当前位置: X-MOL 学术Small › 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.)
Bulk Photovoltaic Effect Induced by Non‐Covalent Interactions in Bilayered Hybrid Perovskite for Efficient Passive X‐Ray Detection
Small ( IF 13.3 ) Pub Date : 2024-05-13 , DOI: 10.1002/smll.202403198
Dongying Fu 1, 2 , Yue Zhang 1 , Zhuo Chen 1 , Lin Pan 1 , Yueyue He 1 , Junhua Luo 3
Affiliation  

Hydrogen bonding as a multifunctional tool has always influenced the structure of hybrid perovskites. Compared with the research on hydrogen bonding, the study of halogen‐halogen interactions on the structure and properties of hybrid perovskites is still in its early stages. Herein, a polar bilayered hybrid perovskite (IEA)2FAPb2I7 (IEA+ is 2‐iodoethyl‐1‐ammonium, FA is formamidinium) with iodine‐substituted spacer is successfully constructed by changing the configuration of interlayer cations and regulating non‐covalent interactions at the organic–inorganic interface, which shows a shorter interlayer spacing and higher density (ρ = 3.862 g cm−3). The generation of structure polarity in (IEA)2FAPb2I7 is caused by the synergistic effect of hydrogen bonding and halogen‐halogen interactions. Especially, as the length of the carbon chain in organic cations decreases, the I‐‐‐I interaction in the system gradually strengthens, which may be the main reason for the symmetry‐breaking. Polarity‐induced bulk photovoltaics (Voc = 1.0 V) and higher density endow the device based on (I‐EA)2FAPb2I7 exhibit a high sensitivity of 175.6 µC Gy−1 cm−2 and an ultralow detection limit of 60.4 nGy s−1 at 0 V bias under X‐ray irradiation. The results present a facile approach for designing polar multifunctional hybrid perovskites, also providing useful assistance for future research on halogen‐halogen interactions.

中文翻译:

双层杂化钙钛矿中非共价相互作用引起的体光伏效应,用于高效被动 X 射线检测

氢键作为一种多功能工具一直影响着杂化钙钛矿的结构。与氢键的研究相比,卤-卤相互作用对杂化钙钛矿结构和性能的研究仍处于早期阶段。这里,极性双层杂化钙钛矿(IEA)2FAPb27(国际能源署+通过改变层间阳离子的构型和调节有机-无机界面的非共价相互作用,成功构建了碘取代的间隔物(FA为2-碘乙基-1-铵,FA为甲脒),具有更短的层间距和更高的密度(ρ= 3.862 克·厘米−3)。 (IEA)中结构极性的产生2FAPb27是由氢键和卤素-卤素相互作用的协同效应引起的。特别是,随着有机阳离子碳链长度的减小,体系中的I--I相互作用逐渐增强,这可能是对称性破缺的主要原因。极性诱导的体光伏发电(V奥克= 1.0 V)和更高的密度赋予了基于(I-EA)的器件2FAPb27表现出 175.6 µC Gy 的高灵敏度−1厘米−2超低检测限 60.4 nGy s−1X射线照射下0V偏压。研究结果为设计极性多功能杂化钙钛矿提供了一种简便的方法,也为未来卤素-卤素相互作用的研究提供了有用的帮助。
更新日期:2024-05-13
down
wechat
bug