Fabrication of Different Types of Photodetectors Based on Carbon Quantum Dots/Alq3 Organic Material
In this work, the properties of the photodetector were improved by using carbon quantum dots (CQDs) and tris (8-hydroxyquinoline) aluminium (III) (Alq3) polymer when deposited on glass and silicon substrates. CQDs were prepared using an electrochemical method. Two methods of deposition were used; t...
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University of Baghdad
2024-12-01
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| Series: | Iraqi Journal of Physics |
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| Online Access: | https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/1272 |
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| author | Mina Mohammed Jawad Lamees A. Abdullah |
| author_facet | Mina Mohammed Jawad Lamees A. Abdullah |
| author_sort | Mina Mohammed Jawad |
| collection | DOAJ |
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In this work, the properties of the photodetector were improved by using carbon quantum dots (CQDs) and tris (8-hydroxyquinoline) aluminium (III) (Alq3) polymer when deposited on glass and silicon substrates. CQDs were prepared using an electrochemical method. Two methods of deposition were used; the first was drop casting, and the other was spin coating. The structural, electrical, and optical properties were studied. Measurements were made of the manufactured photoconductive detector's current-voltage (I–V) properties, photocurrent gain, response time, and quantum efficiency, responsivity. The constructed detector's performance was measured without light and using a 250-watt tungsten lamp, whose wavelength range was between 500 and 800 nm. The results showed that the best photodetector was when carbon quantum dots were used with Alq3 deposited on a silicon substrate using the drop-casting method (CQD:Alq3/Si). It was observed that the best gain, fastest rise, fall, and response times were 7.97, 0.98, 1.1, and 0.34 s, respectively.
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| format | Article |
| id | doaj-art-ac4d3d6e35bb49d18f423b2f31d765d6 |
| institution | OA Journals |
| issn | 2070-4003 2664-5548 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | University of Baghdad |
| record_format | Article |
| series | Iraqi Journal of Physics |
| spelling | doaj-art-ac4d3d6e35bb49d18f423b2f31d765d62025-08-20T01:57:40ZengUniversity of BaghdadIraqi Journal of Physics2070-40032664-55482024-12-0122410.30723/ijp.v22i4.1272Fabrication of Different Types of Photodetectors Based on Carbon Quantum Dots/Alq3 Organic MaterialMina Mohammed Jawad0Lamees A. Abdullah1https://orcid.org/0000-0002-0778-7411Department of Physics, College of Science, University of Baghdad, Baghdad, IraqDepartment of Physics, College of Science, University of Baghdad, Baghdad, Iraq In this work, the properties of the photodetector were improved by using carbon quantum dots (CQDs) and tris (8-hydroxyquinoline) aluminium (III) (Alq3) polymer when deposited on glass and silicon substrates. CQDs were prepared using an electrochemical method. Two methods of deposition were used; the first was drop casting, and the other was spin coating. The structural, electrical, and optical properties were studied. Measurements were made of the manufactured photoconductive detector's current-voltage (I–V) properties, photocurrent gain, response time, and quantum efficiency, responsivity. The constructed detector's performance was measured without light and using a 250-watt tungsten lamp, whose wavelength range was between 500 and 800 nm. The results showed that the best photodetector was when carbon quantum dots were used with Alq3 deposited on a silicon substrate using the drop-casting method (CQD:Alq3/Si). It was observed that the best gain, fastest rise, fall, and response times were 7.97, 0.98, 1.1, and 0.34 s, respectively. https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/1272PhotodetectorDrop CastingSpin CoatingCarbon Quantum DotsAlq3 |
| spellingShingle | Mina Mohammed Jawad Lamees A. Abdullah Fabrication of Different Types of Photodetectors Based on Carbon Quantum Dots/Alq3 Organic Material Iraqi Journal of Physics Photodetector Drop Casting Spin Coating Carbon Quantum Dots Alq3 |
| title | Fabrication of Different Types of Photodetectors Based on Carbon Quantum Dots/Alq3 Organic Material |
| title_full | Fabrication of Different Types of Photodetectors Based on Carbon Quantum Dots/Alq3 Organic Material |
| title_fullStr | Fabrication of Different Types of Photodetectors Based on Carbon Quantum Dots/Alq3 Organic Material |
| title_full_unstemmed | Fabrication of Different Types of Photodetectors Based on Carbon Quantum Dots/Alq3 Organic Material |
| title_short | Fabrication of Different Types of Photodetectors Based on Carbon Quantum Dots/Alq3 Organic Material |
| title_sort | fabrication of different types of photodetectors based on carbon quantum dots alq3 organic material |
| topic | Photodetector Drop Casting Spin Coating Carbon Quantum Dots Alq3 |
| url | https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/1272 |
| work_keys_str_mv | AT minamohammedjawad fabricationofdifferenttypesofphotodetectorsbasedoncarbonquantumdotsalq3organicmaterial AT lameesaabdullah fabricationofdifferenttypesofphotodetectorsbasedoncarbonquantumdotsalq3organicmaterial |