Science China Technological Sciences

, Volume 55, Issue 6, pp 1551–1555 | Cite as

Organic photodetectors based on transparent electrodes for application in ultraviolet light detection

  • Qian Dai
  • Lu Zhu
  • Jian Sun
  • XiQing Zhang
  • YongSheng Wang
Article
First Online:
Received:
Accepted:

Abstract

A high performance heterojunction organic ultraviolet photodetector based on NPB and Bphen has been fabricated. A transparent conducting polymer PEDOT:PSS coated quartz substrate instead of ITO coated glass substrate as anode is propitious to detect shorter wavelength ultraviolet light. As a result, the device shows a low dark current density, a high responsivity of 502 mA/W and a detectivity of 2.67×1012 cm Hz1/2/W which is illuminated by a 220 nm ultraviolet light with an intensity of 1.6 mW/cm2. Moreover, the performance of the PEDOT:PSS transparent electrode device is better than the semi-transparent Al electrode device electrode because of the higher transmittance and electrode properties.

Keywords

ultraviolet photodetector conducting polymer PEDOT: PSS 
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Razeghi M, Rogalski A. Semiconductor ultraviolet detectors. J Appl Phys, 1996, 79: 7433–7473CrossRefGoogle Scholar
  2. 2.
    Liao M, Koide Y, Alvarez J. Photovoltaic Schottky ultraviolet detectors fabricated on boron-doped homoepitaxial diamond layer. Appl Phys Lett, 2006, 88: 033504CrossRefGoogle Scholar
  3. 3.
    Dahal R, Tahtamouni T M, Fan Z, et al. Hybrid AlN-SiC deep ultraviolet Schottky barrier photodetectors. Appl Phys Lett, 2007, 90: 263505CrossRefGoogle Scholar
  4. 4.
    Mazzeo G, Conte G, Reverchon J L, et al. Deep ultraviolet detection dynamics of AlGaN based devices. Appl Phys Lett, 2006, 89: 223513CrossRefGoogle Scholar
  5. 5.
    Li J, Fan Z, Dahal R, et al. 200 nm deep ultraviolet photodetectors based on AlN. Appl Phys Lett, 2006, 89: 213510CrossRefGoogle Scholar
  6. 6.
    Chen L, Li W, Wei H, et al. Organic ultraviolet photovoltaic diodes based on copper phthalocyanine as an electron acceptor. Sol Energy Mater Sol Cells, 2006, 90: 1788–1796CrossRefGoogle Scholar
  7. 7.
    Kong Z, Li W, Che G, et al. Highly sensitive organic ultraviolet optical sensor based on phosphorescent Cu (I) complex. Appl Phys Lett, 2006, 89: 161112CrossRefGoogle Scholar
  8. 8.
    Ray D, Narasimhan K L. High response organic visible-blind ultraviolet detector. Appl Phys Lett, 2007, 91: 093516CrossRefGoogle Scholar
  9. 9.
    Han Y, Wu G, Wang M, et al. High efficient UV-A photodetectors based on monodispersed ligand-capped TiO2 nanocrystals and polyfluorene hybrids. Polymer, 2010, 51: 3736–3743CrossRefGoogle Scholar
  10. 10.
    Han Y, Wu G, Li H, et al. Highly efficient ultraviolet photodetectors based on TiO2 nanocrystal-polymer composites via wet processing. Nanotechnology, 2010, 21: 185708CrossRefGoogle Scholar
  11. 11.
    Li H, Wu G, Shi M, et al. Synthesis of solution processable ultraviolet sensitive organic molecules and their application in hybrid UV photodetector. Synthetic Metals, 2010, 160: 1648–1653CrossRefGoogle Scholar
  12. 12.
    Li H, Wu G, Chen H, et al. Spectral response tuning and realization of quasi-solar-blind detection in organic ultraviolet photodetectors. Org Electron, 2011, 12: 70–77CrossRefGoogle Scholar
  13. 13.
    Yan F, Liu H, Li W, et al. Double wavelength ultraviolet light sensitive organic photodetector. Appl Phys Lett 2009, 95: 253308CrossRefGoogle Scholar
  14. 14.
    Wu S, Li W, Chu B, et al. High response deep ultraviolet organic photodetector with spectrum peak focused on 280 nm. Appl Phys Lett 2010, 96: 093302CrossRefGoogle Scholar
  15. 15.
    Hau S K, Yip H L, Zou J, et al. Indium tin oxide-free semi-transparent inverted polymer solar cells using conducting polymer as both bottom and top electrodes. Org Electron, 2009, 10: 1401–1407CrossRefGoogle Scholar
  16. 16.
    Kim Y S, Oh S B, Park J H, et al. Highly conductive PEDOT/silicate hybrid anode for ITO-free polymer solar cells. Sol Energy Mater Sol Cells, 2010, 94: 471–477CrossRefGoogle Scholar
  17. 17.
    Girtan M, Rusu M. Role of ITO and PEDOT:PSS in stability/degradation of polymer: Fullerene bulk heterojunctions solar cells. Sol Energy Mater Sol Cells, 2010, 94: 446–450CrossRefGoogle Scholar
  18. 18.
    Kirchmeyer S, Reuter K. Scientific importance, properties and growing applications of poly(3,4-ethylenedioxythiophene). J Mater Chem, 2005, 15: 2077–2088CrossRefGoogle Scholar
  19. 19.
    Kanaan H, Jolinat P, Ablart G, et al. Influence of poly (3,4-ethylenedioxythiophene)-poly(styrenesulfonate) in polyfluorene based light-emitting diodes: Evidence of charge trapping at the organic interface. Org Electron, 2010, 11: 1047–1052CrossRefGoogle Scholar
  20. 20.
    Schlaf R, Parkinson B A, Lee P A, et al. Photoemission spectroscopy of LiF coated Al and Pt electrodes. J Appl Phys 1998, 84: 6729–6736CrossRefGoogle Scholar
  21. 21.
    Wang S, Fung M, Lai S, et al. Experimental study of a chemical reaction between LiF and Al. J Appl Phys 2003, 94: 169–173CrossRefGoogle Scholar
  22. 22.
    Kim J, Jung J, Lee D, et al. Enhancement of electrical conductivity of poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) by a change of solvents. Synthetic Metals, 2002, 126: 311–316MATHCrossRefGoogle Scholar
  23. 23.
    Ouyang J, Xu Q, Chu C, et al. On the mechanism of conductivity enhancement in poly(3,4-ethylenedioxy thiophene):poly(styrene sulfonate) film through solvent treatment. Polymer, 2004, 45: 8443–8450CrossRefGoogle Scholar
  24. 24.
    Dong Q, Zhou Y, Pei J, et al. All-spin-coating vacuum-free processed semi-transparent inverted polymer solar cells with PEDOT:PSS anode and PAH-D interfacial layer. Org Electron, 2010, 11: 1327–1331CrossRefGoogle Scholar
  25. 25.
    Sze S M. Physics of Semiconductor Devices. 3rd ed. New York: John Wiley & Sons, Inc, 2007Google Scholar

Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Qian Dai
    • 1
  • Lu Zhu
    • 1
  • Jian Sun
    • 1
  • XiQing Zhang
    • 1
  • YongSheng Wang
    • 1
  1. 1.Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic TechnologyBeijing Jiaotong UniversityBeijingChina

Personalised recommendations