Journal
SCIENCE
Volume 345, Issue 6194, Pages 295-298Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1254763
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Funding
- Ministry of Science and Technology of China (863 project) [SS2013AA50303]
- National Natural Science Foundation of China [61106056]
- Science and Technology Department of Hubei Province [2013BAA090]
- Fundamental Research Funds for the Central Universities [HUSTNY022]
- European Research Council [ARG 247404]
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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.
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