Wei Yazhou, Xin Deyu, Tie Shujie, Yang Ning, Yuan Ruihan, Zheng Xiaojia
Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China.
Sichuan Research Center of New Materials, Chengdu 610200, China.
J Phys Chem Lett. 2023 Apr 6;14(13):3313-3319. doi: 10.1021/acs.jpclett.3c00563. Epub 2023 Mar 29.
Two-dimensional (2D) Ruddlesden-Popper (RP) metal halide perovskites have emerged as a promising material for X-ray detection. However, defects and ion migration generated nonradiative recombination and high dark current could cause severe performance degradation, which hinders their application. Herein, rubrene was added to the precursor solution of BAMAPbI to modulate the performance of the 2D RP perovskite X-ray detectors. The cation-π interaction between rubrene and perovskite could passivate the defects and inhibit the ion migration, resulting in improved performance and stability. The detectors made with rubrene exhibited a sensitivity of 354.30 μC·Gy cm and a detection limit of 112.85 nGy s. This work highlights the synergistic effect of rubrene in defect passivation and ion migration inhibition, providing a facile approach toward sensitive perovskite X-ray detectors.
二维（2D）Ruddlesden-Popper（RP）金属卤化物钙钛矿已成为一种有前途的X射线检测材料。然而，缺陷和离子迁移产生的非辐射复合以及高暗电流会导致严重的性能下降，这阻碍了它们的应用。在此，将红荧烯添加到BAMAPbI的前驱体溶液中以调节二维RP钙钛矿X射线探测器的性能。红荧烯与钙钛矿之间的阳离子-π相互作用可以钝化缺陷并抑制离子迁移，从而提高性能和稳定性。用红荧烯制成的探测器灵敏度为354.30 μC·Gy cm，检测限为112.85 nGy s。这项工作突出了红荧烯在缺陷钝化和离子迁移抑制方面的协同作用，为制备灵敏的钙钛矿X射线探测器提供了一种简便方法。
