Perovskite-Like Organic-Inorganic Hybrid Lead Iodide with a Large Organic Cation Incorporated within the Layers

被引:25
作者
Que, Chen-Jie [1 ]
Mo, Chong-Jiao [1 ]
Li, Zhao-Qi [1 ]
Zhang, Guang-Lin [1 ]
Zhu, Qin-Yu [1 ]
Dai, Jie [1 ]
机构
[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China
关键词
SOLAR-CELLS; PHASE-TRANSITIONS; CRYSTAL-STRUCTURE; LIGHT; PHOTOVOLTAICS; (CNH2N+1NH3)(2)PBI4; TEMPERATURE; ULTRAVIOLET; HALIDES; SHEETS;
D O I
10.1021/acs.inorgchem.6b02550
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A great effort has been made to investigate 2D perovskites to improve the stability and controllability in the fabrication of photoelectronic devices. As far as we know, only small organic cations such as methylammonium can incorporate into the multilayered perovskite structure except the cations sandwiched between the inorganic layers. We report here a new layered lead iodide, (H(2)Aepz)(3)Pb4I14) (1), where larger organic cations, bis-protonated 2-(2-aminoethyl)-pyrazole (Aepz), not only were sandwiched between the inorganic layers but also were incorporated within the perovskite-like PbI layered structure. Another 2D compound, (H(2)Aepz)PbI4 (2), was also prepared that was a one-layer perovskite. A simple Schottky device was prepared to investigate the photoelectroresponsive properties of the compounds in comparison with that of a typical organic inorganic hybrid perovskite. In general, the energy gap is decreased with an increase in the perovskite layers, but the band gap of two-layered 1 is larger than that of one-layered 2. The photocurrent densities of the compounds are in the order of 1 < 2 < (CH3NH3)PbI3, which is discussed based on the crystal structures and band energy gaps.
引用
收藏
页码:2467 / 2472
页数:6
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