Cobalt-nickel based ternary selenides as high-efficiency counter electrode materials for dye-sensitized solar cells
Cobalt-nickel based ternary selenides as high-efficiency counter electrode materials for dye-sensitized solar cells
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DOI：
10.1016/j.electacta.2017.03.100
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发表时间：
2017-05-01
影响因子：
6.6
通讯作者：
Zhou, Yuhan
中科院分区：
文献类型：
--
作者：
Jiang, Qingsong;Pan, Kai;Zhou, Yuhan
染料敏化太阳能电池（DSSC）的一个重要挑战是设计和构建具有良好电催化性能的低成本对电极（CE）。本文采用溶剂热法一步合成了不同钴镍比的钴镍基三元硒化物。采用简单的喷雾沉积法制备了CoNi基三元硒化物薄膜，并将其应用于DSSC中的低成本、高性能的CE。电化学测试结果表明，由于Co-Ni基三元硒化物中Co和Ni离子之间的协同作用，使得Co-Ni基三元硒化物CEs对13的还原具有很高的电催化活性和很强的电荷转移能力.特别是，Co_（0.42）Ni_（0.58）Se电极表现出比其他Co-Ni基三元硒化物电极和铂（Pt）电极更高的电催化活性。此外，具有Co 0.42 Ni 0.58 Se CE的DSSC表现出6.15%的光电转换效率（PCE），这显著高于具有Pt CE的DSSC的光电转换效率（5.53%）。(C)2017爱思唯尔有限公司版权所有
One important challenge in dye-sensitized solar cells (DSSCs) is to design and construct low-cost counter electrodes (CEs) with good electrocatalytic performance. In this work, a one-step solvothermal method was used to prepare cobalt-nickel (Co-Ni) based ternary selenides with different Co and Ni ratios. CoNi based ternary selenide films were fabricated by simple spray deposition for applications as low-cost and high-performance CEs in DSSCs. Electrochemical measurements demonstrate that the Co-Ni based ternary selenide CEs exhibit high electrocatalytic activity and strong charge-transfer ability for the reduction of 13 due to the synergistic effect between Co and Ni ions in Co-Ni based ternary selenides. In particular, Co0.42Ni0.58Se CE shows the higher electrocatalytic activity than other Co-Ni based ternary selenide CEs and platinum (Pt) CE. Furthermore, the DSSC with Co0.42Ni0.58Se CE exhibits photoelectrical conversion efficiency (PCE) of 6.15%, which is considerably higher than that of the DSSC with Pt CE (5.53%). (C) 2017 Elsevier Ltd. All rights reserved.