Wrinkled Single-Crystalline Germanium Nanomembranes for Stretchable Photodetectors

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

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Author(s)

  • Qinglei Guo
  • Yangfu Fang
  • Miao Zhang
  • Gaoshan Huang
  • Yongfeng Mei
  • Zengfeng Di
  • Xi Wang

Detail(s)

Original languageEnglish
Article number7725966
Pages (from-to)1985-1990
Journal / PublicationIEEE Transactions on Electron Devices
Volume64
Issue number5
Publication statusPublished - 1 May 2017

Abstract

Germanium nanomembranes are suitable for flexible electronics, including high-mobility nonsilicon transistors, fast radio-frequency switches, microwave diodes, and high-performance photodetectors. In order to enhance the flexibility of the germanium-based devices, we present a strategy to integrate single-crystalline germanium nanomembranes into a wave-like wrinkled geometry with a uniform periodicity and amplitude on elastomeric substrates. Wrinkled single-crystalline germanium nanomembranes are realized with a reversible and large deformation up to 10%, and the stretchable metal-germanium-metal photodetectors have been demonstrated. Optoelectronic response studies reveal that the wrinkled germanium-based photodetectors exhibit enhanced efficiency of optoelectronic interactions compared with planar photodetectors using flat germanium nanomembranes. Furthermore, the wrinkled photodetectors reveal high response speed and stretchable capability of up to 8.56%. This paper may pave the way for the integration of germanium nanomembranes into the field of flexible/wearable optoelectronics.

Research Area(s)

  • Germanium nanomembranes, light absorption, photodetectors, stretchable electronics, wrinkles

Citation Format(s)

Wrinkled Single-Crystalline Germanium Nanomembranes for Stretchable Photodetectors. / Guo, Qinglei; Fang, Yangfu; Zhang, Miao; Huang, Gaoshan; Chu, Paul K.; Mei, Yongfeng; Di, Zengfeng; Wang, Xi.

In: IEEE Transactions on Electron Devices, Vol. 64, No. 5, 7725966, 01.05.2017, p. 1985-1990.

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