Low-dimensional halide perovskites(HPs)have received considerable attention in recent years due to their novel physical properties such as compositional flexibility,high quantum yield,quantum size effects and superior...Low-dimensional halide perovskites(HPs)have received considerable attention in recent years due to their novel physical properties such as compositional flexibility,high quantum yield,quantum size effects and superior charge transport.Here we show room temperature solution synthesis of 1D organic-inorganic lead bromide perovskite microwires(MWs).Our method uses acetone as a reactant,and when CH3NH3PbBr3 is immersed,acetone reacts with CH3NH3+cations in the CH3NH3PbBr3 single crystal by the dehydration condensation.The reaction generates a large(CH3)2C=NHCH3+A-site which cannot be accommodated by the cuboctahedron formed by the corner-sharing[PbBr6]4−octahedral,leading to the transition of corner-sharing octahedra to face-sharing triangular prism and the crystal structure transformation from 3D to 1D.The formation process of(CH3)2C=NHCH3PbBr3 MWs does not involve any ligands,templates or catalysts.A two-terminal memory device was constructed using the(CH3)2C=NHCH3PbBr3 MWs,showing great potential of the method in fabrication of electronic and optoelectronic devices.展开更多
An efficient panchromatic planar perovskite solar cell is developed based on highly uniform,lead-reduced CH3NH3Sn0.5Pb0.5I3 perovskite films with full film-coverage on the substrates.We demonstrate here that full-cove...An efficient panchromatic planar perovskite solar cell is developed based on highly uniform,lead-reduced CH3NH3Sn0.5Pb0.5I3 perovskite films with full film-coverage on the substrates.We demonstrate here that full-coverage of the CH3NH3Sn0.5Pb0.5I3 films can be developed by a facile chlorobenzene-assisted spin-coating method.A power conversion efficiency of 7 % is achieved using low-temperature processes,which is among the best-reported performance for panchromatic planar perovskite solar cells with a light-absorption over 1,000 nm.展开更多
基金This work was supported by the National Key Research and Development Program of China (Grant No. 2018YFB0406704)the National Natural Science Foundation of China (Grant No. 61964011)+1 种基金the Natural Science Foundation of Jiangxi Province (Grant Nos. 20165BCB18004 and 20171BCB23005)the Nanchang University Graduate Innovation Special Funding (Grant No. CX2019054).
文摘Low-dimensional halide perovskites(HPs)have received considerable attention in recent years due to their novel physical properties such as compositional flexibility,high quantum yield,quantum size effects and superior charge transport.Here we show room temperature solution synthesis of 1D organic-inorganic lead bromide perovskite microwires(MWs).Our method uses acetone as a reactant,and when CH3NH3PbBr3 is immersed,acetone reacts with CH3NH3+cations in the CH3NH3PbBr3 single crystal by the dehydration condensation.The reaction generates a large(CH3)2C=NHCH3+A-site which cannot be accommodated by the cuboctahedron formed by the corner-sharing[PbBr6]4−octahedral,leading to the transition of corner-sharing octahedra to face-sharing triangular prism and the crystal structure transformation from 3D to 1D.The formation process of(CH3)2C=NHCH3PbBr3 MWs does not involve any ligands,templates or catalysts.A two-terminal memory device was constructed using the(CH3)2C=NHCH3PbBr3 MWs,showing great potential of the method in fabrication of electronic and optoelectronic devices.
基金Financial support from the CRC for Polymers,established under the Cooperative Research Centres ProgrammeAustralian Research Council Discovery Projects (ARC DPs)+1 种基金Future Fellowship (FT) programs are acknowledgedthe support from International Postgraduate Research Scholarship (IPRS)
文摘An efficient panchromatic planar perovskite solar cell is developed based on highly uniform,lead-reduced CH3NH3Sn0.5Pb0.5I3 perovskite films with full film-coverage on the substrates.We demonstrate here that full-coverage of the CH3NH3Sn0.5Pb0.5I3 films can be developed by a facile chlorobenzene-assisted spin-coating method.A power conversion efficiency of 7 % is achieved using low-temperature processes,which is among the best-reported performance for panchromatic planar perovskite solar cells with a light-absorption over 1,000 nm.
