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Development of a WS2/MoTe2 heterostructure as a counter electrode for the improved performance in dye-sensitized solar cells†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-11-06 00:00:00 , DOI: 10.1039/c8qi00831k Sajjad Hussain 1, 2, 3, 4, 5 , Supriya A. Patil 4, 6, 7, 8, 9 , Anam Ali Memon 4, 7, 9, 10, 11 , Dhanasekaran Vikraman 4, 12, 13, 14 , Hafiz Ghulam Abbas 4, 15, 16, 17, 18 , Sung Hoon Jeong 4, 7, 10, 19 , Hyun-Seok Kim 4, 12, 13, 14 , Hak-Sung Kim 4, 6, 7, 8, 9 , Jongwan Jung 1, 2, 3, 4, 5
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-11-06 00:00:00 , DOI: 10.1039/c8qi00831k Sajjad Hussain 1, 2, 3, 4, 5 , Supriya A. Patil 4, 6, 7, 8, 9 , Anam Ali Memon 4, 7, 9, 10, 11 , Dhanasekaran Vikraman 4, 12, 13, 14 , Hafiz Ghulam Abbas 4, 15, 16, 17, 18 , Sung Hoon Jeong 4, 7, 10, 19 , Hyun-Seok Kim 4, 12, 13, 14 , Hak-Sung Kim 4, 6, 7, 8, 9 , Jongwan Jung 1, 2, 3, 4, 5
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A facile large-area synthesis of a WS2/MoTe2 heterostructure via a sputtering–CVD approach on conductive glass substrates was demonstrated and, for the first time, it was used as a counter electrode (CE) for dye-sensitized solar cells (DSSCs). Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel curves verified that the unique structure is beneficial for improving the catalytic activity for the reduction of triiodide to iodide and a low charge transfer resistance at the electrode/electrolyte interface. The thicknesses of the top and bottom layers of WS2/MoTe2 were varied to achieve high DSSC performance. Consequently, DSSCs assembled with the optimized WS2/MoTe2 CE reached a high power conversion efficiency (PCE) of 7.99%, which is comparable to the conventional Pt CE (8.50%) and their pristine WS2 and MoTe2 CEs (6.3% and 7.25%, respectively). Our findings create a way to prepare DSSCs with efficient performance.
中文翻译：
开发WS 2 / MoTe 2异质结构作为对电极，以提高染料敏化太阳能电池的性能†
通过溅射-CVD方法在导电玻璃基板上轻松实现了WS 2 / MoTe 2异质结构的大面积合成，并且首次将其用作染料敏化太阳能电池的对电极（CE）（ DSSC）。循环伏安法（CV），电化学阻抗谱（EIS）和Tafel曲线证明，这种独特的结构有利于提高催化活性，从而将三碘化物还原为碘化物，并降低电极/电解质界面的电荷转移阻力。改变WS 2 / MoTe 2顶层和底层的厚度以获得高DSSC性能。因此，DSSC与优化的WS 2组装在一起/ MoTe 2 CE达到7.99％的高功率转换效率（PCE），与传统的Pt CE（8.50％）及其原始WS 2和MoTe 2 CEs分别相当（分别为6.3％和7.25％）。我们的发现创造了一种准备具有高效能的DSSC的方法。
更新日期：2018-11-06
中文翻译：
开发WS 2 / MoTe 2异质结构作为对电极，以提高染料敏化太阳能电池的性能†
通过溅射-CVD方法在导电玻璃基板上轻松实现了WS 2 / MoTe 2异质结构的大面积合成，并且首次将其用作染料敏化太阳能电池的对电极（CE）（ DSSC）。循环伏安法（CV），电化学阻抗谱（EIS）和Tafel曲线证明，这种独特的结构有利于提高催化活性，从而将三碘化物还原为碘化物，并降低电极/电解质界面的电荷转移阻力。改变WS 2 / MoTe 2顶层和底层的厚度以获得高DSSC性能。因此，DSSC与优化的WS 2组装在一起/ MoTe 2 CE达到7.99％的高功率转换效率（PCE），与传统的Pt CE（8.50％）及其原始WS 2和MoTe 2 CEs分别相当（分别为6.3％和7.25％）。我们的发现创造了一种准备具有高效能的DSSC的方法。
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