Publication details
Delayed phase separation in growth of organic semiconductor blends with limited intermixing
| Authors | |
|---|---|
| Year of publication | 2017 |
| Type | Article in Periodical |
| Magazine / Source | Physica Status Solidi Rapid Research Letters |
| MU Faculty or unit | |
| Citation | |
| Web | Full Text |
| Doi | http://dx.doi.org/10.1002/pssr.201600428 |
| Field | Solid matter physics and magnetism |
| Keywords | organic semiconductors; picene; pentacene; phase separation; thin films; X-ray diffraction; blends |
| Description | Binary mixed thin films of picene (C22H14, PIC) and pentacene (C22H14, PEN) consist of crystallites with a statistical occupation of the lattice sites by either PEN or PIC and unit cell parameters continuously changing with the mixing ratio. For high PIC ratios a PIC phase forms which corresponds to a limited intermixing of the two compounds. The growth behavior of these mixtures is investigated in situ and in realtime using grazing incidence X-ray diffraction. We observe a delayed phase separation in PIC-rich blends, i.e. complete intermixing in the monolayer range and the nucleation of a pure PIC-phase in addition to the intermixed phase starting from the second monolayer. |
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