Bendability optimization of flexible optical nanoelectronics via neutral axis engineering

Sangmin Lee, Jang Yeon Kwon, Daesung Yoon, Handong Cho, Jinho You, Yong Tae Kang, Dukhyun Choi, Woonbong Hwang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The enhancement of bendability of flexible nanoelectronics is critically important to realize future portable and wearable nanoelectronics for personal and military purposes. Because there is an enormous variety of materials and structures that are used for flexible nanoelectronic devices, a governing design rule for optimizing the bendability of these nanodevices is required. In this article, we suggest a design rule to optimize the bendability of flexible nanoelectronics through neutral axis (NA) engineering. In flexible optical nanoelectronics, transparent electrodes such as indium tin oxide (ITO) are usually the most fragile under an external load because of their brittleness. Therefore, we representatively focus on the bendability of ITO which has been widely used as transparent electrodes, and the NA is controlled by employing a buffer layer on the ITO layer. First, we independently investigate the effect of the thickness and elastic modulus of a buffer layer on the bendability of an ITO film. Then, we develop a design rule for the bendability optimization of flexible optical nanoelectronics. Because NA is determined by considering both the thickness and elastic modulus of a buffer layer, the design rule is conceived to be applicable regardless of the material and thickness that are used for the buffer layer. Finally, our design rule is applied to optimize the bendability of an organic solar cell, which allows the bending radius to reach about 1 mm. Our design rule is thus expected to provide a great strategy to enhance the bending performance of a variety of flexible nanoelectronics.

Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalNanoscale Research Letters
Volume7
DOIs
Publication statusPublished - 2012 Jul 24
Externally publishedYes

Fingerprint

Nanoelectronics
Formability
engineering
indium oxides
tin oxides
optimization
Buffer layers
Tin oxides
Indium
buffers
modulus of elasticity
Elastic moduli
brittleness
electrodes
Electrodes
Brittleness
oxide films
Oxide films
solar cells
Loads (forces)

Keywords

  • Bendability optimization
  • Buffer layer
  • Flexible optical nanoelectronics
  • Neutral axis engineering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Bendability optimization of flexible optical nanoelectronics via neutral axis engineering. / Lee, Sangmin; Kwon, Jang Yeon; Yoon, Daesung; Cho, Handong; You, Jinho; Kang, Yong Tae; Choi, Dukhyun; Hwang, Woonbong.

In: Nanoscale Research Letters, Vol. 7, 24.07.2012, p. 1-18.

Research output: Contribution to journalArticle

Lee, Sangmin ; Kwon, Jang Yeon ; Yoon, Daesung ; Cho, Handong ; You, Jinho ; Kang, Yong Tae ; Choi, Dukhyun ; Hwang, Woonbong. / Bendability optimization of flexible optical nanoelectronics via neutral axis engineering. In: Nanoscale Research Letters. 2012 ; Vol. 7. pp. 1-18.
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