Epitaxial Ultrathin Organic Crystals on Graphene for High-Efficiency Phototransistors

Xiaolong Liu; Xiaoguang Luo; Haiyan Nan; Hui Guo; Peng Wang; Linglong Zhang; Minmin Zhou; Ziyi Yang; Yi Shi; Weida Hu; Zhenhua Ni; Teng Qiu; Zongfu Yu; Jian-Bin Xu; Xinran Wang

doi:10.1002/adma.201600400

Epitaxial Ultrathin Organic Crystals on Graphene for High-Efficiency Phototransistors

Adv Mater. 2016 Jul;28(26):5200-5. doi: 10.1002/adma.201600400. Epub 2016 May 4.

Authors

Xiaolong Liu¹, Xiaoguang Luo^{2

3}, Haiyan Nan², Hui Guo⁴, Peng Wang⁵, Linglong Zhang¹, Minmin Zhou¹, Ziyi Yang¹, Yi Shi¹, Weida Hu⁵, Zhenhua Ni², Teng Qiu², Zongfu Yu³, Jian-Bin Xu⁶, Xinran Wang¹

Affiliations

¹ National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
² Department of Physics, Southeast University, Nanjing, 211189, China.
³ Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA.
⁴ School of Microelectronics, Xidian University, Xian, 710071, China.
⁵ National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu Tian Road, Shanghai, 200083, China.
⁶ Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, Hong Kong SAR, China.

PMID: 27146896
DOI: 10.1002/adma.201600400

Abstract

Epitaxially grown ultrathin organic semiconductors on graphene show great promise as highly efficient phototransistors. The devices exhibit a strong photoresponse down to the limit of a monolayer organic crystal, with a photoresponsivity higher than 10(4) A W(-1) and a photoconductive gain over 10(8) . The excellent performance is attributed to the high quality of the organic crystal and interface, a unique feature of van der Waals epitaxy.

Keywords: 2D; graphene; organic semiconductors; phototransistors; ultrathin.