Room‐Temperature Band‐Aligned Infrared Heterostructures for Integrable Sensing and Communication
| Title: | Room‐Temperature Band‐Aligned Infrared Heterostructures for Integrable Sensing and Communication |
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| Authors: | Kening Xiao, Shi Zhang, Kaixuan Zhang, Libo Zhang, Yuanfeng Wen, Shijian Tian, Yunlong Xiao, Chaofan Shi, Shicong Hou, Changlong Liu, Li Han, Jiale He, Weiwei Tang, Guanhai Li, Lin Wang, Xiaoshuang Chen |
| Source: | Advanced Science, Vol 11, Iss 36, Pp n/a-n/a (2024) |
| Publisher Information: | Wiley, 2024. |
| Publication Year: | 2024 |
| Collection: | LCC:Science |
| Subject Terms: | optical communication, topological insulator, type‐II van der Waals integration heterojunction, wide spectral, Science |
| More Details: | Abstract The demand for miniaturized and integrated multifunctional devices drives the progression of high‐performance infrared photodetectors for diverse applications, including remote sensing, air defense, and communications, among others. Nonetheless, infrared photodetectors that rely solely on single low‐dimensional materials often face challenges due to the limited absorption cross‐section and suboptimal carrier mobility, which can impair sensitivity and prolong response times. Here, through experimental validation is demonstrated, precise control over energy band alignment in a type‐II van der Waals heterojunction, comprising vertically stacked 2D Ta2NiSe5 and the topological insulator Bi2Se3, where the configuration enables polarization‐sensitive, wide‐spectral‐range photodetection. Experimental evaluations at room temperature reveal that the device exhibits a self‐powered responsivity of 0.48 A·W−1, a specific directivity of 3.8 × 1011 cm·Hz1/2·W−1, a response time of 151 µs, and a polarization ratio of 2.83. The stable and rapid photoresponse of the device underpins the utility in infrared‐coded communication and dual‐channel imaging, showing the substantial potential of the detector. These findings articulate a systematic approach to developing miniaturized, multifunctional room‐temperature infrared detectors with superior performance metrics and enhanced capabilities for multi‐information acquisition. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2198-3844 20240171 |
| Relation: | https://doaj.org/toc/2198-3844 |
| DOI: | 10.1002/advs.202401716 |
| Access URL: | https://doaj.org/article/fd966c3ecb2d44b9811cf170d2ebd69b |
| Accession Number: | edsdoj.fd966c3ecb2d44b9811cf170d2ebd69b |
| Database: | Directory of Open Access Journals |
| ISSN: | 21983844 20240171 |
|---|---|
| DOI: | 10.1002/advs.202401716 |
| Published in: | Advanced Science |
| Language: | English |