Organic Deep Ultraviolet Photodetector With Response Peak Focusing on 270 nm Using the Acceptor BAlq

An organic deep ultraviolet (DUV) photodetector (PD) with a response peak at 270 nm was fabricated. NPB and BAlq were employed as electron donor and acceptor, respectively, and polymer PEDOT:PSS was used as the transparent anode. The peak response of 0.14 A/W under illumination of 270-nm light with...

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Published in:IEEE photonics technology letters 2011-12, Vol.23 (23), p.1835-1837
Main Authors: Zhu, Lu, Dai, Qian, Hu, Zuo-fu, Zhang, Xi-qing, Wang, Yong-sheng
Format: Article
Language:English
Subjects:
Absorption
Anodes
BAlq
Conferences
Dark current
deep ultraviolet (DUV)
Fiber optics
Focusing
Lighting
Optical fibers
organic photodetector (OPD)
PEDOT:PSS
Photoconductivity
Photodetectors
Polymers
Transmittance
Ultraviolet
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cited_by cdi_FETCH-LOGICAL-c323t-1f6e558e6e2f4cb22913ab1b2ccb20feafd4ecb73994370d4e1420f69a19d2263
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container_end_page 1837
container_issue 23
container_start_page 1835
container_title IEEE photonics technology letters
container_volume 23
creator Zhu, Lu
Dai, Qian
Hu, Zuo-fu
Zhang, Xi-qing
Wang, Yong-sheng
description An organic deep ultraviolet (DUV) photodetector (PD) with a response peak at 270 nm was fabricated. NPB and BAlq were employed as electron donor and acceptor, respectively, and polymer PEDOT:PSS was used as the transparent anode. The peak response of 0.14 A/W under illumination of 270-nm light with an intensity of 1.35 mW/cm 2 and a detectivity of 8.26×10 11 cmHz 1/2 W -1 at -12 V were achieved, and the corresponding quantum efficiency η reaches 64.3%. The PDs exhibit a low dark current of 8.97×10 -8 A/cm 2 , and the photo-to-dark current ratio is about 2.1×10 3 at -12 V. The realization of DUV detection is attributed to the strong absorption of shorter UV wavelengths of acceptor BAlq and high transmittance of PEDOT:PSS anode in DUV region. The mechanism of harvesting high performance is also discussed in detail.
doi_str_mv 10.1109/LPT.2011.2170192
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subjects Absorption
Anodes
BAlq
Conferences
Dark current
deep ultraviolet (DUV)
Fiber optics
Focusing
Lighting
Optical fibers
organic photodetector (OPD)
PEDOT:PSS
Photoconductivity
Photodetectors
Polymers
Transmittance
Ultraviolet
title Organic Deep Ultraviolet Photodetector With Response Peak Focusing on 270 nm Using the Acceptor BAlq
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