Stable n-type doping of graphene via high-molecular-weight ethylene amines

作者：Jo Insu; Kim Youngsoo; Moon Joonhee; Park Subeom; Moon Jin San; Park Won Bae; Lee Jeong Soo^*; Hong Byung Hee

来源：Physical Chemistry Chemical Physics, 2015, 17(44): 29492-29495.

DOI：10.1039/c5cp03196f

We demonstrate a stable and strong n-type doping method to tune the electrical properties of graphene via vapor phase chemical doping with various high-molecular-weight ethylene amines. The resulting carrier concentration after doping with pentaethylenehexamine (PEHA) is as high as -1.01 x 10(13) cm(-2), which reduces the sheet resistance of graphene by up to similar to 400% compared to pristine graphene. Our study suggests that the branched structure of the dopant molecules is another important factor that determines the actual doping degree of graphene.

• 出版日期2015