4.5 Article

High response visible-blind organic ultraviolet photodetector based on excellent photovoltaic characteristics of a Cu(I) complex

Journal

INORGANICA CHIMICA ACTA
Volume 444, Issue -, Pages 126-130

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2016.01.035

Keywords

High response; Organic ultraviolet photodetectors; Cu(I) complex

Funding

  1. National Natural Science Foundation [61405071]
  2. Jilin Provincal Science & Technology Department [201215219, 20130521019JH, 20140101206JC]
  3. Science and Technology Project of Jilin Education Bureau [2014152, 2015223]
  4. Ph.D. Innovation Programs Foundation of Jiangsu Province of China [CXLX13_663]

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The phosphorescent Cu(I) complex, [Cu(Bphen)(DPEphos)]BF4 (CuDB) (Bphen = bathophenanthroline, DPEphos = bis[2-(diphenylphosphino) phenyl] ether) has been successfully synthesized and characterised by X-ray single crystal diffraction method. The highly efficient visible-blind ultraviolet organic photodetectors with a peak photoresponse of 316 mA/W using m-MTDATA as the electron donor (D) and CuDB as the electron acceptor (A) was demonstrated. Furthermore, by incorporating 1,3,5-tris(N-phenyl-benzimidazol-2-yl) benzene (TPBi) as an exciton blocking layer (EBL) inserted between CuDB and the cathode, the power conversion efficiency (PCE) of photovoltaic (PV) device based on CuDB was substantially improved to 6.73% which showed a 137% increase over that of device without EBL. Photophysics of the OUV-PDs and PV devices involved were discussed in terms of the device performance and structures. (C) 2016 Elsevier B.V. All rights reserved.

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