排序方式: 共有10条查询结果,搜索用时 500 毫秒
1
1.
Na-substituted dilithium orthosilicate Li2CoSiO4 was investigated by performing density functional theory calculations within the GGA+U framework. The effects of Na-substitution on the electronic structures and structural properties of Li2CoSiO4 were presented. The results show that the Na-substitution on Li sites in Li2CoSiO4 induces a lowering of the conduction bands and a narrowing of the band gap, which could be helpful for enhancing the electronic conductivity. On the other hand, the Na-substitution on the Li ions in Li2CoSiO4 leads to the expansion of interlayer space of the adjacent corrugated layers. This lattice expansion effect would benefit the Li ion diffusion. 相似文献
2.
GAT实现高频率与高基区穿通电压兼容特性分析 总被引:1,自引:1,他引:0
通过作者最近建立的关于 GAT器件集电结耗尽层电位分布和电场分布的二维解析模型 ,定量研究了 GAT的基区穿通电压 VPI,并且解释了该器件实现高频率与高电压兼容的实验结果。 相似文献
3.
The electronic band structures and band gap bowing parameters of InxGa1-xN are studied by the firstprinciples method based on the density functional theory. Calculations by employing both the Heyd-ScuseriaErnzerh of hybrid functional(HSE06) and the Perdew-Burke-Ernzerhof(PBE) one are performed. We found that the theoretical band gap bowing parameter is dependent significantly on the calculation method, especially on the exchange-correlation functional employed in the DFT calculations. The band gap of InxGa1-xN alloy decreases considerably when the In constituent x increases. It is the interactions of s–s and p–p orbitals between anions and cations that play significant roles in formatting the band gaps bowing. In general, the HSE06 hybrid functional could provide a good alternative to the PBE functional in calculating the band gap bowing parameters. 相似文献
4.
5.
6.
GAT栅屏蔽效应二维解析模型 总被引:3,自引:3,他引:0
建立了 GAT器件集电结耗尽层电位分布和电场分布的二维解析模型 ,定量研究了GAT的栅屏蔽效应的解析表达式 ,并借助计算机对栅屏蔽效应给以证实。该模型可供优化设计双极型高频、高压、低饱和压降功率器件参考。 相似文献
7.
8.
GAT实现高电流增益与高雪崩击穿电压兼容特性分析 总被引:1,自引:1,他引:0
通过作者最近建立的关于电力半导体器件 GAT的集电结耗尽层电位分析和电场分布的二维解析模型定量研究了 GAT的雪崩击穿特性 ,并且定量解释了该器件实现高击穿电压与高电流增益兼容的实验结果。 相似文献
9.
10.
1