Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8044956 | Vacuum | 2015 | 4 Pages |
Abstract
We employed oxygen plasma treatment to improve the electrical properties in Cu/n-type Ge Schottky junctions and investigated temperature dependent current transport mechanism in the temperature range of 100-300Â K. The Schottky barrier height increased commensurate with increasing temperature, which was attributed to barrier inhomogeneity. The inhomogeneity of the barrier was represented by a double Gaussian distribution, each one prevailing in a distinct temperature range: a high-temperature range from 220 to 300Â K and a low-temperature range from 100 to 180Â K. Modified Richardson plots revealed a Richardson constant of 160.0Â Acmâ2Â Kâ2 for the high-temperature region (220-300Â K), which is comparable to the theoretical value of 140.0Â Acmâ2Â Kâ2 for n-type Ge. Reverse current analysis revealed that Poole-Frenkel and Schottky emissions were dominant in the lower and higher voltage regions, respectively.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Hogyoung Kim, Se Hyun Kim, Chan Yeong Jung, Yunae Cho, Dong-Wook Kim,