Controlled Synthesis of Composition Tunable Formamidinium Cesium Double Cation Lead Halide Perovskite Nanowires and Nanosheets with Improved Stability
Controlled Synthesis of Composition Tunable Formamidinium Cesium Double Cation Lead Halide Perovskite Nanowires and Nanosheets with Improved Stability
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稳定性提高的成分可调甲脒铯双阳离子卤化铅钙钛矿纳米线和纳米片的受控合成
DOI：
10.1021/acs.chemmater.6b04848
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发表时间：
2017-03
影响因子：
8.6
通讯作者：
Zhengtao Deng
中科院分区：
文献类型：
--
作者：
Chuying Wang;Yukang Zhang;Aifei Wang;Qian Wang;Haiyan Tang;Wei Shen;Zhe Li;Zhengtao Deng
卤化铅钙钛矿以其独特的性能在光伏和光电子领域成为一种极具发展前景的新型半导体材料。然而，控制钙钛矿纳米结构的形态和组成，提高稳定性，特别是双阳离子卤化铅钙钛矿，仍然是一个挑战。在这里，我们展示了一种胶体合成方法，可以直接合成稳定的单晶甲酰胺（FA）铯双阳离子卤化铅FA0.33Cs0.67PbBr3-xIx（0≤x≤3）钙钛矿纳米结构，在广泛的卤化物成分中具有可控的形貌，而无需使用以前的阴离子交换过程。在纯铯铅卤化钙钛矿结构的A位上添加FA合金可以稳定纳米晶体，同时在结构和成分之间实现更好的平衡。在FA0.33Cs0.67PbBr3-xIx合金钙钛矿体系的基础上，通过调整参与反应的配体，制备了收率较高的各种卤化物组成的纳米线和纳米片。这些新的钙钛矿纳米结构具有良好的形态和组成，表现出更好的稳定性和荧光和光电子性能，这可能使它们能够在纳米级器件中找到传统半导体纳米结构的替代品。
Lead halide perovskites with well-defined morphology have attracted attention for their unique properties as a promising new class of semiconductor materials in photovoltaics and optoelectronics. However, controlling morphologies and compositions of perovskite nanostructures with improved stability, especially for double cation lead halide perovskite, still remains a challenge. Here, we demonstrate a colloidal synthetic approach for direct synthesis of stable single-crystal formamidinium (FA) cesium double cation lead halide FA0.33Cs0.67PbBr3–xIx (0 ≤ x ≤ 3) perovskite nanostructures with controllable morphology over a wide range of halide compositions, without using a previous anion-exchange process. The presence of FA alloyed in the A site for the pure cesium lead halide perovskite structure can stabilize the nanocrystals while delivering a better balance between structure and composition. On the basis of the FA0.33Cs0.67PbBr3–xIx alloy perovskite system, we achieved nanowires and nanosheets with high yield of various halide compositions by tuning the ligand participating in the reaction. These new perovskite nanostructures with well-defined morphology and compositions demonstrated improved stability and fluorescent and optoelectronic properties, which may allow them to find application as replacements for conventional semiconductor nanostructures in nanoscale devices.
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DOI：
10.1021/acs.chemmater.6b03081
发表时间：
2016-09-27
期刊：
Chemistry of materials : a publication of the American Chemical Society
影响因子：
--
作者：
Imran M;Di Stasio F;Dang Z;Canale C;Khan AH;Shamsi J;Brescia R;Prato M;Manna L
通讯作者：
Manna L
影响因子：
56.9
作者：
McMeekin, David P.;Sadoughi, Golnaz;Snaith, Henry J.
通讯作者：
Snaith, Henry J.
影响因子：
27.8
作者：
Conings, Bert;Drijkoningen, Jeroen;Boyen, Hans-Gerd
通讯作者：
Boyen, Hans-Gerd
影响因子：
10.8
作者：
Protesescu L;Yakunin S;Bodnarchuk MI;Krieg F;Caputo R;Hendon CH;Yang RX;Walsh A;Kovalenko MV
通讯作者：
Kovalenko MV
影响因子：
15
作者：
Kojima, Akihiro;Teshima, Kenjiro;Miyasaka, Tsutomu
通讯作者：
Miyasaka, Tsutomu