The CH3NH3PbI3（MAPbI3）perovskite was usually prepared by high-purity PbI2 with high cost.The low cost and low-purity PbI2 was seldom reported for fabrication of MAPW3 because it cannot even dissolve well in widely a...The CH3NH3PbI3（MAPbI3）perovskite was usually prepared by high-purity PbI2 with high cost.The low cost and low-purity PbI2 was seldom reported for fabrication of MAPW3 because it cannot even dissolve well in widely adopted solvent of DMF.We developed an easy method to adapt low-purity PbI2 for fabrication of high quality MAPbI3 just by the simple addition of some hydrochloric acid into the mixture of low-purity PbI2,MAI and DMF.This straightforward method can not only help dissolve the low quality PbI2 by reacting with some impurities in DMF,but also lead to a successful fabrication of high-quality perovskite solar cells with up to 14.80%efficiency comparable to the high quality PbI2 precursors.展开更多
基金Project supported by the National Natural Science Foundation of China(Nos.51372151,21303103)Houyingdong Grant(No.151046)
文摘The CH3NH3PbI3（MAPbI3）perovskite was usually prepared by high-purity PbI2 with high cost.The low cost and low-purity PbI2 was seldom reported for fabrication of MAPW3 because it cannot even dissolve well in widely adopted solvent of DMF.We developed an easy method to adapt low-purity PbI2 for fabrication of high quality MAPbI3 just by the simple addition of some hydrochloric acid into the mixture of low-purity PbI2,MAI and DMF.This straightforward method can not only help dissolve the low quality PbI2 by reacting with some impurities in DMF,but also lead to a successful fabrication of high-quality perovskite solar cells with up to 14.80%efficiency comparable to the high quality PbI2 precursors.
