Pulsed laser ablation of zinc selenide in nitrogen ambience: Formation of zinc nitride films

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• 作者：S. Simi^a ; I. Navas^a ; ^b ; R. Vinodkumar^a ; S.R. Chalana^a ; Mohan Gangrade^c ; V. Ganesan^c ; V.P. Mahadevan Pillai^a ; ^{vpmpillai9@gmail.com"" rel=""nofollow}
• 关键词：Pulsed laser deposition ; Formation of zinc nitride ; Discontinuous thin films ; Cubic bixbyite structure ; Lattice strain ; Band gap energy and porosity
• 刊名：Applied Surface Science
• 出版年：2011
• 出版时间：1 September 2011
• 年：2011
• 卷：257
• 期：22
• 页码：9269-9276
• 全文大小：1072 K

文摘

Zinc nitride (Zn₃N₂) thin films are prepared using pulsed laser deposition (PLD) from zinc selenide (ZnSe) target at different nitrogen ambient pressures viz. 1, 3, 5, 7 and 10 Pa. The films prepared with nitrogen pressures 1 and 3 Pa are amorphous in nature, whereas the films prepared at 5, 7 and 10 Pa exhibit the presence of cubic bixbyite Zn₃N₂ structure with lattice parameter very close to bulk of Zn₃N₂. The particle size calculated by Debye Scherrer's formula is in the nano regime. Surface morphology of the films is studied by SEM and AFM analysis. Optical parameters such as band gap, refractive index and porosity of the films are calculated. Moreover, the present study confers an outlook about how do various factors such as substrate temperature, reactive supplementing gas and laser-target interaction influence the film developing process during pulsed lased deposition.