Broadband-Emitting 2 D Hybrid Organic–Inorganic Perovskite Based on Cyclohexane-bis(methylamonium) Cation

Ishita Neogi; Annalisa Bruno; Damodaran Bahulayan; Teck Wee Goh; Biplab Ghosh; Rakesh Ganguly; Daniele Cortecchia; Tze Chien Sum; Cesare Soci; Nripan Mathews; Subodh Gautam Mhaisalkar

doi:10.1002/cssc.201701227

Broadband-Emitting 2 D Hybrid Organic–Inorganic Perovskite Based on Cyclohexane-bis(methylamonium) Cation

Ishita Neogi, Annalisa Bruno^*, Damodaran Bahulayan, Teck Wee Goh, Biplab Ghosh, Rakesh Ganguly, Daniele Cortecchia, Tze Chien Sum, Cesare Soci, Nripan Mathews, Subodh Gautam Mhaisalkar

^*Corresponding author for this work

Nanyang Technological University

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

80 Citations (Scopus)

Abstract

A new broadband-emitting 2 D hybrid organic–inorganic perovskite (CyBMA)PbBr₄ based on highly flexible cis-1,3-bis(methylaminohydrobromide)cyclohexane (CyBMABr) core has been designed, synthesized, and investigated, highlighting the effects of stereoisomerism of the templating cation on the formation and properties of the resulting perovskite. The new 2 D material has high exciton binding energy of 340 meV and a broad emission spanning from 380 to 750 nm, incorporating a prominent excitonic band and a less intense broad peak at room temperature. Significant changes in the photoluminescence (PL) spectrum were observed at lower temperatures, showing remarkable enhancement in the intensity of the broadband at the cost of excitonic emission. Temperature-dependent PL mapping indicates the effective role of only a narrow band of excitonic absorption in the generation of the active channel for emission. Based on the evidences obtained from the photophysical investigations, we attributed the evolution of the broad B-band of (CyBMA)PbBr₄ to excitonic self-trapped states.

Original language	English
Pages (from-to)	3765-3772
Number of pages	8
Journal	ChemSusChem
Volume	10
Issue number	19
DOIs	https://doi.org/10.1002/cssc.201701227
Publication status	Published - Oct 9 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

ASJC Scopus Subject Areas

Environmental Chemistry
General Chemical Engineering
General Materials Science
General Energy

Keywords

hybrid perovskites
photoluminescence
self-trapped excitons
solar cells
white-light emission

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10.1002/cssc.201701227

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title = "Broadband-Emitting 2 D Hybrid Organic–Inorganic Perovskite Based on Cyclohexane-bis(methylamonium) Cation",

abstract = "A new broadband-emitting 2 D hybrid organic–inorganic perovskite (CyBMA)PbBr4 based on highly flexible cis-1,3-bis(methylaminohydrobromide)cyclohexane (CyBMABr) core has been designed, synthesized, and investigated, highlighting the effects of stereoisomerism of the templating cation on the formation and properties of the resulting perovskite. The new 2 D material has high exciton binding energy of 340 meV and a broad emission spanning from 380 to 750 nm, incorporating a prominent excitonic band and a less intense broad peak at room temperature. Significant changes in the photoluminescence (PL) spectrum were observed at lower temperatures, showing remarkable enhancement in the intensity of the broadband at the cost of excitonic emission. Temperature-dependent PL mapping indicates the effective role of only a narrow band of excitonic absorption in the generation of the active channel for emission. Based on the evidences obtained from the photophysical investigations, we attributed the evolution of the broad B-band of (CyBMA)PbBr4 to excitonic self-trapped states.",

keywords = "hybrid perovskites, photoluminescence, self-trapped excitons, solar cells, white-light emission",

author = "Ishita Neogi and Annalisa Bruno and Damodaran Bahulayan and Goh, {Teck Wee} and Biplab Ghosh and Rakesh Ganguly and Daniele Cortecchia and Sum, {Tze Chien} and Cesare Soci and Nripan Mathews and Mhaisalkar, {Subodh Gautam}",

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doi = "10.1002/cssc.201701227",

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T1 - Broadband-Emitting 2 D Hybrid Organic–Inorganic Perovskite Based on Cyclohexane-bis(methylamonium) Cation

AU - Neogi, Ishita

AU - Bruno, Annalisa

AU - Bahulayan, Damodaran

AU - Goh, Teck Wee

AU - Ghosh, Biplab

AU - Ganguly, Rakesh

AU - Cortecchia, Daniele

AU - Sum, Tze Chien

AU - Soci, Cesare

AU - Mathews, Nripan

AU - Mhaisalkar, Subodh Gautam

PY - 2017/10/9

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AB - A new broadband-emitting 2 D hybrid organic–inorganic perovskite (CyBMA)PbBr4 based on highly flexible cis-1,3-bis(methylaminohydrobromide)cyclohexane (CyBMABr) core has been designed, synthesized, and investigated, highlighting the effects of stereoisomerism of the templating cation on the formation and properties of the resulting perovskite. The new 2 D material has high exciton binding energy of 340 meV and a broad emission spanning from 380 to 750 nm, incorporating a prominent excitonic band and a less intense broad peak at room temperature. Significant changes in the photoluminescence (PL) spectrum were observed at lower temperatures, showing remarkable enhancement in the intensity of the broadband at the cost of excitonic emission. Temperature-dependent PL mapping indicates the effective role of only a narrow band of excitonic absorption in the generation of the active channel for emission. Based on the evidences obtained from the photophysical investigations, we attributed the evolution of the broad B-band of (CyBMA)PbBr4 to excitonic self-trapped states.

KW - hybrid perovskites

KW - photoluminescence

KW - self-trapped excitons

KW - solar cells

KW - white-light emission

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Broadband-Emitting 2 D Hybrid Organic–Inorganic Perovskite Based on Cyclohexane-bis(methylamonium) Cation

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

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