Authors:
Kelly C. Teixeira Divisão de Metrologia de Materiais, Inmetro, Duque de Caxias, RJ, Brazil
Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro, PUC-Rio, Rio de Janeiro, RJ, Brazil

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Gabriela F. Moreira Divisão de Metrologia de Materiais, Inmetro, Duque de Caxias, RJ, Brazil

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Welber G. Quirino Divisão de Metrologia de Materiais, Inmetro, Duque de Caxias, RJ, Brazil

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Cristiano Legnani Divisão de Metrologia de Materiais, Inmetro, Duque de Caxias, RJ, Brazil

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Raigna A. Silva Divisão de Metrologia de Materiais, Inmetro, Duque de Caxias, RJ, Brazil
Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil

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Marco Cremona Divisão de Metrologia de Materiais, Inmetro, Duque de Caxias, RJ, Brazil
Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro, PUC-Rio, Rio de Janeiro, RJ, Brazil

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Hermi F. Brito Departamento de Química Fundamental, Universidade de São Paulo, São Paulo, SP, Brazil

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Carlos A. Achete Divisão de Metrologia de Materiais, Inmetro, Duque de Caxias, RJ, Brazil

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Abstract

The improvement of operational lifetime and efficiency of organic light-emitting devices has stimulated many studies focused on the mechanisms responsible for their degradation. Such instabilities can be induced by several factors such as (i) current flow and heating, (ii) chemical reactions, (iii) self-conversion of the charge transporting molecules to cation, anion, and/or radical species. This work aims at investigating the thermal stability of rare-earth based tetrakis beta-diketonates complexes like M[Eu(dbm)4] (M = Li+, TMPip+, and Morf+) through TG technique coupled with FTIR. Preliminary results show that Li[Eu(dbm)4]·4H2O complex presents no degradation in its structure until 300 °C. However, evidences of rapid thermal degradation of the other two compounds have been found at temperatures lower than 100 °C, implying that these complexes could be degraded during the thermal deposition process at relatively high temperatures.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)