Dang Yangyang, Liu Xiaolong, Sun Yajing, Song Jiewu, Hu Wenping, Tao Xutang
Tianjin Key Laboratory of Molecular Optoelectronic Sciences & Department of Chemistry, School of Sciences & Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, P. R. China.
State Key Laboratory of Crystal Materials & Institute of Crystal Materials, Shandong University, No. 27 Shanda South Road, Jinan 250100, P. R. China.
J Phys Chem Lett. 2020 Mar 5;11(5):1689-1696. doi: 10.1021/acs.jpclett.9b03718. Epub 2020 Feb 17.
Motivated by the chirality research of the hybrid halide perovskite, we reported the controllable growth of single crystals of ()-, ()-, and (,)-CHCH(CH)NH (MBA)-based lead (Pb) halide perovskites. The crystal structures were redetermined and further refined to clarify the previously ambiguous crystal structure problems. We further investigated the chiral optical properties of these single crystals including nonlinear optical (NLO) properties and photoluminescence (PL) properties. The as-fabricated ()- and ()-MBAPbBr single crystals not only show notable circular dichroism (CD) signals in the absorption spectra but also exhibit obvious circularly polarized luminescence (CPL) characteristics. The available chiral hybrid perovskite single crystals open up the possibility to study these intrinsic chirality properties for optoelectronic applications.
受混合卤化物钙钛矿手性研究的启发，我们报道了基于（）-、（）-和（，）-CHCH(CH)NH（MBA）的铅（Pb）卤化物钙钛矿单晶的可控生长。重新确定并进一步细化了晶体结构，以澄清先前模糊的晶体结构问题。我们进一步研究了这些单晶的手性光学性质，包括非线性光学（NLO）性质和光致发光（PL）性质。所制备的（）-和（）-MBAPbBr单晶不仅在吸收光谱中显示出显著的圆二色性（CD）信号，而且还表现出明显的圆偏振发光（CPL）特性。现有的手性混合钙钛矿单晶为研究这些用于光电子应用的本征手性性质开辟了可能性。
