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Charge-Carrier Dynamics and Crystalline Texture of Layered Ruddlesden–Popper Hybrid Lead Iodide Perovskite Thin Films
ACS Energy Letters ( IF 19.3 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1021/acsenergylett.7b01245 Naveen R. Venkatesan 1 , John G. Labram 1 , Michael L. Chabinyc 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1021/acsenergylett.7b01245 Naveen R. Venkatesan 1 , John G. Labram 1 , Michael L. Chabinyc 1
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Solution-processable organic metal halide Ruddlesden–Popper phases have shown promise in optoelectronics because of their efficiencies in solar cells along with increased material stability relative to their three-dimensional counterparts (CH3NH3PbI3). Here, we study the layered material butylammonium methylammonium lead iodide (C4H9NH3)2(CH3NH3)n−1PbnI3n+1 for values of n ranging from 1 to 4. Thin films cast from solution show a gradual change in the crystalline texture of the two-dimensional lead iodide layers from being parallel to the substrate to perpendicular with increasing n. Contactless time-resolved microwave conductivity measurements show that the average recombination rate order increases with n and that the yield–mobility products and carrier lifetimes of these thin films are much lower than that of CH3NH3PbI3, along with increased higher-order recombination rate constants.
中文翻译：
层状Ruddlesden-Pop混合碘化钙钛矿型钙钛矿薄膜的电荷载流子动力学和晶体织构
可溶液加工的有机金属卤化物Ruddlesden–Popper相在光电领域已显示出希望，因为它们在太阳能电池中的效率以及相对于其三维对应物（CH 3 NH 3 PbI 3）的材料稳定性更高。在这里，我们研究层状材料丁基铵甲基铵碘化铅（C 4 H 9 NH 3）2（CH 3 NH 3）n -1 Pb n I 3 n +1的n值溶液流延的薄膜范围从1到4。随着n的增加，二维碘化铅层的晶体织构从与基板平行逐渐变为垂直。非接触时间分辨的微波电导率测量结果表明，平均复合速率阶数随n的增加而增加，这些薄膜的产率-迁移率乘积和载流子寿命远低于CH 3 NH 3 PbI 3，并具有更高的阶次重组率常数。
更新日期：2018-01-17
中文翻译：
层状Ruddlesden-Pop混合碘化钙钛矿型钙钛矿薄膜的电荷载流子动力学和晶体织构
可溶液加工的有机金属卤化物Ruddlesden–Popper相在光电领域已显示出希望，因为它们在太阳能电池中的效率以及相对于其三维对应物（CH 3 NH 3 PbI 3）的材料稳定性更高。在这里，我们研究层状材料丁基铵甲基铵碘化铅（C 4 H 9 NH 3）2（CH 3 NH 3）n -1 Pb n I 3 n +1的n值溶液流延的薄膜范围从1到4。随着n的增加，二维碘化铅层的晶体织构从与基板平行逐渐变为垂直。非接触时间分辨的微波电导率测量结果表明，平均复合速率阶数随n的增加而增加，这些薄膜的产率-迁移率乘积和载流子寿命远低于CH 3 NH 3 PbI 3，并具有更高的阶次重组率常数。
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