A hole-conductor-free, fully printable mesoscopic perovskite solar cell with high stability

We fabricated a perovskite solar cell that uses a double layer of mesoporous TiO2 and ZrO2 as a scaffold infiltrated with perovskite and does not require a hole-conducting layer. The perovskite was produced by drop-casting a solution of PbI2, methylammonium (MA) iodide, and 5-ammoniumvaleric acid (5...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2014-07, Vol.345 (6194), p.295-298
Main Authors: Mei, Anyi, Li, Xiong, Liu, Linfeng, Ku, Zhiliang, Liu, Tongfa, Rong, Yaoguang, Xu, Mi, Hu, Min, Chen, Jiangzhao, Yang, Ying, Grätzel, Michael, Han, Hongwei
Format: Article
Language:English
Subjects:
Aluminum
Boundary layer
Cations
Cells
Perovskite
Perovskites
Photovoltaic cells
Solar cells
Solar cycle
Titanium
Walls
Zirconium oxides
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Summary:We fabricated a perovskite solar cell that uses a double layer of mesoporous TiO2 and ZrO2 as a scaffold infiltrated with perovskite and does not require a hole-conducting layer. The perovskite was produced by drop-casting a solution of PbI2, methylammonium (MA) iodide, and 5-ammoniumvaleric acid (5-AVA) iodide through a porous carbon film. The 5-AVA templating created mixed-cation perovskite (5-AVA)x(MA)1-xPbI3 crystals with lower defect concentration and better pore filling as well as more complete contact with the TiO2 scaffold, resulting in a longer exciton lifetime and a higher quantum yield for photoinduced charge separation as compared to MAPbI3. The cell achieved a certified power conversion efficiency of 12.8% and was stable for >1000 hours in ambient air under full sunlight.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1254763