Direct patterning of methylammonium lead bromide perovskites by thermal imprint
Direct patterning of methylammonium lead bromide perovskites by thermal imprint
复制标题
通过热压印直接图案化甲铵溴化铅钙钛矿
DOI：
10.1007/s00339-022-05521-0
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
H.-C. Scheer
中科院分区：
文献类型：
--
作者：
A. Mayer;T. Haeger;M. Runkel;J. Rond;J. Staabs;F. van gen Hassend;P. Görrn;T. Riedl;H.-C. Scheer
有前景的新材料如可溶液加工的钙钛矿可以提供具有上级性质的器件，例如用于光电子学。对于一些应用，需要图案化，并且纳米压印作为无溶剂的机械成形工艺已被确定为特别有利于该目的。目前的研究是指有机-无机钙钛矿甲基铵溴化铅（MAPbBr 3），并涉及在压力和温度下的直接压印。不同晶粒尺寸的单晶和多晶层的实验表明，大晶粒的起始层为微/纳米结构的复制提供了最佳的先决条件。本研究的目的是开发一个物理的理解与这种多晶材料的成型过程。为了发展这样一个概念，多晶钙钛矿的印记和热塑性聚合物的印记之间的类比被寻求，并计算出微观材料响应的差异所导致的后果。钙钛矿的主要方面是塑性变形由于在晶体学滑动面上滑动而发生，类似于金属的情况。对于< 100 >取向的钙钛矿层，压印压力激活（110）< 110 >型滑移系统，提供相对于表面法线成45°的材料输送。这个优先方向的后果进行了研究，通过分析实验与部分和完全填充用于压印的印模的空腔。通过考虑初始印记阶段的几何相关性，可以理解实验结果。除此之外，事实证明，在特定条件下，颗粒的大小和形状可以通过压印图案来控制。这种“通过图案化进行颗粒成形”为钙钛矿层的纳米压印提供了意想不到的创新前景。
Promising new materials like solution-processable perovskites may provide devices with superior properties, e.g. for opto-electronics. For some applications patterning is required and nanoimprint as a solvent-free, mechanical shaping process has been identified to be particularly favorable for this purpose. The current investigation refers to the organic–inorganic perovskite methylammonium lead bromide (MAPbBr3) and is related to direct imprint under pressure and temperature. Experiments with a single crystal and polycrystalline layers of differing grain size indicate that a large-grained starting layer offers optimum pre-conditions for the replication of micro/nano-structures. The aim of the present study is to develop a physical understanding of the shaping process with this polycrystalline material. To develop such a conception, analogies between the imprint of polycrystalline perovskites and the imprint of thermoplastic polymers are sought, and the consequences resulting from the differences in the microscopic material response are worked out. The main aspect with perovskites is that plastic deformation occurs due to gliding on crystallographic glide planes, similar to the case of metals. With a < 100 > -oriented perovskite layer the imprint pressure activates a (110) < 110 > -type glide system, providing material transport at 45° with respect to the surface normal. The consequences of this preferential direction are investigated by analyzing experiments with partial and complete filling of the cavities of the stamp used for imprint. By considering the geometric correlations during the initial imprint phase the experimental results can be understood. Beyond that, it turns out that under specific conditions the size and the shape of the grains can be controlled by the imprinted pattern. This ‘grain shaping by patterning’ provides unexpected, innovative prospects for the nanoimprint of perovskite layers.
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影响因子：
2.3
作者：
T. Lévéder;S. Landis;L. Davoust;N. Chaix
通讯作者：
N. Chaix
用于热和紫外纳米压印光刻的透明混合聚合物印模副本，分辨率低于 50 nm
影响因子：
1.4
作者：
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通讯作者：
H. Solak
影响因子：
6.8
作者：
Pourdavoud, Neda;Mayer, Andre;Riedl, Thomas
通讯作者：
Riedl, Thomas
DOI：
10.1007/s00339-021-04366-3
发表时间：
2021-04-01
影响因子：
2.7
作者：
Mayer, Andre;Pourdavoud, Neda;Scheer, Hella-Christin
通讯作者：
Scheer, Hella-Christin
影响因子：
29.4
作者：
Pourdavoud, Neda;Haeger, Tobias;Riedl, Thomas
通讯作者：
Riedl, Thomas