基于等离子体增强上转换发光的窄带1550 nm光探测  

Narrowband 1550 nm Photodetection Based on Plasmon-enhanced Upconversion Luminescence

作　　者：周博明 覃子晟 王姝欢 杨棕媛 江苇瑶 赵赫然 曹鹏 鲍民杰 程惠宁 季亚楠 ZHOU Boming;QIN Zisheng;WANG Shuhuan;YANG Zongyuan;JIANG Weiyao;ZHAO Heran;CAO Peng;BAO Minjie;CHENG Huining;JI Yanan(Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission,Key Laboratory of Photosensitive Materials&Devices of Liaoning Province,School of Physics and Materials Engineering,Dalian Minzu University,Dalian 116600,China)

机构地区：[1]大连民族大学物理与材料工程学院,国家民委新能源与稀土资源利用重点实验室,辽宁省光敏材料与器件重点实验室,辽宁大连116600

出　　处：《发光学报》2024年第1期139-148,共10页Chinese Journal of Luminescence

基　　金：国家自然科学基金(12104084);辽宁省教育厅基本科研项目(LJKQR20222484);大连市科技人才创新支持政策(2022RQ020);区域光纤通信网与新型光通信系统国家重点实验室开放基金(2023GZKF06)。

摘　　要：近红外光(NIR)探测技术在军事、通信和工业应用中发挥着重要的作用,巨大的市场需求带动了NIR光电探测器(PDs)研究的快速发展。具有双光子或多光子泵浦特性的稀土掺杂上转换纳米颗粒(UCNPs)可以将NIR光子转换为可见光子或紫外光子,并被禁带宽度更宽的半导体吸收,进而制备出性能优异的上转换PDs。然而,NIR窄带上转换PDs的实现仍然面临一些困难,例如稀土离子荧光量子效率低、需要高泵浦阈值才能实现可探测的上转换发光。在此,我们利用NaYF4∶4%Er UCNPs与钙钛矿半导体层相结合,实现了1550 nm的窄带上转换PDs。通过使用具有局域表面等离子体共振效应的银纳米棒层(Ag NRs)增强了UCNPs的上转换发光,从而降低了上转换PDs的泵浦阈值。基于Ag NRs/NaYF4∶4%Er UCNPs/MAPbI3复合结构的PDs的最佳响应度(R)和探测率(D*)分别约为48.5 mA/W和5.7×10^(8) Jones。与纯UNCP/MAPbI3 PDs相比,R和D*均提高了一个数量级。我们成功地构建了一种简单的策略来制造出稳定的近红外窄带PDs。Near-infrared(NIR)detection technology plays an important role in military,communications and indus-trial applications.The huge market demand has led to a rapid development of research in NIR photodetectors(PDs).Rare earth doped upconversion nanoparticles(UCNPs)with two-or multi-photon pumping characteristics can convert NIR photons to visible or ultra-violet photons and be absorbed by semiconductors with wider bandgaps,producing up-conversion PDs with excellent performance.However,the implementation of NIR narrowband upconversion PDs still faces several difficulties,such as rare earth ion fluorescence quantum low efficiency,and the need for high pumping thresholds to achieve detectable upconversion luminescence.Herein,we utilized NaYF4∶4%Er UCNPs combined with perovskite semiconductor layers to achieve a narrowband upconversion PDs of 1550 nm.Upconversion luminescence of UCNPs is enhanced by using Ag nanorods(NRs)layers with localized surface plasmon resonance effect,thus lowing the pump threshold of the upconversion PDs.The optimized responsivity(R)and detectivity(D*)of Ag NRs/NaYF4∶4%Er UCNPs/MAPbI3 hybrid upconversion PDs are~48.5 mA/W and 5.7×10^(8) Jones,respectively.Compared with the pure UNCPs/MAPbI3 upconversion PDs,both the R and D*of hybrids PDs have improved by an order of magni-tude.We have successfully constructed a simple strategy to make stable NIR narrowband PDs.

关 键 词：上转换发光 局域表面等离子体共振 局域场调制 窄带近红外光电探测器 

分 类 号：TN215[电子电信—物理电子学]