An efficient electron transport material of tin oxide for planar structure perovskite solar cells
An efficient electron transport material of tin oxide for planar structure perovskite solar cells
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DOI：
10.1016/j.jpowsour.2016.01.044
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发表时间：
2016-03-01
影响因子：
9.2
通讯作者：
Umeyama, Tomokazu
中科院分区：
文献类型：
--
作者：
Murugadoss, Govindhasamy;Kanda, Hiroyuki;Umeyama, Tomokazu
研究了用不同溶剂低温制备的新型电子导电SnO2薄膜的钙钛矿型太阳能电池的光伏性能。由于SnO2具有比TiO2更好的增透性能、更高的电子迁移率、更合适的带边和更宽的带隙等性能，因此被选为电子导电介质。通过旋涂SnCl2溶液，然后在200℃的空气中进行热处理，得到了SnO2层。低温(200℃)退火后的SnO2层表现出更强的结晶度、更高的透过率和更均匀的表面形态，使用乙醇代替水作为溶剂。为了降低器件成本，采用了固态CuSCN空穴导体作为HTM。用CH3NH3PbI3钙钛矿掺杂SnO2制备的平面太阳电池的功率转换效率为8.38%，短路电流密度为18.99 mA cm(-2)，开路电压为0.96 mV，填充因子为45%。这些器件是在室温下60%的湿度水平下制造的。结果表明，SnO2是CH3NH3PbI3基平面钙钛矿太阳电池的一种有效的电荷收集体系。此外，这些结果还为未来采用新的电子导电层的钙钛矿型太阳能电池的改进提供了新的方向。(C)2016爱思唯尔B.V.保留所有权利。
The photovoltaic performance of a perovskite solar cell based on a new electron conducting SnO2 film prepared at low temperature using different solvents was investigated. SnO2 was selected as an electron conducting medium due to its superior properties over TiO2, such as better antireflective properties, higher electron mobility, more suitable band edges and a wider band gap. A SnO2 layer was developed by spin-coating SnCl2 solution followed by annealing at 200 degrees C in air. The low-temperature (200 degrees C) annealed SnO2 layer exhibits enhanced crystallization, high transmittance, and uniform surface morphology using ethanol as a solvent rather than water. Solid state CuSCN hole conductor was used as HTM for reducing the device cost. A planar solar cell fabricated with CH3NH3PbI3 perovskite infiltrated SnO2 showed a power conversion efficiency of 8.38% with short-circuit current density of 18.99 mA cm(-2), an open-circuit voltage of 0.96 mV and a fill factor of 45%. The devices were fabricated at >60% humidity level at room temperature. The results suggest that SnO2 is an effective charge collection system for CH3NH3PbI3 based planar perovskite solar cells. In addition, these results provide a new direction for the future improvement of perovskite solar cells using new electron conducting layers. (C) 2016 Elsevier B.V. All rights reserved.