Efficient Defect Healing of Transition Metal Dichalcogenides by Metallophthalocyanine

被引:23
作者
Ahn, Hyeyoung [1 ]
Huang, Yu-Chiao [1 ]
Lin, Chang-Wei [1 ]
Chiu, Yi-Lun [1 ]
Lin, Erh-Chen [2 ]
Lai, Ying-Yu [2 ]
Lee, Yi-Hsien [2 ]
机构
[1] Natl Chiao Tung Univ, Dept Photon, Hsinchu 30010, Taiwan
[2] Natl Tsing Hua Univ, Inst NanoEngn & MicroSyst, Hsinchu 30010, Taiwan
关键词
two-dimensional materials; transition metal dichalcogenides; molybdenum diselenide; phthalocyanine; defects; MONOLAYER MOS2; PHOTOLUMINESCENCE; DEPENDENCE; DISORDER; MOBILITY; GAP;
D O I
10.1021/acsami.8b09378
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have attracted great attention as alternatives to graphene with semiconducting band gaps. Mono- or few-layer TMDCs can be prepared by various methods, but regardless of the fabrication methods [such as mechanical exfoliation and chemical vapor deposition (CVD)], TMDCs contain many structural defects, which significantly affect their physical properties and limit their performance in applications. Metallophthalocyanines (MPcs) are organic semiconductors, and as dopants, they are capable of modulating the optical and electrical properties of other semiconducting materials. Here, we report that besides the ability to modulate the optoelectronic properties of 2D TMDCs, MPc molecules can be used to heal defects and improve the physicochemical properties of TMDCs. Doping of planar MPc molecules to TMDCs is achieved by a simple solution dip-coating method and results in a significant improvement in the optical properties and thermal responses of CVD-grown TMDCs, even comparable to those of mechanically exfoliated counterparts. Study of carrier dynamics shows that the adsorption of MPc on the TMDC surface leads to the complete suppression of the mid-gap defect-induced absorption in TMDCs. Furthermore, MPc molecules with a large lateral size are found to effectively reduce the point defects in mechanically exfoliated TMDCs introduced during the preparation process. Our results not only clarify the optoelectronic modulation mechanism of chemical doping but also offer a simple method to control the nanosized defects in 2D TMDCs.
引用
收藏
页码:29145 / 29152
页数:8
相关论文
共 31 条
[1]   Anisotropic exciton relaxation in nanostructured metal (Zn and F16Zn)-phthalocyanine [J].
Ahn, Hyeyoung ;
Liou, Wei-Hyun ;
Chen, Huang-Ming Philip ;
Hsu, Chia-Hung .
OPTICS EXPRESS, 2015, 23 (03) :3230-3235
[2]   Charge carrier mobility in doped disordered organic semiconductors [J].
Arkhipov, VI ;
Heremans, P ;
Emelianova, EV ;
Adriaenssens, GJ ;
Bässler, H .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2004, 338 :603-606
[3]   Well separated trion and neutral excitons on superacid treated MoS2 monolayers [J].
Cadiz, Fabian ;
Tricard, Simon ;
Gay, Maxime ;
Lagarde, Delphine ;
Wang, Gang ;
Robert, Cedric ;
Renucci, Pierre ;
Urbaszek, Bernhard ;
Marie, Xavier .
APPLIED PHYSICS LETTERS, 2016, 108 (25)
[4]   Experimental evidence of exciton capture by mid-gap defects in CVD grown monolayer MoSe2 [J].
Chen, Ke ;
Ghosh, Rudresh ;
Meng, Xianghai ;
Roy, Anupam ;
Kim, Joon-Seok ;
He, Feng ;
Mason, Sarah C. ;
Xu, Xiaochuan ;
Lin, Jung-Fu ;
Akinwande, Deji ;
Banerjee, Sanjay K. ;
Wang, Yaguo .
NPJ 2D MATERIALS AND APPLICATIONS, 2017, 1
[5]   Modulating Optoelectronic Properties of Two Dimensional Transition Metal Dichalcogenide Semiconductors by Photoinduced Charge Transfer [J].
Choi, Jungwook ;
Zhang, Hanyu ;
Choi, Jong Hyun .
ACS NANO, 2016, 10 (01) :1671-1680
[6]   Charge-carrier concentration dependence of the hopping mobility in organic materials with Gaussian disorder [J].
Coehoorn, R ;
Pasveer, WF ;
Bobbert, PA ;
Michels, MAJ .
PHYSICAL REVIEW B, 2005, 72 (15)
[7]   Gold-Mediated Exfoliation of Ultralarge Optoelectronically-Perfect Monolayers [J].
Desai, Sujay B. ;
Madhvapathy, Surabhi R. ;
Amani, Matin ;
Kiriya, Daisuke ;
Hettick, Mark ;
Tosun, Mahmut ;
Zhou, Yuzhi ;
Dubey, Madan ;
Ager, Joel W., III ;
Chrzan, Daryl ;
Javey, Ali .
ADVANCED MATERIALS, 2016, 28 (21) :4053-4058
[8]   Molecule-substrate interaction channels of metal-phthalocyanines on graphene on Ni(111) surface [J].
Dou, Weidong ;
Huang, Shuping ;
Zhang, R. Q. ;
Lee, C. S. .
JOURNAL OF CHEMICAL PHYSICS, 2011, 134 (09)
[9]  
ELKHATIB N, 1988, CAN J CHEM, V66, P2313
[10]   Strong interlayer coupling in van der Waals heterostructures built from single-layer chalcogenides [J].
Fang, Hui ;
Battaglia, Corsin ;
Carraro, Carlo ;
Nemsak, Slavomir ;
Ozdol, Burak ;
Kang, Jeong Seuk ;
Bechtel, Hans A. ;
Desai, Sujay B. ;
Kronast, Florian ;
Unal, Ahmet A. ;
Conti, Giuseppina ;
Conlon, Catherine ;
Palsson, Gunnar K. ;
Martin, Michael C. ;
Minor, Andrew M. ;
Fadley, Charles S. ;
Yablonovitch, Eli ;
Maboudian, Roya ;
Javey, Ali .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2014, 111 (17) :6198-6202