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-AVA) iodide through a porous carbon film. The 5-AVA templating created mixed-cation perovskite (5-AVA)(x)(MA)(1-x)PbI3 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 MAPbI(3). The cell achieved a certified power conversion efficiency of 12.8% and was stable for >1000 hours in ambient air under full sunlight.


Published in:
Science, 345, 6194, 295-298
Year:
2014
Publisher:
Washington, American Association for the Advancement of Science
ISSN:
0036-8075
Laboratories:




 Record created 2014-10-23, last modified 2018-09-13


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