Engineered solid-state aggregates in brickwork stacks of n-type organic semiconductors: a way to achieve high electron mobility

被引:4
|
作者
Giri, Indrajit [1 ]
Chhetri, Shant [1 ]
John P., Jesslyn [1 ]
Mondal, Madalasa [1 ]
Dey, Arka Bikash [2 ]
Vijayaraghavan, Ratheesh K. [1 ]
机构
[1] Indian Inst Sci Educ & Res, Dept Chem Sci, Kolkata 741246, India
[2] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany
关键词
FIELD-EFFECT TRANSISTORS; CHARGE-TRANSPORT; DERIVATIVES; PROPERTY; POLYMERS; DESIGN;
D O I
10.1039/d4sc02339k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Efficient, economically viable n-type organic semiconductor materials suitable for solution-processed OFET devices with high electron mobility and ambient stability are scarce. Merging these attributes into a single molecule remains a significant challenge and a careful molecular design is needed. To address this, synthetic viability (achievable in fewer than three steps) and using cost-effective starting materials are crucial. Our research presents a strategy that meets these criteria using naphthalene diimide (NDI) core structures. The approach involves a simple synthesis process with a cost of $ 5-10 per gram for the final products. This paper highlights our success in scaling up the production using affordable known reagents, creating ambient condition solution-processed OFET devices with impressive electron mobility, on-off current ratio (1 cm2 V-1 s-1 and Ion/Ioff similar to 109) and good ambient stability (more than 100 h). We conducted a comprehensive study on EHNDIBr2, a material that demonstrates superior performance due to its unique supramolecular arrangement in its brickwork stack. This was compared with two similar structures to validate our findings. The superior performance of EHNDIBr2 is attributed to the effective interlocking of charge-hopping units within the NDI core in its brickwork stack. Our findings include detailed electronic, spectroscopic, and microscopic analyses of these layers. Superior supramolecular packing and thereby efficient electron transport in economically viable n-type organic semiconductor materials suitable for solution-processed OFET devices yield high electron mobility and ambient stability.
引用
收藏
页码:9630 / 9640
页数:11
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