A silver nanoparticle (AgNP)-loaded Bi2Se3 topological insulator p-n heterojunction photodiode for a near-infrared (NIR) photodetector

IF 2.5 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Nano Futures Pub Date : 2023-05-09 DOI:10.1088/2399-1984/acd3ca
V. Elangovan, V. Vaiyapuri, Aysha Parveen R, A. Jayaram, Harish Santhanakrishnan, Navaneethan Mani
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Abstract

Near-infrared (NIR) photons are expanding advanced applications in optoelectronics. However, while 2D materials like graphene offer an attractive route for NIR photodetection, the alternative for high-performance NIR detection is still evolving. Hence, solution-processed n-Bi2Se3 /p-Si-based 2D heterojunction photodiodes have been fabricated here and used for high-performance NIR detection. Further, we report high photoresponsivity of 248 mA W−1 at 1100 nm, high external quantum efficiency of 22, 23 and 28% for Ag-loaded (at 5, 7.5 and 10%) Bi2Se3 and good stability. The chemical states of Bi2Se3 and Ag are detected using the core-level spectra of x-ray photoelectron spectroscopy. Photoresponse I–V characteristics are investigated under both dark and illumination; the high photocurrent achieved for Ag-loaded Bi2Se3 and the increase in the forward photocurrent under both dark and bright conditions are reported. The temporal photoresponse curve confirms the good stability (photoswitching behavior) and reproducibility with a response time of 0.74 s and a decay time of 0.18 s. Therefore, these unique performance and device parameters of a manufactured photodiode strongly recommend as a potential heterojunction photodiode for an NIR photodetector.
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一种用于近红外(NIR)光电探测器的负载银纳米粒子(AgNP) Bi2Se3拓扑绝缘体p-n异质结光电二极管
近红外(NIR)光子正在扩大光电子的高级应用。然而,尽管石墨烯等2D材料为近红外光电检测提供了一条有吸引力的途径,但高性能近红外检测的替代方案仍在发展中。因此,溶液处理的n-Bi2Se3/p-Si基2D异质结光电二极管已经在这里制造出来,并用于高性能的NIR检测。此外,我们报道了负载Ag(在5%、7.5%和10%)的Bi2Se3在1100 nm下具有248 mA W−1的高光响应性,22、23和28%的高外量子效率和良好的稳定性。利用x射线光电子能谱的核心能级谱检测了Bi2Se3和Ag的化学状态。研究了在黑暗和光照条件下的光响应I–V特性;报道了负载Ag的Bi2Se3获得的高光电流以及在黑暗和明亮条件下正向光电流的增加。时间光响应曲线证实了良好的稳定性(光开关行为)和再现性,响应时间为0.74s,衰减时间为0.18s。因此,强烈推荐制造的光电二极管的这些独特性能和器件参数作为NIR光电探测器的潜在异质结光电二极管。
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来源期刊
Nano Futures
Nano Futures Chemistry-General Chemistry
CiteScore
4.30
自引率
0.00%
发文量
35
期刊介绍: Nano Futures mission is to reflect the diverse and multidisciplinary field of nanoscience and nanotechnology that now brings together researchers from across physics, chemistry, biomedicine, materials science, engineering and industry.
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