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Temperature-induced exciton switching in long alkyl chain based inorganic-organic hybrids

Temperature-induced exciton switching in long alkyl chain based inorganic-organic hybrids
Temperature-induced exciton switching in long alkyl chain based inorganic-organic hybrids
Photoluminescence and transmission is systematically explored in thin films of long-alkyl-chain-based inorganic-organic (IO) hybrids (CnH2n+1NH3)2PbI4 (n=12, 16, 18) (CnPI) and NH3C12H22NH3PbI4 (DDPI). Such IO-hybrids, which form natural multiple quantum well structures stacked up along c-axis, possess strong room-temperature exciton transitions. These hybrids exhibit reversible phase transition of two different crystal phase transitions at easily accessible device temperatures. Flipping the structural phase is clearly reflected in switching of the excitons with corresponding photoluminescence and transmission changes showing clear thermal hysteresis. The phase-dependent switching of excitons is predominantly due to reversible crumpling of the inorganic PbI sheet networks. Systematic temperature dependent studies establish a correlation between the structure and optical exciton features. Such thermo-optic exciton switching suggests possible new photonic devices.
0021-8979
1-6
Pradeesh, K.
d264c1f5-cbaf-42ac-a939-10fce00fa5cb
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Vijaya Prakash, G.
658d7c66-7665-4fb8-a34e-04de8362a998
Pradeesh, K.
d264c1f5-cbaf-42ac-a939-10fce00fa5cb
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Vijaya Prakash, G.
658d7c66-7665-4fb8-a34e-04de8362a998

Pradeesh, K., Baumberg, J.J. and Vijaya Prakash, G. (2012) Temperature-induced exciton switching in long alkyl chain based inorganic-organic hybrids. Journal of Applied Physics, 111 (1), 1-6, [013511]. (doi:10.1063/1.3674324).

Record type: Article

Abstract

Photoluminescence and transmission is systematically explored in thin films of long-alkyl-chain-based inorganic-organic (IO) hybrids (CnH2n+1NH3)2PbI4 (n=12, 16, 18) (CnPI) and NH3C12H22NH3PbI4 (DDPI). Such IO-hybrids, which form natural multiple quantum well structures stacked up along c-axis, possess strong room-temperature exciton transitions. These hybrids exhibit reversible phase transition of two different crystal phase transitions at easily accessible device temperatures. Flipping the structural phase is clearly reflected in switching of the excitons with corresponding photoluminescence and transmission changes showing clear thermal hysteresis. The phase-dependent switching of excitons is predominantly due to reversible crumpling of the inorganic PbI sheet networks. Systematic temperature dependent studies establish a correlation between the structure and optical exciton features. Such thermo-optic exciton switching suggests possible new photonic devices.

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Published date: 2012
Organisations: Optoelectronics Research Centre

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Local EPrints ID: 357238
URI: http://eprints.soton.ac.uk/id/eprint/357238
ISSN: 0021-8979
PURE UUID: 0fdae594-4fe2-4fbe-a2a0-f41f7941753f

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Date deposited: 04 Oct 2013 13:54
Last modified: 14 Mar 2024 14:56

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Contributors

Author: K. Pradeesh
Author: J.J. Baumberg
Author: G. Vijaya Prakash

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