TITLE

High response organic ultraviolet photodetector based on blend of 4,4′,4″-tri-(2-methylphenyl phenylamino) triphenylaine and tris-(8-hydroxyquinoline) gallium

AUTHOR(S)
Zisheng Su; Wenlian Li; Bei Chu; Tianle Li; Jianzhuo Zhu; Guang Zhang; Fei Yan; Xiao Li; Yiren Chen; Lee, Chun-Sing
PUB. DATE
September 2008
SOURCE
Applied Physics Letters;9/8/2008, Vol. 93 Issue 10, p103309
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The authors demonstrate high response organic ultraviolet (UV) photodetector (PD) using 4,4′,4″-tri-(2-methylphenyl phenylamino) triphenylaine (m-MTDATA) and tris-(8-hydroxyquinoline) gallium (Gaq3) to act as the electron donor and acceptor, respectively. The m-MTDATA:Gaq3 blend device shows a photocurrent of 405 μA/cm-2 at -8 V, corresponding to a response of 338 mA/W under an illumination of 365 nm UV light with an intensity of 1.2 mW/cm2. The high response is attributed to the enhanced dissociation of geminate hole-electron pairs in the distributed heterojunction of the blend and suppression of radiative decay. Photophysics of the PD involved is also discussed in terms of the performance and device structures.
ACCESSION #
34449597

 

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