材料科学
钙钛矿(结构)
晶界
微晶
离域电子
化学物理
卤化物
兴奋剂
Crystal(编程语言)
磁滞
晶体孪晶
纳米技术
光电子学
碳纤维
凝聚态物理
结晶学
无机化学
复合材料
微观结构
物理
量子力学
计算机科学
化学
冶金
程序设计语言
作者
Wenqiang Fan,Suicai Zhang,Chenzhe Xu,Haonan Si,Zhaozhao Xiong,Yunqi Zhao,Kaikai Ma,Zheng Gang Zhang,Qingliang Liao,Zhuo Kang
标识
DOI:10.1002/adfm.202104633
摘要
The solution processing in hybrid perovskite films inevitably results in the formation of detrimental defects at grain boundaries (GBs) that deteriorate the optoelectronic properties and bring about severe hysteresis as well as operational instability. Here, an effective scenario to alleviate the imperfection issue at perovskite GBs via incorporating pyridinic nitrogen-doped graphdiyne (N-GDY) is proposed. Taking full advantage of periodic acetylenic linkages and introduced pyridinic N atoms, the deep-level trap states like Pb–I antisite defects and under-coordinated Pb atoms are considerably passivated, thus diminishing the undesired non-radiative recombination. Additionally, the spatial confinement coupling with electrostatic repulsion effect originated from the intrinsic 2D structure of N-GDY, has been identified to deal with the halide ion migration behavior. Such contributions are further theoretically evidenced with the charge density delocalization as well as the ion migration energy barrier elevation. The authors unprecedentedly verified the superiorities based on the flexible chemical-tailorability of atomic crystal GDY materials toward polycrystalline perovskite related energy conversion devices.
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