Picene, an isomer of pentacene with an armchair arrangement of benzene rings, can be regarded as a fragment of a graphene sheet. Picene is more chemically-stable than pentacene because of its larger energy band gap (3.3 eV) and larger ionisation potential (5.5 eV).
p-Channel FET characteristics of the picene thin-film FET can be significantly enhanced by exposure to O2, with the field-effect mobility (μ) reaching 1.4 – 3.2 cm2V–1 s–1. It is believed that the highest two picene orbitals are inverted due to the strong interactions between the singly-occupied oxygen π orbital and the highest occupied orbital of picene [2, 3]. The μ value of the picene thin-film FET can be further improved to 5 cm2V–1 s–1 under 500 torr of O2, the highest μ reported to date for an organic thin-film FET.
Like graphite or other 2D materials, picene can be intercalated with metal (e.g. potassium). The magnetic properties of the Kx picene solids also show superconducting transitions at 7 K and 18 K .
|Molecular weight||278.35 g/mol|
|Absorption||λmax 285 nm in DCM (lit.)|
|HOMO/LUMO||HOMO = 5.5 eV, LUMO = 2.2 eV |
|Classification / Family||Aromatic hydrocarbons, Phenacene, High-performance Field-effect transistors, Superconductivity, 2D materials.|
|Purity||Unsublimed > 99% (HPLC)|
|Melting point||366-367 °C|
Literature and Reviews
- Transistor Application of Phenacene Molecules and Their Characteristics, Y. Kubozono et al., Eur. J. Inorg. Chem., 3806–3819 (2014); DOI:10.1002/ejic.201402168.
- Air-assisted High-performance Field-effect Transistor with Thin Films of Picene, H. Okamoto et al., J. Am. Chem. Soc., 130, 10470–10471 (2008); DIO: 10.1021/ja803291a.
- Effect of Oxygen on the Electronic Structure of Highly Crystalline Picene Films, Y. Wang et al., J. Am. Chem. Soc., 133, 10054–10057 (2011); DOI: 10.1021/ja204011j.
- Superconductivity in alkali-metal-doped picene, R. Mitsuhashi et al., Nature, 464, 76-79 (2010); doi :10.1038/nature08859
Characteristics of Single Crystal Field-Effect Transistors with a New
Type of Aromatic Hydrocarbon, Picene, N. Kawai et al., J. Phys. Chem. C, 116, 7983−7988 (2012); DOI: 10.1021/jp300052p.
- Air-assisted High performance Field-effect Transistor with Thin Films of Picene, H. Okamoto et al., J. Am. Chem. Soc., 130 (2008) 10470–10471. doi:10.1021/ja803291a.
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