Sahu Debabrata, Debnath Subhankar, Ghosal Sirsendu, Giri P K
Department of Physics, Indian Institute of Technology Guwahati, Guwahati 781039, India.
Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, India.
ACS Appl Mater Interfaces. 2024 Sep 18;16(37):49544-49555. doi: 10.1021/acsami.4c12822. Epub 2024 Sep 4.
Utilizing noble metal nanoparticles through novel technologies is a promising avenue for enhancing the performance of organic/inorganic photodetectors. This study investigates the performance enhancement of Formamidinium-based perovskite (Pe) photodetectors (PDs) through the incorporation of plasmonic silver nanoparticles (Ag NPs) arrays using a 2D printing technique. The incorporation of plasmonic Ag NPs leads to a major improvement in the performance of the planar PD device, which is attributed to increased light absorption, hot electron generation, and more efficient charge extraction and transport. The unique aspect of this study lies in the method of incorporating plasmonic NPs using a two-dimensional printing technology. This approach offers several advantages over traditional methods, including lower cost, nonvacuum operation, and compatibility with room temperature fabrication. The printed plasmon-enhanced optimized perovskite PD exhibits remarkable performance metrics, including a peak responsivity of 1.03 A/W at 5 V external bias, which is significantly high compared to the reported devices. Moreover, the PD demonstrates exceptional detectivity with a peak value of 3.7 × 10 Jones at 5 V, highlighting its capability to detect ultralow light signals with high precision. The device can be reversibly switched between low and high conductance states, yielding a stable and repeatable / ratio of 1.06 × 10. In addition, the integration of plasmonic nanoparticles imparts remarkable photovoltaic characteristics to the perovskite photodetector, enabling it to function as a self-biased device. The hybrid device demonstrates a peak responsivity of 15 mA/W, a high detectivity of 2.15 × 10 Jones, and a significant on-off ratio of 2.23 × 10, all achieved at zero external bias. Overall, this study presents a significant advancement in the field of plasmon-enhanced Pe photodetection technology. By utilizing the benefits of printing technology to incorporate NPs, we have developed a high-performance PD that combines cost-effectiveness with exceptional performance. Thus, we believe that this study will pave the way for the development of a low-cost, high-performance plasmon-enhanced Pe-based PD.
通过新技术利用贵金属纳米颗粒是提高有机/无机光电探测器性能的一条有前途的途径。本研究通过使用二维打印技术引入等离子体银纳米颗粒（Ag NPs）阵列，研究了基于甲脒的钙钛矿（Pe）光电探测器（PDs）的性能提升。等离子体Ag NPs的引入导致平面PD器件的性能有了重大改善，这归因于光吸收增加、热电子产生以及更高效的电荷提取和传输。本研究的独特之处在于使用二维打印技术引入等离子体NP的方法。这种方法相对于传统方法具有几个优点，包括成本更低、非真空操作以及与室温制造的兼容性。印刷的等离子体增强优化钙钛矿PD表现出显著的性能指标，包括在5 V外部偏压下1.03 A/W的峰值响应度，与已报道的器件相比显著更高。此外，该PD在5 V时表现出3.7×10琼斯的峰值探测率，突出了其高精度检测超低光信号的能力。该器件可以在低电导和高电导状态之间可逆切换，产生稳定且可重复的1.06×10的开/关比。此外，等离子体纳米颗粒的集成赋予钙钛矿光电探测器显著的光伏特性，使其能够作为自偏置器件工作。该混合器件在零外部偏压下实现了15 mA/W的峰值响应度、2.15×10琼斯的高探测率以及2.23×10的显著开/关比。总体而言，本研究在等离子体增强Pe光电探测技术领域取得了重大进展。通过利用打印技术引入NP的优势，我们开发了一种兼具成本效益和卓越性能的高性能PD。因此，我们相信这项研究将为低成本、高性能的基于等离子体增强Pe的PD的开发铺平道路。
