Graphene protection improves the stability of two-dimensional halide perovskites under the electron irradiation,Microscopy Research and Technique

当前位置： X-MOL 学术 › Microsc. Res. Tech. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Graphene protection improves the stability of two-dimensional halide perovskites under the electron irradiation
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2022-07-26 , DOI: 10.1002/jemt.24209
Biao Yuan _{1,

2} , Ziyi Hua ₃ , Shunhan Jia _{3,

4} , Yuan Lu _{1,

2} , Enzheng Shi ₃ , Yi Yu _{1,

2}

Affiliation

The crystal structure of two-dimensional (2D) organic–inorganic halide perovskites undergoes fast structural collapse under the electron beam irradiation, hindering high-resolution transmission electron microscopy imaging. Graphene protection is an effective solution to mitigate the damage of electron-beam irradiation and has been applied in 2D materials such as MoS₂. However, the effectivity of graphene protection has not been demonstrated in 2D halide perovskites yet, as traditional wet-transfer of graphene with aqueous solution would cause serious degradation for moisture-sensitive halide perovskites. Here, we verified that graphene protection plays a protection role and developed a method using nonpolar solvent to transfer the graphene layer atop the perovskite nanosheets. With this method, the perovskite nanosheets might be well protected by graphene encapsulation.

中文翻译：

石墨烯保护提高了电子辐照下二维卤化物钙钛矿的稳定性

二维（2D）有机-无机卤化物钙钛矿的晶体结构在电子束照射下会发生快速结构坍塌，阻碍了高分辨率透射电子显微镜成像。石墨烯保护是减轻电子束辐照损伤的有效解决方案，已应用于MoS _{2等二维材料}. 然而，石墨烯保护的有效性尚未在二维卤化物钙钛矿中得到证实，因为石墨烯与水溶液的传统湿转移会导致对水分敏感的卤化物钙钛矿严重降解。在这里，我们验证了石墨烯保护起到了保护作用，并开发了一种使用非极性溶剂将石墨烯层转移到钙钛矿纳米片上的方法。通过这种方法，钙钛矿纳米片可以通过石墨烯封装得到很好的保护。

更新日期：2022-07-26

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11