All-solution-processed blue small molecular organic light-emitting diodes with multilayer device structure
نویسندگان
چکیده
1566-1199/$ see front matter 2009 Elsevier B.V doi:10.1016/j.orgel.2009.06.020 * Corresponding author. Tel.: +886 35731955. E-mail address: [email protected] (H.-F. M All-solution-processed multilayer blue small molecular organic light-emitting diodes are fabricated by blade coating method. Fluorescent blue host,1-(7-(9,90-bianthracen-10-yl)9,9-dioctyl-9H-fluoren-2-yl)pyrene, and blue dopant, 4,40-(1E,10E)-2,20-(naphthalene2,6-diyl)bis(ethene-2,1-diyl)bis(N,N-bis(4-hexylphenyl)aniline), are used to achieve good solubility and pinhole-free thin film by solution process. The multilayer device structure with hole/electron transport layer is achieved by blade coating method without the dissolution problem between layers. The efficiency of the all-solution-processed device is 4.8 cd/ A at 1200 cd/m, close to that by thermal deposition in high vacuum chamber. The device performance is optimized with the annealing temperature of TPBi layer at 50 C. 2009 Elsevier B.V. All rights reserved.
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