Inorganic Halide Perovskites for Efficient Light-Emitting Diodes

Natalia Yantara; Saikat Bhaumik; Fei Yan; Dharani Sabba; Herlina A. Dewi; Nripan Mathews; Pablo P. Boix; Hilmi Volkan Demir; Subodh Mhaisalkar

doi:10.1021/acs.jpclett.5b02011

Inorganic Halide Perovskites for Efficient Light-Emitting Diodes

Natalia Yantara, Saikat Bhaumik, Fei Yan, Dharani Sabba, Herlina A. Dewi, Nripan Mathews^*, Pablo P. Boix, Hilmi Volkan Demir, Subodh Mhaisalkar

^*Corresponding author for this work

Nanyang Technological University

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

526 Citations (Scopus)

Abstract

Lead-halide perovskites have transcended photovoltaics. Perovskite light-emitting diodes (PeLEDs) emerge as a new field to leverage on these fascinating semiconductors. Here, we report the first use of completely inorganic CsPbBr₃ thin films for enhanced light emission through controlled modulation of the trap density by varying the CsBr-PbBr₂ precursor concentration. Although pure CsPbBr₃ films can be deposited from equimolar CsBr-PbBr₂ and CsBr-rich solutions, strikingly narrow emission line (17 nm), accompanied by elongated radiative lifetimes (3.9 ns) and increased photoluminescence quantum yield (16%), was achieved with the latter. This is translated into the enhanced performance of the resulting PeLED devices, with lower turn-on voltage (3 V), narrow electroluminescence spectra (18 nm) and higher electroluminescence intensity (407 Cd/m²) achieved from the CsBr-rich solutions.

Original language	English
Pages (from-to)	4360-4364
Number of pages	5
Journal	Journal of Physical Chemistry Letters
Volume	6
Issue number	21
DOIs	https://doi.org/10.1021/acs.jpclett.5b02011
Publication status	Published - Oct 16 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

ASJC Scopus Subject Areas

General Materials Science
Physical and Theoretical Chemistry

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10.1021/acs.jpclett.5b02011

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title = "Inorganic Halide Perovskites for Efficient Light-Emitting Diodes",

abstract = "Lead-halide perovskites have transcended photovoltaics. Perovskite light-emitting diodes (PeLEDs) emerge as a new field to leverage on these fascinating semiconductors. Here, we report the first use of completely inorganic CsPbBr3 thin films for enhanced light emission through controlled modulation of the trap density by varying the CsBr-PbBr2 precursor concentration. Although pure CsPbBr3 films can be deposited from equimolar CsBr-PbBr2 and CsBr-rich solutions, strikingly narrow emission line (17 nm), accompanied by elongated radiative lifetimes (3.9 ns) and increased photoluminescence quantum yield (16\%), was achieved with the latter. This is translated into the enhanced performance of the resulting PeLED devices, with lower turn-on voltage (3 V), narrow electroluminescence spectra (18 nm) and higher electroluminescence intensity (407 Cd/m2) achieved from the CsBr-rich solutions.",

author = "Natalia Yantara and Saikat Bhaumik and Fei Yan and Dharani Sabba and Dewi, \{Herlina A.\} and Nripan Mathews and Boix, \{Pablo P.\} and Demir, \{Hilmi Volkan\} and Subodh Mhaisalkar",

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doi = "10.1021/acs.jpclett.5b02011",

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AU - Yantara, Natalia

AU - Bhaumik, Saikat

AU - Yan, Fei

AU - Sabba, Dharani

AU - Dewi, Herlina A.

AU - Mathews, Nripan

AU - Boix, Pablo P.

AU - Demir, Hilmi Volkan

AU - Mhaisalkar, Subodh

PY - 2015/10/16

Y1 - 2015/10/16

N2 - Lead-halide perovskites have transcended photovoltaics. Perovskite light-emitting diodes (PeLEDs) emerge as a new field to leverage on these fascinating semiconductors. Here, we report the first use of completely inorganic CsPbBr3 thin films for enhanced light emission through controlled modulation of the trap density by varying the CsBr-PbBr2 precursor concentration. Although pure CsPbBr3 films can be deposited from equimolar CsBr-PbBr2 and CsBr-rich solutions, strikingly narrow emission line (17 nm), accompanied by elongated radiative lifetimes (3.9 ns) and increased photoluminescence quantum yield (16%), was achieved with the latter. This is translated into the enhanced performance of the resulting PeLED devices, with lower turn-on voltage (3 V), narrow electroluminescence spectra (18 nm) and higher electroluminescence intensity (407 Cd/m2) achieved from the CsBr-rich solutions.

AB - Lead-halide perovskites have transcended photovoltaics. Perovskite light-emitting diodes (PeLEDs) emerge as a new field to leverage on these fascinating semiconductors. Here, we report the first use of completely inorganic CsPbBr3 thin films for enhanced light emission through controlled modulation of the trap density by varying the CsBr-PbBr2 precursor concentration. Although pure CsPbBr3 films can be deposited from equimolar CsBr-PbBr2 and CsBr-rich solutions, strikingly narrow emission line (17 nm), accompanied by elongated radiative lifetimes (3.9 ns) and increased photoluminescence quantum yield (16%), was achieved with the latter. This is translated into the enhanced performance of the resulting PeLED devices, with lower turn-on voltage (3 V), narrow electroluminescence spectra (18 nm) and higher electroluminescence intensity (407 Cd/m2) achieved from the CsBr-rich solutions.

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Inorganic Halide Perovskites for Efficient Light-Emitting Diodes

Abstract

Bibliographical note

ASJC Scopus Subject Areas

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