Polarization-resolved black phosphorus/molybdenum disulfide mid-wave infrared photodiodes with high detectivity at room temperature
| Autor: | Yu-Lun Chueh, Geun Ho Ahn, Vivek Raj Shrestha, Valerio Adinolfi, Yang Gao, Ali Javey, Kenneth B. Crozier, Yu Ze Chen, James Bullock, Joy Cho, Matin Amani |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Infrared business.industry Detector Photodetector Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Photodiode law.invention chemistry.chemical_compound Semiconductor chemistry law Optoelectronics 0210 nano-technology business Molybdenum disulfide |
| Zdroj: | Nature Photonics. 12:601-607 |
| ISSN: | 1749-4893 1749-4885 |
| Popis: | Infrared photodetectors are currently subject to a rapidly expanding application space, with an increasing demand for compact, sensitive and inexpensive detectors. Despite continued advancement, technological factors limit the widespread usage of such detectors, specifically, the need for cooling and the high costs associated with processing of iii–v/ii–vi semiconductors. Here, black phosphorous (bP)/MoS2 heterojunction photodiodes are explored as mid-wave infrared (MWIR) detectors. Although previous studies have demonstrated photodiodes using bP, here we significantly improve the performance, showing that such devices can be competitive with conventional MWIR photodetectors. By optimizing the device structure and light management, we demonstrate a two-terminal device that achieves room-temperature external quantum efficiencies (ηe) of 35% and specific detectivities (D*) as high as 1.1 × 1010 cm Hz1/2 W−1 in the MWIR region. Furthermore, by leveraging the anisotropic optical properties of bP we demonstrate the first bias-selectable polarization-resolved photodetector that operates without the need for external optics. |
| Databáze: | OpenAIRE |
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