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Dalgleish S, Reissig L, Hu L, et al. Factors affecting the stability and performance of ionic liquid-based planar transient photodetectors. Langmuir. 2015;31(18):5235-43doi: 10.1021/la504972q.
Dalgleish, S., Reissig, L., Hu, L., Matsushita, M. M., Sudo, Y., & Awaga, K. (2015). Factors affecting the stability and performance of ionic liquid-based planar transient photodetectors. Langmuir : the ACS journal of surfaces and colloids, 31(18), 5235-43. https://doi.org/10.1021/la504972q
Dalgleish, Simon, et al. "Factors affecting the stability and performance of ionic liquid-based planar transient photodetectors." Langmuir : the ACS journal of surfaces and colloids vol. 31,18 (2015): 5235-43. doi: https://doi.org/10.1021/la504972q
Dalgleish S, Reissig L, Hu L, Matsushita MM, Sudo Y, Awaga K. Factors affecting the stability and performance of ionic liquid-based planar transient photodetectors. Langmuir. 2015 May 12;31(18):5235-43. doi: 10.1021/la504972q. Epub 2015 Apr 30. PMID: 25895167.
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Langmuir. 2015 May 12;31(18):5235-43. doi: 10.1021/la504972q. Epub 2015 Apr 30.

Factors affecting the stability and performance of ionic liquid-based planar transient photodetectors.

Langmuir : the ACS journal of surfaces and colloids

Simon Dalgleish, Louisa Reissig, Laigui Hu, Michio M Matsushita, Yuki Sudo, Kunio Awaga

Affiliations

  1. ?Institute for Advanced Research, Nagoya University, Furo-cho, Chikusa, 464-8601 Nagoya, Japan.
  2. ?Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, China.
  3. #Division of Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kitaku, 700-8530 Okayama, Japan.

PMID: 25895167 DOI: 10.1021/la504972q

Abstract

A novel planar architecture has been developed for the study of photodetectors utilizing the transient photocurrent response induced by a metal/insulator/semiconductor/metal (MISM) structured device, where the insulator is an ionic liquid (IL-MISM). Using vanadyl 2,3-naphthalocyanine, which absorbs in the communications-relevant near-infrared wavelength region (λ(max,film) ≈ 850 nm), in conjunction with C60 as a bulk heterojunction, the high capacitance of the formed electric double layers at the ionic liquid interfaces yields high charge separation efficiency within the semiconductor layer, and the minimal potential drop in the bulk ionic liquid allows the electrodes to be offset by distances of over 7 mm. Furthermore, the decrease in operational speed with increased electrode separation is beneficial for a clear modeling of the waveform of the photocurrent signal, free from the influence of measurement circuitry. Despite the use of a molecular semiconductor as the active layer in conjunction with a liquid insulating layer, devices with a stability of several days could be achieved, and the operational stability of such devices was shown to be dependent solely on the solubility of the active layer in the ionic liquid, even under atmospheric conditions. Furthermore, the greatly simplified device construction process, which does not rely on transparent electrode materials or direct electrode deposition, provides a highly reproducible platform for the study of the electronic processes within IL-MISM detectors that is largely free from architectural constraints.

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