A theoretical study on the transport property of the p-n heterojunction Jie Qiu, Kui-juan Jin, Peng Han, Hui-bin Lu, Chun-lian Hu, Bao-ping Wang and Guo-zhen Yang EPL, 79 5 (2007) 57004 Published online: 30 July 2007 DOI: 10.1209/0295-5075/79/57004