Issue 1, 2013
From the journal:

Nanoscale

Few layer graphene to graphitic films: infrared photoconductive versus bolometric response†

Narendra Kurra,a   Venkata Srinu Bhadram,a   Chandrabhas Narayanaa  and  Giridhar U. Kulkarni*a  

* Corresponding authors

a Chemistry & Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560 064, India
E-mail: kulkarni@jncasr.ac.in
Fax: +91 (80)22082766
Tel: +91 (80)22082814

Abstract

We report a comparative study of the performance of infrared (IR) photoconductive and bolometric detectors fabricated from few layer graphene (FLG) to graphitic films obtained by different methods. FLG films grown directly on insulating substrates with the aid of residual hydrocarbons and polymethylmethacrylate (PMMA) carbon sources show an IR photoresponse of 73% which is far higher compared to the FLG films (6–14%) obtained by CVD and Scotch tape methods. The photoconductive nature of FLG films is due to generation of photoexcited charge carriers. On the other hand, the photoresponse of the bulk graphitic films is bolometric in nature where the resistance changes are due to thermal effects. The IR photoresponse from these graphitic films is correlated with the Raman peak intensities which are very sensitive to the nature of the FLG.

Graphical abstract: Few layer graphene to graphitic films: infrared photoconductive versus bolometric response

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Article information

DOI
https://doi.org/10.1039/C2NR32861E
Article type
Paper
Submitted
21 Sep 2012
Accepted
05 Nov 2012
First published
06 Nov 2012

Nanoscale, 2013,5, 381-389

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Few layer graphene to graphitic films: infrared photoconductive versus bolometric response

N. Kurra, V. S. Bhadram, C. Narayana and G. U. Kulkarni, Nanoscale, 2013, 5, 381 DOI: 10.1039/C2NR32861E

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