MEH-PPV/Alq3-based bulk heterojunction photodetector

doi:10.1088/1674-1056/22/10/100701

中国物理B ›› 2013, Vol. 22 ›› Issue (10): 100701-100701.doi: 10.1088/1674-1056/22/10/100701

MEH-PPV/Alq₃-based bulk heterojunction photodetector

Zubair Ahmad^a, Mahdi Hasan Suhail^b, Issam Ibrahim Muhammad^b, Wissam Khayer Al-Rawi^c, Khaulah Sulaiman^a, Qayyum Zafar^a, Ahmad Sazali Hamzah^d, Zurina Shaameri^d

a Low Dimensional Materials Research Center, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia;
b Department of Physics, College of Science, University of Baghdad, Iraq;
c Department of Physics, College of Science, University of Anbar, Iraq;
d Organic Synthesis Laboratory, Institute of Science, Universiti Teknologi MARA, 40450 Shah Alam, Malaysia

收稿日期:2013-02-04 修回日期:2013-04-19 出版日期:2013-08-30 发布日期:2013-08-30
基金资助:
Project supported by the Long Term Research Grant Scheme (LRGS), Ministry of Higher Education, Malaysia (Grant No. LR003/2011A).

MEH-PPV/Alq₃-based bulk heterojunction photodetector

Zubair Ahmad^a, Mahdi Hasan Suhail^b, Issam Ibrahim Muhammad^b, Wissam Khayer Al-Rawi^c, Khaulah Sulaiman^a, Qayyum Zafar^a, Ahmad Sazali Hamzah^d, Zurina Shaameri^d

a Low Dimensional Materials Research Center, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia;
b Department of Physics, College of Science, University of Baghdad, Iraq;
c Department of Physics, College of Science, University of Anbar, Iraq;
d Organic Synthesis Laboratory, Institute of Science, Universiti Teknologi MARA, 40450 Shah Alam, Malaysia

Received:2013-02-04 Revised:2013-04-19 Online:2013-08-30 Published:2013-08-30
Contact: Zubair Ahmad E-mail:zubairtarar@um.edu.my
Supported by:
Project supported by the Long Term Research Grant Scheme (LRGS), Ministry of Higher Education, Malaysia (Grant No. LR003/2011A).

摘要/Abstract

摘要： In this paper, we present the effect of varied illumination levels on the electrical properties of the organic blend bulk heterojuction (BHJ) photodiode. To prepare the BHJ blend, poly(2-methoxy-5(2’-ethylhexyloxy) phenylenevinylene (MEH-PPV) and aluminum-tris-(8-hydroxyquinoline) (Alq₃) are used as donor and acceptor materials, respectively. In order to fabricate the photodiode, a 40-nm thick film of poly(3, 4-ethylendioxythiophene):poly(styrensulfonate) (PEDOT:PSS) is primarily deposited on a cleaned ITO coated glass substrate by spin coating technique. The organic photosensitive blend is later spun coated on the PEDOT:PSS layer, followed by the lithium fluoride (LiF) and aluminium (Al) thin films deposition by thermal evaporation. The optical properties of the MEH-PPV:Alq₃ blend thin films are investigated using photoluminescence (PL) and UV-Vis spectroscopy. The photodiode shows good photo-current response as a function of variable illumination levels. The responsivity value ～ 8 mA/W at 3 V is found and the ratio of photo-current to dark current (I_Ph/I_Dark) is found to be 1.24.

关键词: MEH-PPV, Alq₃, bulk heterojunction, photodiode

Abstract: In this paper, we present the effect of varied illumination levels on the electrical properties of the organic blend bulk heterojuction (BHJ) photodiode. To prepare the BHJ blend, poly(2-methoxy-5(2’-ethylhexyloxy) phenylenevinylene (MEH-PPV) and aluminum-tris-(8-hydroxyquinoline) (Alq₃) are used as donor and acceptor materials, respectively. In order to fabricate the photodiode, a 40-nm thick film of poly(3, 4-ethylendioxythiophene):poly(styrensulfonate) (PEDOT:PSS) is primarily deposited on a cleaned ITO coated glass substrate by spin coating technique. The organic photosensitive blend is later spun coated on the PEDOT:PSS layer, followed by the lithium fluoride (LiF) and aluminium (Al) thin films deposition by thermal evaporation. The optical properties of the MEH-PPV:Alq₃ blend thin films are investigated using photoluminescence (PL) and UV-Vis spectroscopy. The photodiode shows good photo-current response as a function of variable illumination levels. The responsivity value ～ 8 mA/W at 3 V is found and the ratio of photo-current to dark current (I_Ph/I_Dark) is found to be 1.24.

Key words: MEH-PPV, Alq₃, bulk heterojunction, photodiode

中图分类号: (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)

07.07.Df

42.79.Pw (Imaging detectors and sensors) 42.70.Jk (Polymers and organics) 81.05.Fb (Organic semiconductors)

Zubair Ahmad, Mahdi Hasan Suhail, Issam Ibrahim Muhammad, Wissam Khayer Al-Rawi, Khaulah Sulaiman, Qayyum Zafar, Ahmad Sazali Hamzah, Zurina Shaameri. MEH-PPV/Alq₃-based bulk heterojunction photodetector[J]. 中国物理B, 2013, 22(10): 100701-100701.

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MEH-PPV/Alq₃-based bulk heterojunction photodetector

MEH-PPV/Alq₃-based bulk heterojunction photodetector

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