Crumpled Graphene Photodetector with Enhanced, Strain-Tunable, and Wavelength-Selective Photoresponsivity

Pilgyu Kang; Michael Cai Wang; Peter M Knapp; SungWoo Nam

doi:10.1002/adma.201600482

Crumpled Graphene Photodetector with Enhanced, Strain-Tunable, and Wavelength-Selective Photoresponsivity

Adv Mater. 2016 Jun;28(23):4639-45. doi: 10.1002/adma.201600482. Epub 2016 Apr 6.

Authors

Pilgyu Kang¹, Michael Cai Wang¹, Peter M Knapp¹, SungWoo Nam^{1

2}

Affiliations

¹ Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
² Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.

PMID: 27061899
DOI: 10.1002/adma.201600482

Abstract

A stretchable photodetector with enhanced, strain-tunable photoresponsivity is developed based on crumpled graphene by engineering 2D graphene into 3D structures. This crumpled graphene photodetector demonstrates ≈400% enhanced photoresponsivity led by an order-of-magnitude enhanced extinction of graphene and 100% modulation in photoresponsivity with 200% applied strain. Finally, strain-tunable, wavelength-selective photodetection is shown by integrated colloidal photonic crystals-crumpled graphene photodetector devices.

Keywords: crumpled graphene; photodetectors; photonic crystals; photoresponsivity; stretchable.