In Situ Fabrication of Highly Luminescent Bifunctional Amino Acid Crosslinked 2D/3D NH₃C₄H₉COO(CH₃NH₃PbBr₃)_n Perovskite Films

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• 作者：Taiyang Zhang ; Liqiang Xie ; Liang Chen ; Nanjie Guo ; Ge Li ; Zhongqun Tian ; Bingwei Mao and Yixin Zhao
• 刊名：Advanced Functional Materials
• 出版年：2017
• 出版时间：January 5, 2017
• 年：2017
• 卷：27
• 期：1
• 全文大小：2489K
• ISSN：1616-3028

文摘

The perovskite quantum dots are usually synthesized by solution chemistry and then fabricated into film for device application with some extra process. Here it is reported for the first time to in situ formation of a crosslinked 2D/3D NH₃C₄H₉COO(CH₃NH₃) _nPb_nBr_3n perovskite planar films with controllable quantum confine via bifunctional amino acid crosslinkage, which is comparable to the solution chemistry synthesized CH₃NH₃PbBr₃ quantum dots. These atomic layer controllable perovskite films are facilely fabricated and tuned by addition of bi-functional 5-aminovaleric acid (Ava) of NH₂C₄H₉COOH into regular (CH₃NH₃)PbBr₃ (MAPbBr₃) perovskite precursor solutions. Both the NH₃⁺ and the COO⁻ groups of the zwitterionic amino acid are proposed to crosslink the atomic layer MAPbBr₃ units via PbCOO bond and ion bond between NH₃⁺ and [PbX₆] unit. The characterizations by atomic force microscopy, scanning electron microscopy, Raman, and photoluminescence spectroscopy confirm a successful fabrication of ultrasmooth and stable film with tunable optical properties. The bifunctional crosslinked 2D/3D Ava(MAPbBr₃)_n perovskite films with controllable quantum confine would serve as distinct and promising materials for optical and optoelectronic applications.