当前位置: X-MOL 学术J. Mater. Sci. Mater. Electron. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
On the electrical and charge conduction properties of thermally evaporated MoO x on n- and p-type crystalline silicon
Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2020-11-23 , DOI: 10.1007/s10854-020-04884-5
Murat Gülnahar , Hisham Nasser , Arghavan Salimi , Raşit Turan

In this work, the electrical and charge conduction characteristics of a contact structure featuring thermally evaporated MoOx, deposited on n- and p-type crystalline silicon (c-Si), are extensively investigated by room temperature current–voltage (I–V), transmission line measurements (TLM), and temperature-dependent current–voltage measurements (I–V–T). XRD diffraction spectrum shows that the deposited MoOx film exhibits amorphous nature. From TLM measurements, the values of contact resistivity are calculated to be \({\rho_{\rm {c}}}\): 55.9 mΩ-cm2 for Ag/MoOx/n-Si and \({\rho_{\rm {c}}}\): 48.7 mΩ-cm2 for Ag/MoOx/p-Si. The barrier parameters such as barrier height (\({{\phi }_{\mathrm{e}}}\)) and ideality factor (\({n}\)) are investigated by the thermionic emission theory for I–V and I–V–T measurements. The \({{\phi }_{\mathrm{e}}}\), \({n}\), and conventional Richardson plot demonstrate resolute temperature dependency, obeying the barrier height of Gaussian distribution model. The uniform barrier height values are calculated to be \({{\phi }_{\mathrm{b}}}\):1.24 eV for Ag/MoOx/n-Si and \({{\phi }_{\mathrm{b}}}\):0.66 eV for Ag/MoOx/p-Si from the extrapolation of \({{\phi }_{\mathrm{e}}}\) at \({n}\) \({=}\) 1 of the linear fitting of the variation with the experimental barrier height \({{\phi }_{\mathrm{e}}}\) with ideality factor. The activation energy (\({{E}_{\mathrm{a}}}\)) and Richardson constant (A*), obtained from Richardson plot, are much smaller than \({{\phi }_{\mathrm{b}}}\) and the theoretical values of n- and p-type c-Si. The modified Richardson plot yields more reliable Richardson constant and homogeneous barrier height values of 106.2 Acm−2 K−2 and 1.21 eV, 23.4 Acm−2 K−2 and 0.63 eV for Ag/MoOx/n-Si and Ag/MoOx/p-Si heterostructures, respectively. The results demonstrate that thermally evaporated MoOx has particular advantages due to its good rectifying characteristics such as the extra enhancement to barrier height and low contact resistivity for interfacial layer applications.



中文翻译:

关于热蒸发的MoO x在n型和p型晶体硅上的电和电荷传导性质

在这项工作中,通过室温电流-电压(IV)广泛研究了沉积在n型和p型晶体硅(c-Si)上的具有热蒸发MoO x的接触结构的电和电荷传导特性,传输线测量(TLM)和与温度相关的电流-电压测量(IV–T)。XRD衍射光谱表明,所沉积的MoO x膜表现出非晶性质。从TLM测量,接触电阻率的值被计算为\({\ RHO _ {\ RM {C}}} \):55.9毫欧-厘米2为银/的MoO X / N-Si键和\({\ rho_ { \ RM {C}}} \):48.7毫欧-厘米2为银/的MoO X/ p-Si。通过热电子发射理论研究了IV的势垒参数,例如势垒高度(\({{\ phi} _ {\ mathrm {e}}} \))和理想因子(\({n} \))和I–V–T测量。的\({{\披} _ {\ mathrm {E}}} \) \({N} \) ,和常规理查森情节表明坚决温度依赖性,服从高斯分布模型的势垒高度。对于Ag / MoO x / n-Si和\({{{\ phi} _ {\\},统一的势垒高度值计算为\({{\ phi __ {\ mathrm {b}}} \):1.24 eV mathrm {b}}} \):根据\({n} \)\({ {\ phi} _ {\ mathrm {e}}} \\)外推得出的Ag / MoO x / p-Si为0.66 eV \({=} \) 1与理想障碍因子的实验势垒高度\({{\ phi} _ {\ mathrm {e}}}} \)的线性拟合拟合。从Richardson图获得的活化能(\({{E} _ {\ mathrm {a}}} \))和Richardson常数(A *)远小于\({{\ phi} _ {{mathrm {b}}} \)和n型和p型c-Si的理论值。对于Ag / MoO x / n-Si和Ag / MoO x,修改后的Richardson图可以得到更可靠的Richardson常数和均质势垒高度值,分别为106.2 Acm -2  K -2和1.21 eV,23.4 Acm -2  K -2和0.63 eV。/ p-Si异质结构。结果表明,热蒸发的MoO x由于其良好的整流特性(例如,对界面层应用的势垒高度的额外增强和较低的接触电阻率)而具有特殊的优势。

更新日期:2020-11-23
down
wechat
bug