Zugasti-Fernández Dulce, Román-Román Priscila I, Gutierrez-Avila Mara, Gómora-Figueroa A Paulina, Hernández-Cordero Juan, Jancik Vojtech, Hernández-Como Norberto, Solis-Ibarra Diego
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria A.P. 70-360, Coyoacán Mexico City 04510 Mexico
Facultad de Ingeniería, Universidad Nacional Autónoma de México (UNAM) Coyoacán Ciudad de México 04510 Mexico.
Chem Sci. 2025 Jul 22;16(34):15597-15601. doi: 10.1039/d5sc02348c. eCollection 2025 Aug 27.
Halide perovskites have shown tremendous potential as active materials in various optoelectronic devices, including solar cells, light-emitting diodes and photodetectors. However, their relatively large bandgaps - typically limited to ∼1.40 eV (∼885 nm) - constrain their use as near-infrared (NIR) photodetectors. Here, we present a novel two-dimensional (2D) hybrid perovskite (PDA)PbI (PDA = 6-phenyl-3,5-hexadiynylammonium), which upon thermopolymerization forms (poly-PDA) PbI (polyPDA = polymerized PDA). This material can be incorporated into NIR photodetectors exhibiting record-high responsivities of up to 10 A W and external quantum efficiencies of up to (128.0 ± 3.6)% at 980 nm under a 4 V bias. Notably, the devices can be fabricated, operated, and stored entirely under ambient air conditions, highlighting their stability and processability.
卤化物钙钛矿在包括太阳能电池、发光二极管和光电探测器在内的各种光电器件中作为活性材料展现出了巨大潜力。然而，它们相对较大的带隙——通常限制在1.40 eV（885 nm）——限制了它们作为近红外（NIR）光电探测器的应用。在此，我们展示了一种新型二维（2D）杂化钙钛矿（PDA）PbI（PDA = 6-苯基-3,5-己二炔基铵），其在热聚合后形成（聚-PDA）PbI（聚PDA = 聚合后的PDA）。这种材料可以被整合到近红外光电探测器中，在4 V偏压下，于980 nm处展现出高达10 A W的创纪录高响应度以及高达（128.0 ± 3.6）%的外量子效率。值得注意的是，这些器件可以完全在环境空气条件下制造、操作和存储，突出了它们的稳定性和可加工性。
