Improving Photoelectric Conversion with Broadband Perovskite Metasurface,Nano Letters

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Improving Photoelectric Conversion with Broadband Perovskite Metasurface
Nano Letters ( IF 9.6 ) Pub Date : 2022-08-04 , DOI: 10.1021/acs.nanolett.2c01979
Jie He ₁ , Cheng-Yao Li ₁ , Dong-Xiang Qi ₁ , Qing Cai ₁ , Yu Liu ₁ , Ren-Hao Fan ₁ , Jing Su ₂ , Pengcheng Huo ₃ , Ting Xu ₃ , Ruwen Peng ₁ , Mu Wang _{1,

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Affiliation

The miniaturization and integration of optoelectronic devices require progressive size reduction of active layers, resulting in less optical absorption and lower quantum efficiency. In this work, we demonstrate that introducing a metasurface made of hybrid organic–inorganic perovskite (HOIP) can significantly enhance broadband absorption and improve photon-to-electron conversion, which roots from exciting Mie resonances together with suppressing optical transmission. On the basis of the HOIP metasurface, a broadband photodetector has been fabricated where photocurrent boosts more than 10 times in the frequency ranging from ultraviolet to visible. The device response time is less than 5.1 μs at wavelengths 380, 532, and 710 nm, and the relevant 3 dB bandwidth is over 0.26 MHz. Moreover, this photodetector has been applied as a signal receiver for transmitting 2D color images in broadband optical communication. These results accentuate the practical applications of HOIP metasurfaces in novel optoelectronic devices for broadband optical communication.

中文翻译：

用宽带钙钛矿超表面改善光电转换

光电子器件的小型化和集成化要求有源层的尺寸逐渐减小，从而导致更少的光吸收和更低的量子效率。在这项工作中，我们证明了引入由混合有机-无机钙钛矿（HOIP）制成的超表面可以显着增强宽带吸收并改善光子到电子的转换，这源于激发 Mie 共振以及抑制光传输。在 HOIP 超表面的基础上，制造了一种宽带光电探测器，其中光电流在从紫外到可见的频率范围内提升 10 倍以上。该器件在波长 380、532 和 710 nm 处的响应时间小于 5.1 μs，相关的 3 dB 带宽超过 0.26 MHz。而且，该光电探测器已被用作在宽带光通信中传输二维彩色图像的信号接收器。这些结果突出了 HOIP 超表面在用于宽带光通信的新型光电器件中的实际应用。

更新日期：2022-08-04

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