Highly qualified copper-indium sulfide colloids prepared in water under microwave irradiation and their applications to the TiO2 based quantum dot-sensitized solar cells
Highly qualified copper-indium sulfide colloids prepared in water under microwave irradiation and their applications to the TiO2 based quantum dot-sensitized solar cells
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DOI：
10.1016/j.solmat.2017.05.005
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发表时间：
2017-09
影响因子：
6.9
通讯作者：
S. Higashimoto;Makoto Murano;Taisuke Arase;Shun Mukai;M. Azuma;Masanari Takahashi
中科院分区：
文献类型：
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作者：
S. Higashimoto;Makoto Murano;Taisuke Arase;Shun Mukai;M. Azuma;Masanari Takahashi
本文展示了一种采用高品质的铜-铟-硫化物 (CIS) 三元胶体来提高 TiO2 基太阳能电池性能的简单策略。在“绿色”水介质中制备了不同 In/Cu 比例为 1-4 并用巯基乙酸 (TGA) 封端的 CIS 胶体。随后，CIS 胶体溶液在不同温度（80-200℃）下用微波（MW）照射 5 分钟。采用 In/Cu 比为 2 的 CIS 胶体在 160℃ 下处理的优选太阳能电池表现出较高的光转换效率 (PCE)，产率为 6.12%（短路电流：14.0 mA/cm2，开路电压：0.91 V，填充因子：48.0%）。据我们所知，该值是采用水介质中制备的 CIS 胶体的太阳能电池中最高的。还证实，MW 辐射改善了 CIS 胶体的光吸收，并且由于 CIS 胶体中涉及的缺陷位点的减少而诱导了 CIS-TiO2 光电极费米能级的光电化学阴极位移。
This paper demonstrates a straightforward strategy to improve the TiO2-based solar cell performances employing highly qualified copper-indium-sulfide (CIS) ternary colloids. The CIS colloids in different In/Cu ratios of 1–4 capped with thioglycolic acid (TGA) were prepared in “green” water media. And, subsequently the CIS colloidal solutions were treated with microwave (MW)-irradiation at different temperatures (80–200 ℃) for 5 min. The preferable solar cell employing CIS colloids in In/Cu ratio of 2 treated at 160 ℃ showed high photo-conversion efficiency (PCE) yielding with 6.12% (short-circuit current: 14.0 mA/cm2, open-circuit voltage: 0.91 V and fill factor: 48.0%). To our best knowledge, this value is the highest among the solar cells employing CIS colloids prepared in water media. It was also confirmed that the MW-irradiation improved the light absorption of the CIS colloids as well as induced photo-electrochemical cathodic shift of the Fermi levels for the CIS-TiO2photoelectrode due to the reduction of defective sites involved in the CIS colloids.