低次元有機・無機ハイブリッドペロブスカイト単結晶の作製と熱電変換特性の計測

自捕获激子（STEs）广泛用于低维混合钙钛矿的宽带发射，在白光LED转换器件中具有应用潜力。提出了两种混合钙钛矿的宽带发射模型。有机分子在吸收-发射过程中的作用以及无机骨架对发射机制的影响尚不清楚。了解有机分子和无机部分对STEs现象影响的有效途径之一是检测基于不同分子的各种结构的光学性质。各种一维杂化钙钛矿结构的单晶是研究相变晶体的良好候选者，可以阐明有机分子和结构在相变晶体生成中的作用。本文研究了四种碘化铅一维化合物的光致发光光谱和时间分辨光谱。在低温下，化合物1DI-4McPy表现出两个宽带发射，分别为2.36和1.73 eV，这两个宽带发射分别属于无机链和有机部分畸变引起的STE。这些结果为进一步研究一维杂化钙钛矿的吸收和发射机理奠定了良好的基础。

Self trapped exciton (STEs) are widely assigned for broadband emissions in low-dimensional hybrid perovskite which promises application potential in white LED light conversion devices. Two models have been proposed for broadband emission in hybrid perovskite. The role of the organic molecules in the absorption-emission process and the effect of the inorganic framework on the emission mechanism remains unclear. One of the effective ways to understand the influence of organic molecule and inorganic part in the STEs phenomenon is to exam the optical properties of various structures based on different molecules. Single crystals of various 1D hybrid perovskite structures are good candidates for examining STEs to illuminate the roles of organic molecules and structure in the generation of STEs. In this work, the photoluminescence (PL) and time-resolved PL spectra of the four lead iodide 1D compounds were studied. The compounds exhibited a broadband emission with a large Stokes shift assigned to STE in the organic molecules following the model I. At low temperatures, compound 1DI-4McPy exhibited two broadband emissions at 2.36 and 1.73 eV which would be assigned to STEs arising from distortion in the inorganic chain and organic part, respectively. These results are a good foundation for further investigation into the absorption and emission mechanisms of 1D hybrid perovskite.