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Hybrid organic-inorganic (MEH-PPV/P3HT:CdSe) nanocomposites: linking film morphology to photostability

Published online by Cambridge University Press:  31 March 2010

S. N. Sharma*
Affiliation:
Electronic Materials Division, National Physical Laboratory, Dr. K.S. Krishnan Marg, 110012 New Delhi, India
U. Kumar
Affiliation:
Electronic Materials Division, National Physical Laboratory, Dr. K.S. Krishnan Marg, 110012 New Delhi, India Department of Chemistry, University of Delhi, 110007 Delhi, India
T. Vats
Affiliation:
Electronic Materials Division, National Physical Laboratory, Dr. K.S. Krishnan Marg, 110012 New Delhi, India University School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, 110403 Delhi, India
M. Arora
Affiliation:
Materials Characterization, National Physical Laboratory, Dr. K.S. Krishnan Marg, 110012 New Delhi, India
V. N. Singh
Affiliation:
Department of Physics, Indian Institute of Technology, 110016 New Delhi, India
B. R. Mehta
Affiliation:
Department of Physics, Indian Institute of Technology, 110016 New Delhi, India
K. Jain
Affiliation:
Electronic Materials Division, National Physical Laboratory, Dr. K.S. Krishnan Marg, 110012 New Delhi, India
R. Kakkar
Affiliation:
Department of Chemistry, University of Delhi, 110007 Delhi, India
A. K. Narula
Affiliation:
University School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, 110403 Delhi, India
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Abstract

In this work, TOPO(tri-octyl phosphine oxide)/TOP(tri-octyl phosphine)-capped cadmium selenide (CdSe) quantum dots (QD's) of varied sizes (5–9 nm) prepared at different input Cd:Se precursor ratio's (1:1–2:1) using chemical route were dispersed in conducting polymer matrices viz poly[2-methoxy,5-(2-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) and poly(3-hexylthiophene) (P3HT) respectively. The properties of polymer:CdSe nanocomposites are evaluated by means of photoluminescence (PL), UV-VIS absorption, Raman, Fourier transform infrared (FTIR), transmission electron microscopy (TEM) and atomic force microscopy (AFM) techniques respectively. The emission and structural properties of polymer-CdSe nanocomposites are found to be dependent on their morphology. The better quality of smallest sized CdSe QD's (size ~5 nm) in conjunction with regioregular P3HT polymer, leads to higher photostability of P3HT:CdSe QD's nanocomposites as compared to that for corresponding MEH-PPV:CdSe nanocomposites, thus making it as an attractive candidate for hybrid solar cells application.

Type
Research Article
Copyright
© EDP Sciences, 2010

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