Semiconductor quantum dot-inorganic nanotube hybrids

Ronen Kreizman; Osip Schwartz; Zvicka Deutsch; Stella Itzhakov; Alla Zak; Sidney R. Cohen; Reshef Tenne; Dan Oron

doi:10.1039/c2cp24043b

Semiconductor quantum dot-inorganic nanotube hybrids

Ronen Kreizman, Osip Schwartz, Zvicka Deutsch, Stella Itzhakov, Alla Zak, Sidney R. Cohen, Reshef Tenne, Dan Oron

Weizmann Institute of Science, Israel

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

A synthetic route for preparation of inorganic WS ₂ nanotube (INT)-colloidal semiconductor quantum dot (QD) hybrid structures is developed, and transient carrier dynamics on these hybrids are studied via transient photoluminescence spectroscopy utilizing several different types of QDs. Measurements reveal efficient resonant energy transfer from the QDs to the INT upon photoexcitation, provided that the QD emission is at a higher energy than the INT direct gap. Charge transfer in the hybrid system, characterized using QDs with band gaps below the INT direct gap, is found to be absent. This is attributed to the presence of an organic barrier layer due to the relatively long-chain organic ligands of the QDs under study. This system, analogous to carbon nanotube-QD hybrids, holds potential for a variety of applications, including photovoltaics, luminescence tagging and optoelectronics. This journal is

Original language	English
Pages (from-to)	4271-4275
Number of pages	5
Journal	Physical Chemistry Chemical Physics
Volume	14
Issue number	12
DOIs	https://doi.org/10.1039/c2cp24043b
Publication status	Published - Mar 28 2012

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1039/c2cp24043b

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abstract = "A synthetic route for preparation of inorganic WS 2 nanotube (INT)-colloidal semiconductor quantum dot (QD) hybrid structures is developed, and transient carrier dynamics on these hybrids are studied via transient photoluminescence spectroscopy utilizing several different types of QDs. Measurements reveal efficient resonant energy transfer from the QDs to the INT upon photoexcitation, provided that the QD emission is at a higher energy than the INT direct gap. Charge transfer in the hybrid system, characterized using QDs with band gaps below the INT direct gap, is found to be absent. This is attributed to the presence of an organic barrier layer due to the relatively long-chain organic ligands of the QDs under study. This system, analogous to carbon nanotube-QD hybrids, holds potential for a variety of applications, including photovoltaics, luminescence tagging and optoelectronics. This journal is",

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AU - Kreizman, Ronen

AU - Schwartz, Osip

AU - Deutsch, Zvicka

AU - Itzhakov, Stella

AU - Zak, Alla

AU - Cohen, Sidney R.

AU - Tenne, Reshef

AU - Oron, Dan

PY - 2012/3/28

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