探索具有大迁移率-寿命乘积的（BA）CsAgBiBr无铅混合双钙钛矿晶体用于X射线探测。
Exploring Lead-Free Hybrid Double Perovskite Crystals of (BA) CsAgBiBr with Large Mobility-Lifetime Product toward X-Ray Detection.
作者信息
Xu Zhiyun, Liu Xin, Li Yaobin, Liu Xitao, Yang Tao, Ji Chengmin, Han Shiguo, Xu Yadong, Luo Junhua, Sun Zhihua
机构信息
State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China.
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, P. R. China.
出版信息
Angew Chem Int Ed Engl. 2019 Oct 28;58(44):15757-15761. doi: 10.1002/anie.201909815. Epub 2019 Sep 17.
Halide double perovskites have recently bloomed as the green candidates for optoelectronic applications, such as X-ray detection. Despite great efforts, the exploration of promising organic-inorganic hybrid double perovskites toward X-ray detection remains unsuccessful. Now, single crystals of the lead-free hybrid double perovskite, (BA) CsAgBiBr (BA is n-butylammonium), featuring the unique 2D multilayered quantum-confined motif, enable quite large μτ (mobility-lifetime) product up to 1.21×10 cm V . This figure-of-merit realized in 2D hybrid double perovskites is unprecedented and comparable with that of CH NH PbI wafers. (BA) CsAgBiBr crystals also exhibit other intriguing attributes for X-ray detection, including high bulk resistivity, low density of defects and traps, and large X-ray attenuation coefficient. Consequently, a vertical-structure crystal device under X-ray source yields a superior sensitivity of 4.2 μC Gy cm .
卤化物双钙钛矿最近作为光电子应用（如X射线检测）的绿色候选材料而蓬勃发展。尽管付出了巨大努力，但探索有前景的有机-无机杂化双钙钛矿用于X射线检测仍未成功。现在，具有独特二维多层量子限域结构的无铅杂化双钙钛矿（BA）CsAgBiBr（BA为正丁基铵）单晶，其迁移率-寿命乘积（μτ）高达1.21×10⁻³ cm² V⁻¹。在二维杂化双钙钛矿中实现的这一品质因数是前所未有的，与CH₃NH₃PbI₃晶片相当。（BA）CsAgBiBr晶体在X射线检测方面还表现出其他有趣的特性，包括高体电阻率、低缺陷和陷阱密度以及大X射线衰减系数。因此，在X射线源下的垂直结构晶体器件产生了4.2 μC Gy⁻¹ cm⁻²的优异灵敏度。
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