Química Nova (Jan 2014)

Influência de diferentes solventes utilizados na deposição de filme de poli(9-vinilcarbazol) em dispositivos OLEDs

  • Emerson Roberto Santos,
  • Shu Hui Wang,
  • Fabio Conte Correia,
  • Ivan Rodrigues Costa,
  • Victor Sonnenberg,
  • Elvo Calixto Burini Junior,
  • Roberto Koji Onmori

DOI
https://doi.org/10.1590/S0100-40422014000100001
Journal volume & issue
Vol. 37, no. 1
pp. 1 – 5

Abstract

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This work studies the influence of the film deposition process on light emission performance and on threshold voltage of OLEDs, with architecture glass/ITO/PEDOT:PSS/PVK/Alq3/Al. The commercial PVK was dissolved in different solvents such as: chloroform, tetrahydrofuran, 1,2,4-trichlorobenzene and trimethylpentane. OLEDs were characterized by current-voltage and revealed a significant influence of the solvents, although all devices emitted green electroluminescence. A difference in threshold voltage up to 10 V was observed among OLEDs prepared from different solvents. The 1,2,4-trichlorobenzene showed best performance, presenting lowest treshold voltage (≈ 6 V), followed by tetrahydrofuran (≈ 8 V), trimethylpentane (≈ 14 V) and chloroform (≈ 16 V).

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