Low temperature excitonic spectroscopy study of mechano-synthesized hybrid perovskite

Priyabrata Sadhukhan; Anway Pradhan; Suman Mukherjee; Payal Sengupta; Atanu Roy; Satyaban Bhunia; Sachindranath Das

doi:10.1063/1.5084145

Low temperature excitonic spectroscopy study of mechano-synthesized hybrid perovskite

Priyabrata Sadhukhan, Anway Pradhan, Suman Mukherjee, Payal Sengupta, Atanu Roy, Satyaban Bhunia, Sachindranath Das

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

13 Scopus citations

Abstract

Photo-physical properties of mechano-chemically synthesized organic-inorganic hybrid perovskites have been investigated. CH₃NH₃PbBr₃ nano-particles were prepared using the wet ball milling technique. Three emission peaks have been observed using low temperature photoluminescence spectroscopy. We assign these peaks to originate from free excitonic (FE) and bound excitonic emission and impurity level transition. FE peak energy increases linearly with temperature and a lattice phase change (orthorhombic to cubic) induces a sudden lateral shift after 110 K. However, the simultaneous presence of two phases has not been observed in this case. Greater activation energy is found in the mechano-chemically synthesized material rather than reported solution processed samples which indicates higher excitonic stability.

Original language	English
Article number	131102
Journal	Applied Physics Letters
Volume	114
Issue number	13
DOIs	https://doi.org/10.1063/1.5084145
State	Published - 1 Apr 2019
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Low temperature excitonic spectroscopy study of mechano-synthesized hybrid perovskite",

abstract = "Photo-physical properties of mechano-chemically synthesized organic-inorganic hybrid perovskites have been investigated. CH3NH3PbBr3 nano-particles were prepared using the wet ball milling technique. Three emission peaks have been observed using low temperature photoluminescence spectroscopy. We assign these peaks to originate from free excitonic (FE) and bound excitonic emission and impurity level transition. FE peak energy increases linearly with temperature and a lattice phase change (orthorhombic to cubic) induces a sudden lateral shift after 110 K. However, the simultaneous presence of two phases has not been observed in this case. Greater activation energy is found in the mechano-chemically synthesized material rather than reported solution processed samples which indicates higher excitonic stability.",

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AU - Sadhukhan, Priyabrata

AU - Pradhan, Anway

AU - Mukherjee, Suman

AU - Sengupta, Payal

AU - Roy, Atanu

AU - Bhunia, Satyaban

AU - Das, Sachindranath

PY - 2019/4/1

Y1 - 2019/4/1

N2 - Photo-physical properties of mechano-chemically synthesized organic-inorganic hybrid perovskites have been investigated. CH3NH3PbBr3 nano-particles were prepared using the wet ball milling technique. Three emission peaks have been observed using low temperature photoluminescence spectroscopy. We assign these peaks to originate from free excitonic (FE) and bound excitonic emission and impurity level transition. FE peak energy increases linearly with temperature and a lattice phase change (orthorhombic to cubic) induces a sudden lateral shift after 110 K. However, the simultaneous presence of two phases has not been observed in this case. Greater activation energy is found in the mechano-chemically synthesized material rather than reported solution processed samples which indicates higher excitonic stability.

AB - Photo-physical properties of mechano-chemically synthesized organic-inorganic hybrid perovskites have been investigated. CH3NH3PbBr3 nano-particles were prepared using the wet ball milling technique. Three emission peaks have been observed using low temperature photoluminescence spectroscopy. We assign these peaks to originate from free excitonic (FE) and bound excitonic emission and impurity level transition. FE peak energy increases linearly with temperature and a lattice phase change (orthorhombic to cubic) induces a sudden lateral shift after 110 K. However, the simultaneous presence of two phases has not been observed in this case. Greater activation energy is found in the mechano-chemically synthesized material rather than reported solution processed samples which indicates higher excitonic stability.

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JO - Applied Physics Letters

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Low temperature excitonic spectroscopy study of mechano-synthesized hybrid perovskite

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