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Energy/hole Transfer Phenomena in Hybrid α-sexithiophene (α-STH) nanoparticle-CdTe Quantum-Dot Nanocomposites

Energy/hole Transfer Phenomena in Hybrid α-sexithiophene (α-STH) nanoparticle-CdTe Quantum-Dot Nanocomposites

Santanu Bhattacharyya, Bipattaran Paramanik, Simanta Kundu, Amitava Patra

Chemphyschem. 2012 Dec 21;13(18):4155-62.

PMID: 23165983

Abstract:

Considerable attention has been paid to hybrid organic-inorganic nanocomposites for designing new optical materials. Herein, we demonstrate the energy and hole transfer of hybrid hole-transporting α-sexithiophene (α-STH) nanoparticle-CdTe quantum dot (QD) nanocomposites using steady-state and time-resolved spectroscopy. Absorption and photoluminescence studies confirm the loss of planarity of the α-sexithiophene molecule due to the formation of polymer nanoparticles. Upon photoexcitation at 370 nm, a nonradiative energy transfer (73 %) occurs from the hole-transporting α-STH nanoparticles to the CdTe nanoparticles with a rate of energy transfer of 6.13×10(9) s(-1). However, photoluminescence quenching of the CdTe QDs in the presence of the hole-transporting α-STH nanoparticles is observed at 490 nm excitation, which is due to both static-quenching and hole-transfer-based dynamic-quenching phenomena. The calculated hole-transporting rate is 7.13×10(7) s(-1) in the presence of 42×10(-8) M α-STH nanoparticles. Our findings suggest that the interest in α-sexithiophene (α-STH) nanoparticle-CdTe QD hybrid nanocomposites might grow in the coming years because of various potential applications, such as solar cells, optoelectronic devices, and so on.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP88493554	α-Sexithiophene		88493-55-4	Price

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