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Bulk Single Crystals of a Narrow Band Gap Three-Dimensional Hybrid Perovskitoid Enabling Ultrastable Photodetection
Chemistry of Materials ( IF 7.2 ) Pub Date : 2022-11-18 , DOI: 10.1021/acs.chemmater.2c02109 Ruiqing Li 1, 2, 3 , Haidong Jiang 4 , Yunpeng Yao 1, 3 , Huang Ye 1, 2, 3 , Xitao Liu 1, 2, 3 , Shuang Chen 4 , Junhua Luo 1, 2, 3, 5
Chemistry of Materials ( IF 7.2 ) Pub Date : 2022-11-18 , DOI: 10.1021/acs.chemmater.2c02109 Ruiqing Li 1, 2, 3 , Haidong Jiang 4 , Yunpeng Yao 1, 3 , Huang Ye 1, 2, 3 , Xitao Liu 1, 2, 3 , Shuang Chen 4 , Junhua Luo 1, 2, 3, 5
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Motivated by the high performance of optoelectronic devices, organic–inorganic hybrid perovskites (OIHPs), particularly three-dimensional (3D) OIHPs, have taken a promising position in optoelectronic devices, owing to their high absorption coefficient, long carrier lifetime, and superior conversion efficiency. However, 3D OIHPs inevitably suffer from destruction under moisture operating conditions; it is a great struggle to synchronously realize high performance and long-term stability in optoelectronic devices. Herein, bulk single crystals (6 × 2 × 1.5 mm3) of the 3D hybrid perovskitoid (C6H10N2)Pb2Br6 (1, C6H10N22+ = N,N′-dimethyl-pyrazinium) have been grown successfully, which exhibit an excellent light absorption capacity (730 nm) and superior stability. Based on the bulk crystals of 1, photodetectors are fabricated with an extremely low dark current (3.5 pA), large current on/off ratio (>103), considerable responsivity (R, 4 mA W–1), and detectivity (D*, 4 × 1010 Jones). Strikingly, these devices possess excellent working stability (over 90 days) under ultralong air exposure, which are much better than most of the reported 3D OIHP devices. Furthermore, both experimental and computational investigations reveal that the excellent stability originates from the hydrophobic property of alkyl groups in C6H10N22+ cations. All of these results not only provide an efficient avenue to acquire 3D perovskitoid bulk single crystals but also inspire further exploration of ultrastable photoelectric devices.
中文翻译：
窄带隙三维杂化钙钛矿的块状单晶实现超稳定光电检测
受光电器件高性能的推动，有机-无机杂化钙钛矿（OIHPs），特别是三维（3D）OIHPs，由于其高吸收系数、长载流子寿命和优异的转换率，在光电器件中占有一席之地效率。然而，3D OIHP 在潮湿操作条件下不可避免地会遭到破坏；在光电器件中同步实现高性能和长期稳定性是一场伟大的斗争。在此， 3D 杂化类钙钛矿 (C 6 H 10 N 2 )Pb 2 Br 6 ( 1 , C 6 H 10 ) 的块状单晶 (6 × 2 × 1.5 mm 3 )N 2 2+ = N , N '-二甲基-吡嗪鎓)已成功生长，具有优异的光吸收能力(730 nm)和优异的稳定性。基于1的块状晶体，制造的光电探测器具有极低的暗电流 (3.5 pA)、大电流开/关比 (>10 3 )、相当大的响应率 ( R , 4 mA W –1 ) 和探测率 ( D *, 4 × 10 10琼斯）。引人注目的是，这些设备在超长空气暴露下具有出色的工作稳定性（超过 90 天），这比大多数报道的 3D OIHP 设备要好得多。此外，实验和计算研究均表明，出色的稳定性源于 C 6 H 10 N 2 2+阳离子中烷基的疏水性。所有这些结果不仅为获得 3D 类钙钛矿块状单晶提供了有效途径，而且激发了对超稳光电器件的进一步探索。
更新日期：2022-11-18
中文翻译：
窄带隙三维杂化钙钛矿的块状单晶实现超稳定光电检测
受光电器件高性能的推动，有机-无机杂化钙钛矿（OIHPs），特别是三维（3D）OIHPs，由于其高吸收系数、长载流子寿命和优异的转换率，在光电器件中占有一席之地效率。然而，3D OIHP 在潮湿操作条件下不可避免地会遭到破坏；在光电器件中同步实现高性能和长期稳定性是一场伟大的斗争。在此， 3D 杂化类钙钛矿 (C 6 H 10 N 2 )Pb 2 Br 6 ( 1 , C 6 H 10 ) 的块状单晶 (6 × 2 × 1.5 mm 3 )N 2 2+ = N , N '-二甲基-吡嗪鎓)已成功生长，具有优异的光吸收能力(730 nm)和优异的稳定性。基于1的块状晶体，制造的光电探测器具有极低的暗电流 (3.5 pA)、大电流开/关比 (>10 3 )、相当大的响应率 ( R , 4 mA W –1 ) 和探测率 ( D *, 4 × 10 10琼斯）。引人注目的是，这些设备在超长空气暴露下具有出色的工作稳定性（超过 90 天），这比大多数报道的 3D OIHP 设备要好得多。此外，实验和计算研究均表明，出色的稳定性源于 C 6 H 10 N 2 2+阳离子中烷基的疏水性。所有这些结果不仅为获得 3D 类钙钛矿块状单晶提供了有效途径，而且激发了对超稳光电器件的进一步探索。
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