Controlling the Interface-Areas of. Heterojunction Nanowires for High Performance Diodes

Transcription

1 Supporting Information Controlling the Interface-Areas of Organic/Inorganic Semiconductors Heterojunction Nanowires for High Performance Diodes Zheng Xue,, Hui Yang, Juan Gao, Jiaofu Li, Yanhuan Chen, Zhiyu Jia, Yongjun Li, Huibiao Liu, *, Wensheng Yang, *, Yuliang Li, and Dan Li State Key Laboratory for Supramolecular Structures and Materials, College of Chemistry, Jilin University, Changchun , People s Republic of China Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing , People s Republic of China Department of Chemistry, Shantou University, Shantou , Guangdong, People s Republic of China * liuhb@iccas.ac.cn * wsyang@jlu.edu.cn S-1

2 Materials: Copper(II) chloride (CuCl2), sublimed sulfur (S), dimethyl sulfoxide (DMSO), tetrahydrofuran (THF), N,N-dimethylformamide (DMF), sodium hydroxide (NaOH), hydrochloric acid (HCl), ethanol, acetone, chloroform and n-hexane were purchased from Beijing Chemical reagent Corporation, China. Copper foils were purchased from Sinopharm Chemical Reagent Beijing Co., Ltd. N,N,N,N -tetramethylethylenediamine (TMEDA) was purchased from J&K Scientific Ltd. Tetrahydrofuran was pretreated under reflux with calcium hydride to remove the extra water. Copper foils were pretreated by sonicating in 1 M HCl, acetone and ethanol, sequentially for 15 min, and used immediately for growing GD nanowires after dried under a flow of argon. The other reagents were used as received. The anodic aluminium oxide (AAO) templates with a porous diameter of 200 nm, a thickness of 60 μm, and a diameter of 13 mm were purchased from Whatman Co. The AAO templates were sonicated with H2O, ethanol, acetone, chloroform, n-hexane in sequence. The nanowires were synthesized using a homemade electrolytic cell. Synthesis of CuS Nanowires CuS nanowires are synthesized using the same method of CuS nanoshells but there is no GD nanowires in the AAO templates existed M CuCl2 and 0.17 M S dispersed in 10 ml DMSO were heated to 130 C and then transferred to the homemade electrolytic cell. The CuS nanowires were then grown around from the bottom of the AAO template to the up of it at a current density of 4 ma/cm 2 with the copper foil as a working electrode and a platinum wire as the counter electrode. S-2

3 Figure S1. Schematic diagram of energy level diagram of the GD/CuS core-shell heterojunction semiconductor nanowire device: (a) before contact, (b) under thermal equilibrium, (c) under forward bias. 1-3 Figure S2. The TEM images of the GD/CuS core-shell nanowires by different reaction time: (a) 5 min, (b) 10 min, (c) 20 min, (d) 30 min, (e) 40 min. S-3

4 Figure S3. The XRD pattern of the GD/CuS nanowire arrays. Figure S4. The 3D height profile of the GD/CuS core-shell nanowire. S-4

5 Figure S5. (a) The SEM image of the single GD nanowire device. (b) Current voltage (I V) characteristics of the single GD nanowire. (c) The SEM image of the single CuS nanowire device. (d) Current voltage (I V) characteristics of the single CuS nanowire. References (1) Qi, H. T.; Yu, P.; Wang, Y. X.; Han, G. C.; Liu, H. B.; Yi, Y. P.; Li, Y. L.; Mao, L. Q. Graphdiyne Oxides as Excellent Substrate for Electroless Deposition of Pd Clusters with High Catalytic Activity. J. Am. Chem. Soc. 2015, 137 (16), (2) Lei, H. W.; Fang, G. J.; Cheng, F.; Ke, W. J.; Qin, P. L.; Song, Z. C.; Zheng, Q.; Fan, X.; Huang, H. H.; Zhao, X. Z. Enhanced Efficiency in Organic Solar Cells via In Situ Fabricated p-type Copper Sulfide as the Hole Transporting Layer. Sol. Energy Mater. Sol. Cells 2014, 128, (3) Ye, L.; Li, H.; Chen, Z. F.; Xu, J. B. Near-Infrared Photodetector Based on MoS2/Black Phosphorus Heterojunction. ACS Photonics 2016, 3 (4), S-5