Facilitating All-Inorganic Halide Perovskites Fabrication in Confined-Space Deposition
Facilitating All-Inorganic Halide Perovskites Fabrication in Confined-Space Deposition
复制标题
促进密闭空间沉积中全无机卤化物钙钛矿的制造
DOI：
10.1002/smtd.202000102
复制
发表时间：
2020
期刊：
影响因子：
12.4
通讯作者：
Tianyou Zhai
中科院分区：
文献类型：
--
作者：
Renyan Wang;Yasar Muhammad;Xiang Xu;Meng Ran;Qingfu Zhang;Junchuan Zhong;Fuwei Zhuge;Huiqiao Li;Lin Gan;Tianyou Zhai
二维全无机卤化物钙钛矿（2D AIHP）因其优异的光电性能和有机-无机卤化物钙钛矿优异的大气稳定性而引起了极大的关注。 2D AIHP 已通过多种策略制造，但同时达到良好质量、尺寸和均匀性的令人满意的方法仍远未实现。这里，提出了一种直接热沉积方法来合成横向长度高达约30微米、均匀厚度低至约10纳米的2D AIHP，其表现出与报道的顶级2D AIHP相当的优异光电性能。采用垂直传质代替传统的水平传质模式，显着提高了沉积稳定性。此外，在沉积温度的控制下，AIHP的形貌可以在纳米线和纳米片之间切换。该方法可能为各种应用的 2D AIHP 或基于 AIHP 的 2D 异质结构的统一制造铺平道路。
2D all‐inorganic halide perovskites (2D AIHP) have attracted huge attention for their excellent optoelectronic properties and superior atmospheric stability for organic–inorganic halide perovskites. 2D AIHP has been fabricated by varied strategies, whereas a satisfied way to simultaneously reach good quality, dimensions, and uniformity is still far from achieved yet. Here, a direct thermal deposition method to synthesize 2D AIHP of lateral length up to ≈30 µm and uniform thickness down to ≈10 nm, which shows excellent optoelectronic performance comparable to the reported top‐level 2D AIHP, is proposed. A vertical mass transport instead of conventional horizontal mode is adopted, significantly enhancing the deposition stability. Furthermore, the morphologies of AIHP are switchable between nanowires and nanoflakes under the control of deposition temperature. This method may pave the way for uniform fabrication of 2D AIHP or AIHP‐based 2D heterostructures for various applications.