期刊
NANO RESEARCH
卷 11, 期 5, 页码 2771-2782出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1907-6
关键词
organic solar cells; scanning transmission X-ray microscopy; molecular orientation; inorganic/organic interface
类别
资金
- LABEX MiChem
As dipyranylidenes are excellent hole carriers, applications in organic solar cells or organic light emitting diode are envisaged. In the present study, we investigate the morphology of 2,2',6,6'-tetraphenyl-4,4'-dipyranylidene (DIPO-Ph-4) deposited under vacuum on a silicon nitride (Si3N4) substrate, a paradigmatic system for the study of molecular crystal/inorganic substrate interfaces. Samples with various coating ratios and different thermal treatments were prepared. The films were characterized by atomic force microscopy and scanning transmission X-ray microscopy to gain insight into material growth. The results show a change in orientation at a molecular level depending upon the evaporation conditions. We are now able to tailor an organic layer with a specific molecular orientation and a specific electronic behavior.
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