Effects of Annealing on the Mechanical Properties of Pentacene and Tris(8-hydroxyquinoline) Aluminum Films

Annealing is reported as an effective process to improve electrical properties of organic semiconducting films. The mechanical properties of pentacene and tris(8-hydroxyquinoline) aluminum (Alq 3 ) films annealed at 140°C were investigated in this study by nanoindentation testing. AFM observations o...

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Bibliographic Details
Published inMolecular Crystals and Liquid Crystals Vol. 599; no. 1; pp. 30 - 35
Main Authors Kanari, Moriyasu, Kunimoto, Makoto, Ihara, Ikuo, Wakamatsu, Takashi
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 13.08.2014
Taylor & Francis Ltd
Subjects
Aluminum
Annealing
Crystals
Diffusion
Effects
Electric properties
Electrical properties
Grain growth
Hardness
Mechanical properties
mechanical property
morphology
nanoindentation
organic semiconducting film
Pentacene
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Summary:Annealing is reported as an effective process to improve electrical properties of organic semiconducting films. The mechanical properties of pentacene and tris(8-hydroxyquinoline) aluminum (Alq 3 ) films annealed at 140°C were investigated in this study by nanoindentation testing. AFM observations of as-coated and annealed pentacene films indicate grain growth from 160 to 258 nm. The annealing process decreases pentacene and Alq 3 film hardness by 23 and 36% from those of the as-coated films, 0.643 and 0.523 GPa. Grain growth and decreasing hardness are attributed to thermal diffusion and recrystallization of molecules.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2014.935916