The enhancement of nanocrystallization in amorphous silicon thin films deposited on glass substrate

Lee, Jaimin; Shon, Minsoo; Lyou, Jong H.

doi:10.1016/j.cap.2006.01.011

Cited by 3 publications

(1 citation statement)

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“…This is supported by the Raman analysis for 300/400 °C samples (Fig. 3) which reveals the coexistence of both nc-Si crystal at 517 cm -1 and amorphous Si at 480 cm -1 [9]. All the above results are different from those of Si quantum dots [8] fabricated using the sputtering method.…”

Section: Resultsmentioning

confidence: 66%

Studies of the self-assembled growth mechanism on nanocrystalline silicon nanodots

Sakrani¹,

Sumpono²,

Tarjudin³

et al. 2014

Mal. J. Fund. Appl. Sci.

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Nanocrystalline silicon (nc-Si) nanodots have been grown on corning glass (7059) substrate using a self-assembly VHF-PECVD method under the following experimental conditions: Fixed deposition temperatures of 300/400 °C, deposition times 30/60 s, plasma power of 10 W, silane gas flow rate of 10 sccm, as well as deposition pressure of 10-2 torr. It is predicted that the onset of nucleation began immediately after the deposition and start to appear clearly after 20-60 s during which growth mechanisms occur. Essentially, the nanodots were formed onto the substrate in dome-like shapes by virtue of equilibrium surface energies, γLS, γLN andγNS. The associated liquid/solid nucleation mechanism was then simulated and related parameters were obtained: Free energy change per unit volume ΔGv ∼-104 Jmol-1; Surface energies per unit area, γLN = 1.44 Jm-2, γNS = 19 - 60 Jm-2 and γLS = 0.74 Jm-2; Critical energies ΔG* ∼10-15 J; Critical radii r* = 16 - 48 nm. These results were experimentally verified, in particular for selected critical radius r* less than 50 nm.Other measurements were also carried out: PL analysis gave bandgap energies ∼ 1.8-2.4 eV, whilst Raman spectra revealed the coexistence of nc-Si and amorphous Si. It is strongly suggested that, the nc-Si nanodot grown on glass substrate fulfills the Volmer-Weber growth mode with a minor modification.

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Section: Resultsmentioning

confidence: 66%