-3(-) reduction. Due to the metallic conductivity of Ni substrate and the outstanding electrocatalytic activity of single-crystal NiSe, the DSSC based on a NiSe/Ni CE exhibited higher fill factor (FF) and larger short-circuit current density (J(sc)) than the DSSC based on Pt/FTO CE. The corresponding power conversion efficiency (6.75%) outperformed that of the latter (6.18%). Moreover, the NiSe/Ni CEs also showed excellent electrochemical stability in the I-/I-3(-) redox electrolyte. These findings indicated that single-crystal NiSe in situ grown on Ni substrate was a potential candidate to replace Pt/TCO as a cheap and highly efficient counter electrode of DSSC.