An efficient electron transport material of tin oxide for planar structure perovskite solar cells

JOURNAL OF POWER SOURCES

卷:307

Article

Murugadoss, Govindhasamy^1,2  Kanda, Hiroyuki¹  Tanaka, Soichiro¹  Nishino, Hitoshi³  Ito, Seigo¹  Imahoric, Hiroshi^3,4  Umeyama, Tomokazu⁵ 

[1] Univ Hyogo, Sch Engn, Dept Elect Engn & Comp Sci, 2167 Shosha, Himeji, Hypogo 6712280, Japan

[2] CSIR Cent Electrochem Res Inst, Electrochem Mat Sci Div, Karaikkudi 630006, Tamil Nadu, India

[3] Osaka Gas Co Ltd, Energy Technol Labs, 6-19-9 Konohana Ku, Osaka 5540051, Japan

[4] Kyoto Univ, Inst Integrated Cell Mat Sci WPI iCeMS, Nishikyo Ku, Kyoto 6158510, Japan

[5] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Nishikyo Ku, Kyoto 6158510, Japan

关键词: SnO2;    CuSCN;    Perovskite;    Planar structure;    Two-step process;   

DOI  :  10.1016/j.jpowsour.2016.01.044

来源: Elsevier

【 摘 要 】

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.

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