A One-Dimensional Broadband Emissive Hybrid Lead Iodide with Face-Sharing PbI6 Octahedral Chains,Inorganic Chemistry

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A One-Dimensional Broadband Emissive Hybrid Lead Iodide with Face-Sharing PbI6 Octahedral Chains
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-10-06 , DOI: 10.1021/acs.inorgchem.1c02732
Zhikai Qi ₁ , Huizhi Gao ₁ , Xuelian Yang ₁ , Yali Chen ₁ , Fu-Qiang Zhang ₁ , Mei Qu ₁ , Shi-Li Li ₁ , Xian-Ming Zhang _{1,

2}

Affiliation

One-dimensional (1D) organic–inorganic hybrid lead halides with unique core–shell quantum wire structures and splendid photoluminescence properties have been considered one of the most promising high-efficiency broadband emitters. However, studies on the broadband emissions in 1D purely face-shared lead iodide hybrids are still rare so far. Herein, we report on a new 1D lead iodide hybrid, (2cepyH)PbI₃ (2cepy = 1-(2-chloroethyl)pyrrolidine), characterized with face-sharing PbI₆ octahedral chains. Upon UV photoexcitation, this material shows broadband yellow emissions originating from the self-trapped excitons associated with distorted Pb–I lattices on account of the strong exciton–phonon coupling, as proved by variable-temperature emission spectra. Moreover, experimental and calculated results reveal that (2cepyH)PbI₃ is an indirect bandgap semiconductor, the band structures of which are governed by inorganic parts. Our work represents the first broadband emitter based on a 1D face-shared lead iodide hybrid and opens a new way to obtain the novel broadband emission materials.

中文翻译：

具有面共享 PbI6 八面体链的一维宽带发射混合碘化铅

一维（1D）有机-无机杂化卤化铅具有独特的核-壳量子线结构和出色的光致发光特性，被认为是最有前途的高效宽带发射器之一。然而，到目前为止，对一维纯面共享碘化铅混合体中宽带发射的研究仍然很少见。在此，我们报告了一种新的一维碘化铅杂化物，(2cepyH)PbI ₃ (2cepy = 1-(2-氯乙基)吡咯烷)，其特征在于共享面 PbI ₆八面体链。在紫外光激发下，由于强激子 - 声子耦合，这种材料显示出宽带黄色发射，源自与扭曲的 Pb-I 晶格相关的自陷激子，正如可变温度发射光谱所证明的那样。此外，实验和计算结果表明，(2cepyH)PbI ₃是一种间接带隙半导体，其能带结构由无机部分控制。我们的工作代表了第一个基于一维面共享碘化铅混合体的宽带发射器，并开辟了获得新型宽带发射材料的新途径。

更新日期：2021-10-18

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