التفاصيل البيبلوغرافية
| العنوان: |
Enhanced detectivity of PbS quantum dots infrared photodetector by introducing the tunneling effect of PMMA |
| المؤلفون: |
Ma, Zhenzhen, Li, Jiahui, Zhang, Yating, Zhao, Hongliang, Li, Qingyan, Ma, Chengqi, Yao, Jianquan |
| المساهمون: |
the Basic Research Program of Shenzhen, National Natural Science Foundation of China, National Key Research and Development Program of China, Beiyang yong junior faculties of Tianjin university |
| المصدر: |
Nanotechnology ; volume 32, issue 19, page 195502 ; ISSN 0957-4484 1361-6528 |
| بيانات النشر: |
IOP Publishing |
| سنة النشر: |
2021 |
| الوصف: |
With extremely high optical absorption coefficient in infrared regime, lead sulfide (PbS) quantum dots (QDs)-based photodetectors are promising for diverse applications. In recent years, synthesis of materials has made great progress, but the problem of low sensitivity of quantum dots photodetector still unresolved. In this work, the introduction of a tunneling organic layer effectively address this problem. The dark current is decreased by the appropriate thickness of polymethyl methacrylate (PMMA) barrier layer by suppressing the spontaneous migration of ions, and the photogenerated carriers are little effected, thereby the responsivity of the device is improved. As a result, the device exhibits a high responsivity of 3.73 × 10 5 mA W −1 and a giant specific detectivity of 4.01 × 10 13 Jones at a low voltage of −1 V under 1064 nm illumination. In the self-powered mode, the responsivity reaches a value of 157.6 mA W −1 , and the detectivity up to 5.9 × 10 11 Jones. The performance of the photodetectors is obviously better than most of the reported QDs photodetectors. The design of this device structure provides a new solution to the problem of low sensitivity and high leakage current of quantum dots based infrared photodetectors. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| DOI: |
10.1088/1361-6528/abcc20 |
| DOI: |
10.1088/1361-6528/abcc20/pdf |
| الإتاحة: |
https://doi.org/10.1088/1361-6528/abcc20Test |
| حقوق: |
https://iopscience.iop.org/page/copyrightTest ; https://iopscience.iop.org/info/page/text-and-data-miningTest |
| رقم الانضمام: |
edsbas.D059A4D9 |
| قاعدة البيانات: |
BASE |
