Planar Heterojunction Organic Photodetectors Based on Fullerene and Non-fullerene Acceptor Bilayers for a Tunable Spectral Response

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

7 Scopus Citations
View graph of relations

Author(s)

  • Bin Zhang
  • Yun Li
  • Yao Ma
  • Ruoxi Xia
  • Xin Li
  • Fang Wan
  • Liang Shen
  • Yongbo Yuan
  • Zuo-Quan Jiang
  • Anlian Pan
  • Bin Yang

Detail(s)

Original languageEnglish
Pages (from-to)55064-55071
Journal / PublicationACS Applied Materials & Interfaces
Volume12
Issue number49
Online published24 Nov 2020
Publication statusPublished - 9 Dec 2020
Externally publishedYes

Abstract

Planar heterojunction (PHJ) organic photodetectors are potentially more stable than traditional bulk heterojunction counterparts because of the absence of uncontrolled phase separation in the donor and acceptor binary blend system. This work reports a new class of PHJ organic photodetectors based on the medium-band gap fullerene C60 and low-band gap fused-ring non-fullerene acceptor ID-MeIC bilayer structure, which allows a wide range of spectral response tuning across the UV-visible-near-infrared (UV-vis-NIR) region by tailoring individual layer thickness. The C60 layer not only increases the external quantum efficiency at 745 nm by 57% but also reduces dark currents by two orders of magnitude. More importantly, the p-type poly[N,N′-bis(4-butylphenyl)-N,N′-bis(phenyl)-benzi] is found to be the key compound to conduct the layer-by-layer fabrication as combined with n-type ID-MeIC for higher charge extraction efficiency. In light of the above information, PHJ organic photodetectors exhibited a specific detectivity of 6.5 × 1010 Jones to detect NIR light at 745 nm under -0.1 V. The linear dynamic range was estimated to be 80 dB. This work has demonstrated a feasible approach to develop a PHJ architecture with tunable spectral response in the UV-vis-NIR range toward long-term stable organic photodetectors for potential applications in flexible and wearable biomedical sensors.

Research Area(s)

  • fullerene, non-fullerene acceptor, organic photodetector, planar heterojunction

Citation Format(s)

Planar Heterojunction Organic Photodetectors Based on Fullerene and Non-fullerene Acceptor Bilayers for a Tunable Spectral Response. / Zhang, Bin; Li, Yun; Ma, Yao; Xia, Ruoxi; Li, Xin; Wan, Fang; Shen, Liang; Yip, Hin-Lap; Yuan, Yongbo; Jiang, Zuo-Quan; Pan, Anlian; Yang, Bin.

In: ACS Applied Materials & Interfaces, Vol. 12, No. 49, 09.12.2020, p. 55064-55071.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review