NDLI: Molecular and thin film properties of cobalt half-sandwich compounds for optoelectronic application

Content Provider	Royal Society of Chemistry (RSC)
Author	Robertson, Neil Reinhardt, Maxwell Shuku, Yoshiaki Crain, Jason Dalgleish, Simon Reissig, Louisa Matsushita, Michio M. Awaga, Kunio
Copyright Year	2017
Abstract	The structure and electronic properties of a novel cobalt half sandwich complex of cyclopentadiene (Cp) and diaminonaphthalene (DAnap) [CpCo(DAnap)] are described and compared to the previously reported diaminobenzene derivative [CpCo(DAbnz)] in view of their potential for (opto)electronic device application. Both complexes show stable redox processes, tunable through the diaminoacene ligand, and show strong absorption in the visible region, with additional transitions stretching into the near infrared (NIR). CpCo(DAnap) crystallises with a particularly large unit cell (9301 Å3), comprising 32 molecules, with a gradual rotation over 8 molecules along the long c-axis. In the solid state the balance of the optical transitions in both complexes is reversed, with a suppression of the visible band and an enhancement of the NIR band, attributed to extensive intermolecular electronic interaction. In the case of CpCo(DAnap), highly crystalline thin films could be formed under physical vapor deposition, which show a photocurrent response stretching into the NIR, and p-type semiconductor behavior in field effect transistors with mobility values of the order 1 × 10−4 cm2 V−1 s−1. The device performance is understood through investigation of the morphology of the grown films.
Starting Page	6768
Ending Page	6776
Page Count	9
File Format	HTM / HTML PDF
ISSN	14639076
Volume Number	19
Issue Number	9
Journal	Physical Chemistry Chemical Physics
DOI	10.1039/c6cp08685c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Infrared spectroscopy Extrinsic semiconductor Sandwich compound Photocurrent Cyclopentadiene Ligand NIR Redox Physical vapor deposition Cobalt Crystal structure
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry

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