Self-Powered Deep-Ultraviolet Photodetector Driven by Combined Piezoelectric/Ferroelectric Effects
In this study, in situ piezoelectricity was incorporated into the photoactive region to prepare a self-powered deep-ultraviolet photodetector based on a mixture of polyvinylidene fluoride (PVDF)@Ga<sub>2</sub>O<sub>3</sub> and polyethyleneimine (PEI)/carbon quantum dots (CQDs...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-11-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/14/23/1903 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846123970472968192 |
|---|---|
| author | Vo Pham Hoang Huy Chung Wung Bark |
| author_facet | Vo Pham Hoang Huy Chung Wung Bark |
| author_sort | Vo Pham Hoang Huy |
| collection | DOAJ |
| description | In this study, in situ piezoelectricity was incorporated into the photoactive region to prepare a self-powered deep-ultraviolet photodetector based on a mixture of polyvinylidene fluoride (PVDF)@Ga<sub>2</sub>O<sub>3</sub> and polyethyleneimine (PEI)/carbon quantum dots (CQDs). A ferroelectric composite layer was prepared using β-Ga<sub>2</sub>O<sub>3</sub> as a filler, and the β-phase of PVDF was used as the polymer matrix. The strong piezoelectricity of β-PVDF can facilitate the separation and transport of photogenerated carriers in the depletion region and significantly reduce the dark current when the device is biased with an external bias, resulting in a high on/off ratio and high detection capability. The self-powered PD exhibited specific detectivity (D* = 3.5 × 10<sup>10</sup> Jones), an on/off ratio of 2.7, and a response speed of 0.11/0.33 s. Furthermore, the prepared PD exhibits excellent photoresponse stability under continuous UV light, with the photocurrent retaining 83% of its initial value after about 500 s of irradiation. Our findings suggest a new approach for developing cost-effective UV PDs for optoelectronic applications in related fields. |
| format | Article |
| id | doaj-art-2fa392e2d1334b828fcfaedce82532c3 |
| institution | Kabale University |
| issn | 2079-4991 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-2fa392e2d1334b828fcfaedce82532c32024-12-13T16:29:19ZengMDPI AGNanomaterials2079-49912024-11-011423190310.3390/nano14231903Self-Powered Deep-Ultraviolet Photodetector Driven by Combined Piezoelectric/Ferroelectric EffectsVo Pham Hoang Huy0Chung Wung Bark1Department of Electrical Engineering, Gachon University, Seongnam 13120, Republic of KoreaDepartment of Electrical Engineering, Gachon University, Seongnam 13120, Republic of KoreaIn this study, in situ piezoelectricity was incorporated into the photoactive region to prepare a self-powered deep-ultraviolet photodetector based on a mixture of polyvinylidene fluoride (PVDF)@Ga<sub>2</sub>O<sub>3</sub> and polyethyleneimine (PEI)/carbon quantum dots (CQDs). A ferroelectric composite layer was prepared using β-Ga<sub>2</sub>O<sub>3</sub> as a filler, and the β-phase of PVDF was used as the polymer matrix. The strong piezoelectricity of β-PVDF can facilitate the separation and transport of photogenerated carriers in the depletion region and significantly reduce the dark current when the device is biased with an external bias, resulting in a high on/off ratio and high detection capability. The self-powered PD exhibited specific detectivity (D* = 3.5 × 10<sup>10</sup> Jones), an on/off ratio of 2.7, and a response speed of 0.11/0.33 s. Furthermore, the prepared PD exhibits excellent photoresponse stability under continuous UV light, with the photocurrent retaining 83% of its initial value after about 500 s of irradiation. Our findings suggest a new approach for developing cost-effective UV PDs for optoelectronic applications in related fields.https://www.mdpi.com/2079-4991/14/23/1903ultraviolet C (UVC) photodetectorβ-phase polyvinylidene fluorideβ-phase gallium oxideferroelectric effectself-powered |
| spellingShingle | Vo Pham Hoang Huy Chung Wung Bark Self-Powered Deep-Ultraviolet Photodetector Driven by Combined Piezoelectric/Ferroelectric Effects Nanomaterials ultraviolet C (UVC) photodetector β-phase polyvinylidene fluoride β-phase gallium oxide ferroelectric effect self-powered |
| title | Self-Powered Deep-Ultraviolet Photodetector Driven by Combined Piezoelectric/Ferroelectric Effects |
| title_full | Self-Powered Deep-Ultraviolet Photodetector Driven by Combined Piezoelectric/Ferroelectric Effects |
| title_fullStr | Self-Powered Deep-Ultraviolet Photodetector Driven by Combined Piezoelectric/Ferroelectric Effects |
| title_full_unstemmed | Self-Powered Deep-Ultraviolet Photodetector Driven by Combined Piezoelectric/Ferroelectric Effects |
| title_short | Self-Powered Deep-Ultraviolet Photodetector Driven by Combined Piezoelectric/Ferroelectric Effects |
| title_sort | self powered deep ultraviolet photodetector driven by combined piezoelectric ferroelectric effects |
| topic | ultraviolet C (UVC) photodetector β-phase polyvinylidene fluoride β-phase gallium oxide ferroelectric effect self-powered |
| url | https://www.mdpi.com/2079-4991/14/23/1903 |
| work_keys_str_mv | AT vophamhoanghuy selfpowereddeepultravioletphotodetectordrivenbycombinedpiezoelectricferroelectriceffects AT chungwungbark selfpowereddeepultravioletphotodetectordrivenbycombinedpiezoelectricferroelectriceffects |