Chawla , Parul and Singh, Son and Sharma, Shailesh Narain (2014) An insight into the mechanism of charge-transfer of hybrid polymer: ternary/quaternary chalcopyrite colloidal nanocrystals. Beilstein Journal of Nanotechnology, 5. pp. 1235-1244. ISSN 2190-4286

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In this work, we have demonstrated the structural and optoelectronic properties of the surface of ternary/quaternary (CISe/CIGSe/CZTSe) chalcopyrite nanocrystallites passivated by tri-n-octylphosphine-oxide (TOPO) and tri-n-octylphosphine (TOP) and compared their charge transfer characteristics in the respective polymer: chalcopyrite nanocomposites by dispersing them in poly(3-hexylthiophene) polymer. It has been found that CZTSe nanocrystallites due to their high crystallinity and well-ordered 3-dimensional network in its pristine form exhibit a higher steric- and photo-stability, resistance against coagulation and homogeneity compared to the CISe and CIGSe counterparts. Moreover, CZTSe nanocrystallites display efficient photoluminescence quenching as evident from the high value of the Stern-Volmer quenching constant (K-SV) and eventually higher charge transfer efficiency in their respective polymer P3HT:CZTSe composites. We modelled the dependency of the charge transfer from the donor and the charge separation mechanism across the donor-acceptor interface from the extent of crystallinity of the chalcopyrite semiconductors (CISe/CIGSe/CZTSe). Quaternary CZTSe chalcopyrites with their high crystallinity and controlled morphology in conjunction with regioregular P3HT polymer is an attractive candidate for hybrid solar cells applications

Item Type: Article
Uncontrolled Keywords: chalcopyrites; charge-transfer; hybrid organic-inorganic; nanocomposites; P3HT
Subjects: Materials Science
Depositing User: Dr. Rajpal Walke
Date Deposited: 09 Sep 2015 06:34
Last Modified: 09 Sep 2015 06:34

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