Synthesis and Characterization of InP Quantum Dots

Olga I. Mićić; Calvin J. Curtis; Kim M. Jones; Julian R. Sprague; Arthur J. Nozik

doi:10.1021/j100070a004

Synthesis and Characterization of InP Quantum Dots

Olga I. Mićić, Calvin J. Curtis, Kim M. Jones, Julian R. Sprague, Arthur J. Nozik

Chemistry and Nanoscience

National Renewable Energy Laboratory

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Abstract

Colloidal dispersions of quantum dots (QDs) of crystalline InP were synthesized starting from a chloroindium oxalate complex and P(SiMe₃)₃. An InP precursor was formed from the reactants at room temperature; heating the precursor in a solution of trioctylphosphine oxide at 270°C for several days produced InP QDs with a mean diameter of 26.1 ± 7.5 Å (determined by counting lattice fringes in a TEM micrograph). From the known QD size distribution and its absorption spectrum, we used a theoretical model to calculate the dependence of InP QD bandgap on QD size. From these results we could then calculate the size distribution of any InP colloid from its absorption spectrum. It was found that preparing the InP precursor with an excess of In³⁺ and then heating it in a mixture of trioctylphosphine oxide and trioctylphosphine at 270°C for 3 days produced a very narrow QD size distribution with a mean diameter of 25 ± 1.9 Å.

Original language	American English
Pages (from-to)	4966-4969
Number of pages	4
Journal	Journal of Physical Chemistry
Volume	98
Issue number	19
DOIs	https://doi.org/10.1021/j100070a004 https://doi.org/10.1021/j100070a004
State	Published - 1994

NREL Publication Number

ACNR/JA-15877

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title = "Synthesis and Characterization of InP Quantum Dots",

abstract = "Colloidal dispersions of quantum dots (QDs) of crystalline InP were synthesized starting from a chloroindium oxalate complex and P(SiMe3)3. An InP precursor was formed from the reactants at room temperature; heating the precursor in a solution of trioctylphosphine oxide at 270°C for several days produced InP QDs with a mean diameter of 26.1 ± 7.5 {\AA} (determined by counting lattice fringes in a TEM micrograph). From the known QD size distribution and its absorption spectrum, we used a theoretical model to calculate the dependence of InP QD bandgap on QD size. From these results we could then calculate the size distribution of any InP colloid from its absorption spectrum. It was found that preparing the InP precursor with an excess of In3+ and then heating it in a mixture of trioctylphosphine oxide and trioctylphosphine at 270°C for 3 days produced a very narrow QD size distribution with a mean diameter of 25 ± 1.9 {\AA}.",

author = "Mi{\'c}i{\'c}, {Olga I.} and Curtis, {Calvin J.} and Jones, {Kim M.} and Sprague, {Julian R.} and Nozik, {Arthur J.}",

year = "1994",

doi = "10.1021/j100070a004",

language = "American English",

volume = "98",

pages = "4966--4969",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Synthesis and Characterization of InP Quantum Dots

AU - Mićić, Olga I.

AU - Curtis, Calvin J.

AU - Jones, Kim M.

AU - Sprague, Julian R.

AU - Nozik, Arthur J.

PY - 1994

Y1 - 1994

N2 - Colloidal dispersions of quantum dots (QDs) of crystalline InP were synthesized starting from a chloroindium oxalate complex and P(SiMe3)3. An InP precursor was formed from the reactants at room temperature; heating the precursor in a solution of trioctylphosphine oxide at 270°C for several days produced InP QDs with a mean diameter of 26.1 ± 7.5 Å (determined by counting lattice fringes in a TEM micrograph). From the known QD size distribution and its absorption spectrum, we used a theoretical model to calculate the dependence of InP QD bandgap on QD size. From these results we could then calculate the size distribution of any InP colloid from its absorption spectrum. It was found that preparing the InP precursor with an excess of In3+ and then heating it in a mixture of trioctylphosphine oxide and trioctylphosphine at 270°C for 3 days produced a very narrow QD size distribution with a mean diameter of 25 ± 1.9 Å.

AB - Colloidal dispersions of quantum dots (QDs) of crystalline InP were synthesized starting from a chloroindium oxalate complex and P(SiMe3)3. An InP precursor was formed from the reactants at room temperature; heating the precursor in a solution of trioctylphosphine oxide at 270°C for several days produced InP QDs with a mean diameter of 26.1 ± 7.5 Å (determined by counting lattice fringes in a TEM micrograph). From the known QD size distribution and its absorption spectrum, we used a theoretical model to calculate the dependence of InP QD bandgap on QD size. From these results we could then calculate the size distribution of any InP colloid from its absorption spectrum. It was found that preparing the InP precursor with an excess of In3+ and then heating it in a mixture of trioctylphosphine oxide and trioctylphosphine at 270°C for 3 days produced a very narrow QD size distribution with a mean diameter of 25 ± 1.9 Å.

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U2 - 10.1021/j100070a004

DO - 10.1021/j100070a004

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SN - 0022-3654

VL - 98

SP - 4966

EP - 4969

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 19

ER -

Synthesis and Characterization of InP Quantum Dots

Abstract

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