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Chiral 2D Perovskites with a High Degree of Circularly Polarized Photoluminescence
ACS Nano ( IF 15.8 ) Pub Date : 2019-03-11 00:00:00 , DOI: 10.1021/acsnano.9b00302 Jiaqi Ma 1 , Chen Fang 1 , Chao Chen 2 , Long Jin 1 , Jiaqi Wang 1 , Shuai Wang 1 , Jiang Tang 2 , Dehui Li 1, 2
ACS Nano ( IF 15.8 ) Pub Date : 2019-03-11 00:00:00 , DOI: 10.1021/acsnano.9b00302 Jiaqi Ma 1 , Chen Fang 1 , Chao Chen 2 , Long Jin 1 , Jiaqi Wang 1 , Shuai Wang 1 , Jiang Tang 2 , Dehui Li 1, 2
Affiliation
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Chiral materials are of particular interest and have a wide range of potential applications in life science, material science, spintronic, and optoelectronic devices. Two-dimensional (2D) hybrid organic–inorganic lead halide perovskites have attracted increasing attention. Incorporating the chiral organic ligands into the layered lead iodide frameworks would introduce strong chirality in pure 2D perovskites for potential applications in circularly polarized light (CPL) emission and detection; nonetheless, studies on those aspects are still in their infancy. Here, we report on the strong CPL emission and sensitive CPL detection in the visible-wavelength range in pure chiral (R-/S-MBA)2PbI4 (MBA = C6H5C2H4NH3) 2D perovskites, which are successfully synthesized with a needle shape and millimeter size by incorporating the chiral molecules. The chiral 2D perovskites (R-MBA)2PbI4 and (S-MBA)2PbI4 exhibit an average degree of circularly polarized photoluminescence (PL) of 9.6% and 10.1% at 77 K, respectively, and a maximum degree of the circularly polarized PL of 17.6% is achieved in (S-MBA)2PbI4. The degree of circularly polarized PL dramatically decreases with increasing temperature, implying that the lattice distortion induced by the incorporated chiral molecules and/or temperature-dependent spin flipping might be the origin for the observed chirality. Finally, CPL detection has been achieved with decent performance in our chiral 2D perovskite microplate/MoS2 heterostructural devices. The high degree of the circularly polarized PL and excellent CPL detection together with the layered nature of pure chiral 2D perovskites enables them to be a class of very promising materials for developing and exploring spin associated electronic devices based on the chiral 2D perovskites.
中文翻译：
高度圆偏振光致发光的手性2D钙钛矿
手性材料特别受关注，并且在生命科学，材料科学，自旋电子学和光电子器件中具有广泛的潜在应用。二维（2D）杂化有机-无机卤化铅钙钛矿受到了越来越多的关注。将手性有机配体结合到层状碘化铅骨架中，将在纯2D钙钛矿中引入强手性，可用于圆偏振光（CPL）发射和检测中。尽管如此，关于这些方面的研究仍处于起步阶段。（在这里，我们在可见光波长范围中纯的手性强CPL发射和敏感CPL检测报告- [R - /小号-MBA）2碘化铅4（MBA = C 6 ħ5 C 2 H 4 NH 3）2D钙钛矿，通过结合手性分子成功地合成了针状和毫米大小的钙钛矿。手性2D钙钛矿（ř -MBA）2碘化铅4和（小号-MBA）2碘化铅4表现出的平均度圆偏振的光致发光的9.6％和10.1％（PL）在分别为77 K，和的最大程度的17.6％的圆偏振光PL在（实现小号-MBA）2碘化铅4。圆极化PL的程度随着温度的升高而显着降低，这意味着所掺入的手性分子和/或温度相关的自旋翻转引起的晶格畸变可能是观察到的手性的起源。最终，在我们的手性二维钙钛矿微孔板/ MoS 2异质结构设备中，CPL检测已获得不错的性能。高度的圆极化PL和出色的CPL检测以及纯手性2D钙钛矿的层状性质使它们成为开发和研究基于手性2D钙钛矿的自旋相关电子设备的一类非常有前途的材料。
更新日期：2019-03-11
中文翻译：
高度圆偏振光致发光的手性2D钙钛矿
手性材料特别受关注，并且在生命科学，材料科学，自旋电子学和光电子器件中具有广泛的潜在应用。二维（2D）杂化有机-无机卤化铅钙钛矿受到了越来越多的关注。将手性有机配体结合到层状碘化铅骨架中，将在纯2D钙钛矿中引入强手性，可用于圆偏振光（CPL）发射和检测中。尽管如此，关于这些方面的研究仍处于起步阶段。（在这里，我们在可见光波长范围中纯的手性强CPL发射和敏感CPL检测报告- [R - /小号-MBA）2碘化铅4（MBA = C 6 ħ5 C 2 H 4 NH 3）2D钙钛矿，通过结合手性分子成功地合成了针状和毫米大小的钙钛矿。手性2D钙钛矿（ř -MBA）2碘化铅4和（小号-MBA）2碘化铅4表现出的平均度圆偏振的光致发光的9.6％和10.1％（PL）在分别为77 K，和的最大程度的17.6％的圆偏振光PL在（实现小号-MBA）2碘化铅4。圆极化PL的程度随着温度的升高而显着降低，这意味着所掺入的手性分子和/或温度相关的自旋翻转引起的晶格畸变可能是观察到的手性的起源。最终，在我们的手性二维钙钛矿微孔板/ MoS 2异质结构设备中，CPL检测已获得不错的性能。高度的圆极化PL和出色的CPL检测以及纯手性2D钙钛矿的层状性质使它们成为开发和研究基于手性2D钙钛矿的自旋相关电子设备的一类非常有前途的材料。
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