Abstract
Herein, we fabricated flexible and transparent textured graphene films based on reduced graphene oxide flakes on polyethylene terephthalate substrates using a spray coating technique and investigated their photoresponsivity over a broadband range of wavelengths from the ultraviolet to infrared regions. The fabricated films exhibited a broadband photoresponse, with responsivity values reaching 2.5 mA/W at 365 nm, 2.4 mA/W at 530 nm, and 1.7 mA/W at 940 nm. In addition, the photoresponsivity was studied under bending deformation. Our flexible and textured reduced graphene oxide films could maintain a stable photoresponse upon bending for the radii of curvature larger than ~ 0.35 cm with a photocurrent deviation of <10% in the infrared range. The broadband photoresponse with good flexibility and transparency suggests that the reduced graphene oxide films can have immense potential for applications in flexible optoelectronic technologies.
| Original language | English |
|---|---|
| Article number | 137785 |
| Journal | Thin Solid Films |
| Volume | 697 |
| DOIs | |
| Publication status | Published - 2020 Mar 1 |
Bibliographical note
Funding Information:This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2018R1D1A1B07045581 ) and this research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2017R1A6A3A11028410 ).
Publisher Copyright:
© 2020 Elsevier B.V.
Keywords
- Broadband photodetector
- Flexible substrate
- Graphene
- Reduced graphene oxide
- Textured film
- Transparent substrate
- Wrinkle
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry