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Title: Switching charge-transfer characteristics from p-type to n-type through molecular “doping” (co-crystallization)
Authors: Zhang, Jing
Gu, Peiyang
Long, Guankui
Ganguly, Rakesh
Li, Yongxin
Aratani, Naoki
Yamada, Hiroko
Zhang, Qichun
Keywords: Semiconductor Doping
Charge Transfer
Issue Date: 2016
Source: Zhang, J., Gu, P., Long, G., Ganguly, R., Li, Y., Aratani, N., . . . Zhang, Q. (2016). Switching charge-transfer characteristics from p-type to n-type through molecular “doping” (co-crystallization). Chemical Science, 7(6), 3851-3856. doi:10.1039/C5SC04954G
Series/Report no.: Chemical Science
Abstract: Borrowing an idea from the silicon industry, where the charge-carrier's characteristics can be changed through heteroatom implantation, we believe that the charge transport nature of organic semiconductors can be switched through molecular “doping” (co-crystallization). Here, we report a novel molecule 2,7-di-tert-butyl-10,14-di(thiophen-2-yl)phenanthro[4,5-abc][1,2,5]thiadiazolo[3,4-i]phenazine (DTPTP), which originally is a p-type (0.3 cm2 V−1 s−1) compound, and can be switched to an n-type semiconductor (DTPTP2–TCNQ, 3 × 10−3 cm2 V−1 s−1 under air conditions) through tetracyanoquinodimethane (TCNQ) doping (co-crystallization). Single crystal X-ray studies revealed that TCNQ-doped DTPTP complexes (DTPTP2–TCNQ) adopt a dense one-dimensional (1D) mixed π–π stacking mode with a ratio of DTPTP and TCNQ of 2 : 1, while pure DTPTP molecules utilize a herringbone-packing pattern. Interestingly, theoretical analysis suggested that there is a quasi-2D electron transport network in this host–guest system. Our research results might provide a new strategy, to switch the charge transport characteristics of an original system by appropriate molecular “doping” (co-crystal engineering).
ISSN: 2041-6520
DOI: 10.1039/C5SC04954G
Rights: © 2016 The Author(s) (published by Royal Society of Chemistry). This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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