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In Situ Growth of MAPbBr3 Nanocrystals on Few-Layer MXene Nanosheets with Efficient Energy Transfer.
Small ( IF 13.0 ) Pub Date : 2020-03-29 , DOI: 10.1002/smll.201905896 Zhipeng Zhang 1 , Ying Li 2 , Chao Liang 1 , Guannan Yu 2 , Jiafu Zhao 3 , Shaojuan Luo 2, 3 , Yang Huang 4 , Chenliang Su 2 , Guichuan Xing 1
Small ( IF 13.0 ) Pub Date : 2020-03-29 , DOI: 10.1002/smll.201905896 Zhipeng Zhang 1 , Ying Li 2 , Chao Liang 1 , Guannan Yu 2 , Jiafu Zhao 3 , Shaojuan Luo 2, 3 , Yang Huang 4 , Chenliang Su 2 , Guichuan Xing 1
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The performance of perovskite nanocrystals (NCs) in optoelectronics and photocatalysis is severely limited by the presence of large amounts of crystal boundaries in NCs film that greatly restricts energy transfer. Creating heterostructures based on perovskite NCs and 2D materials is a common approach to improve the energy transport at the perovskite/2D materials interface. Herein, methylamine lead bromide (MAPbBr3 , MA: CH3 NH3 + ) perovskite NCs are homogeneously deposited on highly conductive few-layer MXene (Ti3 C2 Tx ) nanosheets to form heterostructures through an in situ solution growth method. An optimal mixed solvent ratio is essential to realize the growth of perovskite NCs on Ti3 C2 Tx nanosheets. Time-resolved photoluminescence spectroscopy, transient absorption spectroscopy, and the photoresponse of electron- and hole-only photoelectric conversion devices reveal the interfacial energy transfer behavior within MAPbBr3 /Ti3 C2 Tx heterostructures. The present investigation may provide a useful guide toward use of halide perovskite/2D material heterostructures in applications such as photocatalysis as well as optoelectronics.
中文翻译：
MAPbBr3纳米晶体在几层MXene纳米片上的原位生长，具有高效的能量转移。
钙钛矿纳米晶体（NCs）在光电和光催化领域的性能受到NCs薄膜中大量晶界的严重限制，这极大地限制了能量转移。基于钙钛矿NC和2D材料创建异质结构是改善钙钛矿/ 2D材料界面处能量传输的常用方法。在此，将甲胺溴化铅（MAPbBr3，MA：CH3 NH3 +）钙钛矿NCs均匀沉积在高导电性的几层MXene（Ti3 C2 Tx）纳米片上，通过原位溶液生长方法形成异质结构。最佳的混合溶剂比例对于实现钙钛矿NCs在Ti3 C2 Tx纳米片上的生长至关重要。时间分辨光致发光光谱，瞬态吸收光谱，仅电子和空穴的光电转换装置的光响应揭示了MAPbBr3 / Ti3 C2 Tx异质结构内的界面能量转移行为。本研究可为在诸如光催化以及光电子学等应用中使用卤化钙钛矿/ 2D材料异质结构提供有用的指导。
更新日期：2020-04-22
中文翻译：
MAPbBr3纳米晶体在几层MXene纳米片上的原位生长，具有高效的能量转移。
钙钛矿纳米晶体（NCs）在光电和光催化领域的性能受到NCs薄膜中大量晶界的严重限制，这极大地限制了能量转移。基于钙钛矿NC和2D材料创建异质结构是改善钙钛矿/ 2D材料界面处能量传输的常用方法。在此，将甲胺溴化铅（MAPbBr3，MA：CH3 NH3 +）钙钛矿NCs均匀沉积在高导电性的几层MXene（Ti3 C2 Tx）纳米片上，通过原位溶液生长方法形成异质结构。最佳的混合溶剂比例对于实现钙钛矿NCs在Ti3 C2 Tx纳米片上的生长至关重要。时间分辨光致发光光谱，瞬态吸收光谱，仅电子和空穴的光电转换装置的光响应揭示了MAPbBr3 / Ti3 C2 Tx异质结构内的界面能量转移行为。本研究可为在诸如光催化以及光电子学等应用中使用卤化钙钛矿/ 2D材料异质结构提供有用的指导。
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