In situ fabrication of Cu2-xSe networks nanostructure counter electrode based on Ti substrate via sacrifice template method for quantum dot sensitized solar cells
In situ fabrication of Cu2-xSe networks nanostructure counter electrode based on Ti substrate via sacrifice template method for quantum dot sensitized solar cells
复制标题
牺牲模板法原位制备基于Ti基底的Cu2-xSe网络纳米结构对电极用于量子点敏化太阳能电池
DOI：
10.1016/j.solener.2019.08.076
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发表时间：
2019
期刊：
影响因子：
6.7
通讯作者：
Xie Tengfeng
中科院分区：
文献类型：
--
作者：
Chen Yifan;nWag Dejun;Lin Yanhong;Zou Xiaoxin;Xie Tengfeng
采用牺牲模板法（CuTi 2S 4和Cu）在Ti基体上制备了两种不同形貌的Cu 2 −xSe，包括网络纳米结构和纳米片结构.相应的Cu 2 −xSe/CuTi CE和Cu 2 −xSe/Cu CE可用作量子点敏化太阳能电池（QDSC）的对电极（CE）。结果，与Cu 2 − xSe/Cu CE（4.83%）相比，由Cu 2 − xSe/CuTi-4 CE制造的电池在1太阳（100 mW/cm 2）照射下表现出6.25%的光电转换效率（PCE）。根据瞬态光电流（TPC）结果，与Cu 2 −xSe/Cu CE相比，改善的光伏性能可以归因于对多硫化物电解质的改善的电催化活性。这些结果与对称电池的EIS分析和Tafel极化曲线结果相一致。此外，Cu 2 −xSe/CuTi CE的出色稳定性可以通过循环伏安法（CV）测试进一步证明。综上所述，Cu 2 −xSe/CuTi CE是一种很有前途的材料，在太阳能电池中有很好的应用前景。
An efficient and simple strategy is designed for the synthesis of Cu2−xSe with two different morphology, including networks nanostructure and nanosheets structure, based on Ti substrate using a sacrificial template method (CuTi2S4and Cu). The corresponding Cu2−xSe/CuTi CE and Cu2−xSe/Cu CE could be applied as counter electrodes (CE) for quantum dot sensitized solar cells (QDSCs). As a result, the cell fabricated by Cu2−xSe/CuTi-4 CE exhibits a photoelectric conversion efficiency (PCE) of 6.25% under 1 sun (100 mW/cm2) illumination as compared to that of Cu2−xSe/Cu CE (4.83%). According to transient photocurrent (TPC) result, the improving photovoltaic performance could be attributed to the improving electrocatalytic activity towards polysulfide electrolyte as compared to Cu2−xSe/Cu CE. These results are in accordance with the EIS analysis and Tafel polarization curve results for symmetrical cell. In addition, the outstanding stability of Cu2−xSe/CuTi CE could be further proved by cyclic voltammetry (CV) test. In conclusion, the Cu2−xSe/CuTi CE could be a promising material and the applications in solar cells.