| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Planar structure of organic photodetector for low dark current |
| Mohammad Nofil1, Amirul Ashraf Md Sabri1, Fadlan Arif Natashah1, Tahani M Bawazeer2, Mohammad S Alsoufi3, Nur Adilah Roslan4,†, and Azzuliani Supangat1,‡ |
1 Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia;
2 Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia;
3 Mechanical Engineering Department, College of Engineering and Islamic Architecture, Umm Al-Qura University, Makkah, Saudi Arabia;
4 Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400, Malaysia |
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Abstract The focus of this study is on investigating the vanadyl 2,9,16,23-tetraphenoxy-29H, 31H-phthalocyanine (VOPcPhO) and its blend with o-xylenyl C60 bis-adduct (OXCBA), for use as a lateral ultraviolet organic photodetector. The research focuses on improving dark current reduction, which is a challenge in lateral organic photodetector. By integrating the OXCBA, low dark current values of 4.83 ${\rm nA}\cdot{\rm cm}^{-2}$ ($D^*_{\rm shot} = 1.414\times 10^{11}~{\rm Jones}$) have been achieved as compared to the stand-alone VoPcPhO device of 14.06 ${\rm nA}\cdot{\rm cm}^{-2}$. The major contributing factors to dark current reduction are due to the efficient charge transfer at the photoactive-electrode interface, the deep highest occupied molecular orbital (HOMO) level of OXCBA, which leads to favorable energy level alignments hindering hole injection, and the occurrence of bulk heterojunction vertical phase segregation between VOPcPhO and OXCBA. These findings shed light on the relationship between the organic photoconductor's material composition, morphology, and performance metrics and open new avenues for metal phthalocyanine-based lateral ultraviolet organic photodetectors with low dark current and enhanced performance.
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Received: 02 July 2024
Revised: 22 November 2024
Accepted manuscript online:
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PACS:
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42.79.Pw
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(Imaging detectors and sensors)
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42.70.Jk
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(Polymers and organics)
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61.82.Fk
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(Semiconductors)
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07.57.Kp
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(Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors)
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| Fund: The authors would like to acknowledge the financial support from the Ministry of Science, Technology and Innovation with Grant No. MOSTI004-2023SRF. |
Corresponding Authors:
Nur Adilah Roslan, Azzuliani Supangat
E-mail: azzuliani@um.edu.my;nur.adilah@upm.edu.my
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Cite this article:
Mohammad Nofil, Amirul Ashraf Md Sabri, Fadlan Arif Natashah, Tahani M Bawazeer, Mohammad S Alsoufi, Nur Adilah Roslan, and Azzuliani Supangat Planar structure of organic photodetector for low dark current 2025 Chin. Phys. B 34 024204
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