Abnormal humidity-dependent electrical properties of amorphous carbon/silicon heterojunctions

作者：Gao, Xili; Zhang, Xiaozhong; Wan, Caihua; Zhang, Xin; Wu, Lihua; Tan, Xinyu

来源：Applied Physics Letters, 2010, 97(21): 212101.

DOI：10.1063/1.3520493

• ROOM-TEMPERATURE
• CARBON FILM

Amorphous carbon (a-C) film/n-Si heterojunctions have been fabricated by pulse laser deposition, and their current-voltage characteristics have been investigated. The results show that the atmosphere relative humidity (RH) has a significant effect on the reverse bias I-V characteristics of the heterojunctions. For the low bias voltages, the resistance of the a-C/Si heterojunction decreases with the increase of the RH. However, when the applied voltage is greater than a threshold, the resistance of the a-C/Si heterojunctions increases with the increase of the RH. This humidity-dependent phenomenon is attributed to the charge transfer from the absorbed H2O molecular to a-C film.

• 出版日期2010-11-22
• 单位清华大学