材料科学
表面等离子共振
纳米晶
石墨烯
光电子学
光电探测器
等离子体子
壳体(结构)
光子学
纳米技术
芯(光纤)
吸收(声学)
纳米颗粒
复合材料
作者
Maogang Gong,Mohammed Alamri,Dan Ewing,Seyed M. Sadeghi,Judy Wu
标识
DOI:10.1002/adma.202002163
摘要
Abstract Localized surface plasmon resonance (LSPR) is shown to be effective in trapping light for enhanced light absorption and hence performance in photonic and optoelectronic devices. Implementation of LSPR in all‐inorganic perovskite nanocrystals (PNCs) is particularly important considering their unique advantages in optoelectronics. Motivated by this, the first success in colloidal synthesis of AuCu/CsPbCl 3 core/shell PNCs and observation of enhanced light absorption by the perovskite CsPbCl 3 shell of thickness in the range of 2–4 nm, enabled by the LSPR AuCu core of an average diameter of 7.1 nm, is reported. This enhanced light absorption leads to a remarkably enhanced photoresponse in PNCs/graphene nanohybrid photodetectors using the AuCu/CsPbCl 3 core/shell PNCs, by more than 30 times as compared to the counterparts with CsPbCl 3 PNCs only (8–12 nm in dimension). This result illustrates the feasibility in implementation of LSPR light trapping directly in core/shell PNCs for high‐performance optoelectronics.
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