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Incorporating an Aromatic Cationic Spacer to Assemble 2D Polar Perovskite Crystals toward Self-Powered Detection of Quite Weak Polarized Light
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2022-06-24 , DOI: 10.1021/acs.jpclett.2c01435 Xinxin Hu 1, 2 , Haojie Xu 1, 2 , Yi Liu 1, 2 , Lei Lu 1 , Wuqian Guo 1, 2 , Shiguo Han 1 , Junhua Luo 1 , Zhihua Sun 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2022-06-24 , DOI: 10.1021/acs.jpclett.2c01435 Xinxin Hu 1, 2 , Haojie Xu 1, 2 , Yi Liu 1, 2 , Lei Lu 1 , Wuqian Guo 1, 2 , Shiguo Han 1 , Junhua Luo 1 , Zhihua Sun 1
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Two-dimensional (2D) hybrid perovskites with intrinsic attributes of structural and optical anisotropy are holding a bright promise for polarization-sensitive photodetection. However, studies on self-powered detection to quite weak polarized light remain scarce in this 2D family. By incorporating an aromatic spacer into the 3D cubic prototype, we have successfully assembled a new 2D hybrid perovskite with a polar motif, (FPEA)2(MA)Pb2I7 (FMPI, where FPEA is 4-fluorophenethylammonium and MA is methylammonium). Its unique 2D quantum-well structure allows optical absorption dichroism with a large ratio of ∼3.15, and the natural polarity results in a notable bulk photovoltaic effect. Further, centimeter-size crystals (10 × 10 × 3 mm3) of FMPI were facilely obtained by the temperature cooling method, and its crystal-based detectors enable excellent self-powered detection of quite weak polarized light, showing a notable polarization-sensitive ratio (∼1.5), extremely low detection limit (∼100 nW/cm2), and antifatigued stability. The alloyed aromatic cationic spacers facilitate the polarity and enhanced phase stability. This study paves a way for further exploration of new 2D perovskite candidates toward optoelectronic device applications.
中文翻译：
结合芳族阳离子间隔物组装二维极性钙钛矿晶体，以自供电检测相当弱的偏振光
具有结构和光学各向异性的内在属性的二维 (2D) 杂化钙钛矿为偏振敏感光电探测提供了光明的前景。然而，在这个二维家族中，对相当弱的偏振光进行自供电检测的研究仍然很少。通过在 3D 立方原型中加入芳香族间隔基，我们成功组装了具有极性基序的新型 2D 杂化钙钛矿，(FPEA) 2 (MA)Pb 2 I 7 ( FMPI，其中 FPEA 是 4-氟苯乙基铵，MA 是甲基铵) . 其独特的二维量子阱结构允许具有~3.15 的大比率的光吸收二色性，并且自然极性导致显着的体光伏效应。此外，厘米大小的晶体（10 × 10 × 3 毫米FMPI 3）通过温度冷却法轻松获得，其基于晶体的探测器能够出色地自供电检测相当弱的偏振光，显示出显着的偏振敏感比（~1.5），极低的检测限（~100 nW/cm 2 )和抗疲劳稳定性。合金化的芳族阳离子间隔有利于极性和增强的相稳定性。这项研究为进一步探索新的二维钙钛矿候选材料在光电器件应用方面铺平了道路。
更新日期：2022-06-24
中文翻译：
结合芳族阳离子间隔物组装二维极性钙钛矿晶体，以自供电检测相当弱的偏振光
具有结构和光学各向异性的内在属性的二维 (2D) 杂化钙钛矿为偏振敏感光电探测提供了光明的前景。然而，在这个二维家族中，对相当弱的偏振光进行自供电检测的研究仍然很少。通过在 3D 立方原型中加入芳香族间隔基，我们成功组装了具有极性基序的新型 2D 杂化钙钛矿，(FPEA) 2 (MA)Pb 2 I 7 ( FMPI，其中 FPEA 是 4-氟苯乙基铵，MA 是甲基铵) . 其独特的二维量子阱结构允许具有~3.15 的大比率的光吸收二色性，并且自然极性导致显着的体光伏效应。此外，厘米大小的晶体（10 × 10 × 3 毫米FMPI 3）通过温度冷却法轻松获得，其基于晶体的探测器能够出色地自供电检测相当弱的偏振光，显示出显着的偏振敏感比（~1.5），极低的检测限（~100 nW/cm 2 )和抗疲劳稳定性。合金化的芳族阳离子间隔有利于极性和增强的相稳定性。这项研究为进一步探索新的二维钙钛矿候选材料在光电器件应用方面铺平了道路。
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