Colloidal Mn-doped cesium lead halide perovskite nanoplatelets

Wasim J. Mir; Metikoti Jagadeeswararao; Shyamashis Das; Angshuman Nag

doi:10.1021/acsenergylett.6b00741

Colloidal Mn-doped cesium lead halide perovskite nanoplatelets

Wasim J. Mir, Metikoti Jagadeeswararao, Shyamashis Das, Angshuman Nag^*

^*Corresponding author for this work

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

355 Scopus citations

Abstract

Strong quantum confinement in Mn-doped semiconductor nanocrystals enhances dopant-carrier exchange interactions. Here, we report the synthesis and optical properties of strongly quantum confined, quasi two-dimensional, Mn-doped CsPbCl₃ nanoplatelets. A room-temperature synthesis was employed to prepare the platelets with thickness 2.2 nm (4 monolayers), which is significantly smaller than the Bohr excitonic diameter of CsPbCl₃ (5 nm). Efficient transfer of excitonic energy from the host to the Mn²⁺ dopant ions leads to a spin-forbidden ⁴T₁-⁶A₁ Mn d-electron emission with the highest quantum yield of ∼20% and exhibits a long lifetime of 1.6 ms. Subsequent anion exchange reactions at room temperature lead to the formation of Mn-doped CsPbBr3 nanoplatelets, with weak Mn emission. These newly developed Mn-doped cesium lead halide nanoplatelets are suitable candidates for exploring the effects of quantum confinement on dopant-carrier exchange interaction and exhibiting interesting magneto-optic properties.

Original language	English (US)
Pages (from-to)	537-543
Number of pages	7
Journal	ACS Energy Letters
Volume	2
Issue number	3
DOIs	https://doi.org/10.1021/acsenergylett.6b00741
State	Published - Mar 10 2017

ASJC Scopus subject areas

Chemistry (miscellaneous)
Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Materials Chemistry

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10.1021/acsenergylett.6b00741

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title = "Colloidal Mn-doped cesium lead halide perovskite nanoplatelets",

abstract = "Strong quantum confinement in Mn-doped semiconductor nanocrystals enhances dopant-carrier exchange interactions. Here, we report the synthesis and optical properties of strongly quantum confined, quasi two-dimensional, Mn-doped CsPbCl3 nanoplatelets. A room-temperature synthesis was employed to prepare the platelets with thickness 2.2 nm (4 monolayers), which is significantly smaller than the Bohr excitonic diameter of CsPbCl3 (5 nm). Efficient transfer of excitonic energy from the host to the Mn2+ dopant ions leads to a spin-forbidden 4T1-6A1 Mn d-electron emission with the highest quantum yield of ∼20% and exhibits a long lifetime of 1.6 ms. Subsequent anion exchange reactions at room temperature lead to the formation of Mn-doped CsPbBr3 nanoplatelets, with weak Mn emission. These newly developed Mn-doped cesium lead halide nanoplatelets are suitable candidates for exploring the effects of quantum confinement on dopant-carrier exchange interaction and exhibiting interesting magneto-optic properties.",

author = "Mir, {Wasim J.} and Metikoti Jagadeeswararao and Shyamashis Das and Angshuman Nag",

note = "Funding Information: A.N. acknowledges Science and Engineering Research Board (SERB) for Ramanujan Fellowship (SR/S2/RJN-61/2012). W.J.M. and M.J. acknowledge CSIR, Govt. of India, for Ph.D. research fellowship. Authors acknowledge SAIF, IIT-Bombay for X-band EPR and ICP-OES measurements. Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

month = mar,

day = "10",

doi = "10.1021/acsenergylett.6b00741",

language = "English (US)",

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journal = "ACS Energy Letters",

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T1 - Colloidal Mn-doped cesium lead halide perovskite nanoplatelets

AU - Mir, Wasim J.

AU - Jagadeeswararao, Metikoti

AU - Das, Shyamashis

AU - Nag, Angshuman

N1 - Funding Information: A.N. acknowledges Science and Engineering Research Board (SERB) for Ramanujan Fellowship (SR/S2/RJN-61/2012). W.J.M. and M.J. acknowledge CSIR, Govt. of India, for Ph.D. research fellowship. Authors acknowledge SAIF, IIT-Bombay for X-band EPR and ICP-OES measurements. Publisher Copyright: © 2017 American Chemical Society.

PY - 2017/3/10

Y1 - 2017/3/10

N2 - Strong quantum confinement in Mn-doped semiconductor nanocrystals enhances dopant-carrier exchange interactions. Here, we report the synthesis and optical properties of strongly quantum confined, quasi two-dimensional, Mn-doped CsPbCl3 nanoplatelets. A room-temperature synthesis was employed to prepare the platelets with thickness 2.2 nm (4 monolayers), which is significantly smaller than the Bohr excitonic diameter of CsPbCl3 (5 nm). Efficient transfer of excitonic energy from the host to the Mn2+ dopant ions leads to a spin-forbidden 4T1-6A1 Mn d-electron emission with the highest quantum yield of ∼20% and exhibits a long lifetime of 1.6 ms. Subsequent anion exchange reactions at room temperature lead to the formation of Mn-doped CsPbBr3 nanoplatelets, with weak Mn emission. These newly developed Mn-doped cesium lead halide nanoplatelets are suitable candidates for exploring the effects of quantum confinement on dopant-carrier exchange interaction and exhibiting interesting magneto-optic properties.

AB - Strong quantum confinement in Mn-doped semiconductor nanocrystals enhances dopant-carrier exchange interactions. Here, we report the synthesis and optical properties of strongly quantum confined, quasi two-dimensional, Mn-doped CsPbCl3 nanoplatelets. A room-temperature synthesis was employed to prepare the platelets with thickness 2.2 nm (4 monolayers), which is significantly smaller than the Bohr excitonic diameter of CsPbCl3 (5 nm). Efficient transfer of excitonic energy from the host to the Mn2+ dopant ions leads to a spin-forbidden 4T1-6A1 Mn d-electron emission with the highest quantum yield of ∼20% and exhibits a long lifetime of 1.6 ms. Subsequent anion exchange reactions at room temperature lead to the formation of Mn-doped CsPbBr3 nanoplatelets, with weak Mn emission. These newly developed Mn-doped cesium lead halide nanoplatelets are suitable candidates for exploring the effects of quantum confinement on dopant-carrier exchange interaction and exhibiting interesting magneto-optic properties.

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JO - ACS Energy Letters

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Colloidal Mn-doped cesium lead halide perovskite nanoplatelets

Abstract

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