Organic Semiconductor Based Heterostructures for Optoelectronic Devices

Stănculescu, Anca; Stanculescu, Florin

doi:10.5772/15603

Cited by 1 publication

(2 citation statements)

References 64 publications

(79 reference statements)

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“…The samples for irradiation are bulk, mechanically polished slices of pure, crystalline benzil obtained from ingots with diameter ϕ = 10 mm, grown from melt by the Bridgman‐Stockbarger (B‐S) method . The melt growth could be used because benzil is characterized by good thermal stability at the melting point . The experimental set‐up (figure a) was realized by modifying the B‐S vertical configuration for assuring steep gradients at the melt‐crystal interface (12 °C/cm) and low moving speed of the growth interface (0.7 mm/h).…”

Section: Methodsmentioning

confidence: 99%

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Effect of heavy ions irradiation on the properties of benzil crystals

Stanculescu

Socol

Matei

et al. 2017

Crystal Research and Technology

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Thick slices mechanically polished cut from a pure benzil ingot grown from melt in a modified Bridgman-Stockbarger configuration were irradiated with Ni ions having a specific energy of 11.4 MeV/u at different fluences. The effect of radiation on the properties of bulk benzil has been investigated. The chemical structure was not substantially affected as shown by infrared spectrum. The changes induced on the disorder degree have been evaluated from the Urbach law and X Ray Diffraction measurements. The morphology and surface topography have been analyzed emphasising a decrease in the size of granules and an increase in the surface roughness by irradiation. No effect of irradiation on the photoluminescence emission and optical nonlinear properties has been evidenced. These results recommend benzil as candidate for applications in space technology.

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Section: Methodsmentioning

confidence: 99%

“…In the last decades, the organic molecular crystals have been considered as potential substitutes for inorganic crystals in nonlinear optical applications because of high nonlinear coefficients, large birefringence, high damage thresholds in laser beam and large transparency domain …”

Section: Introductionmentioning

confidence: 99%