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Title: Direct observation and analysis of annealing-induced microstructure at interface and its effect on performance improvement of organic thin film transistors
Authors: Bao, Qiaoliang
Li, Jun
Li, Chang Ming
Dong, Zhili
Lu, Zhisong
Qin, Fang
Gong, Cheng
Guo, Jun
Keywords: DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films
Issue Date: 2008
Source: Bao, Q., Li, J., Li, C. M., Dong, Z. L., Lu, Z., Qin, F., & et al. (2008). Direct Observation and Analysis of Annealing-Induced Microstructure at Interface and Its Effect on Performance Improvement of Organic Thin Film Transistors. Journal of Physical Chemistry B, 112 (39), 12270–12278.
Series/Report no.: Journal of physical chemistry B
Abstract: For the first time direct observation and analysis of microstructural variations of crystalline domains and grain boundaries at atomic scale in the buried interface of an organic semiconductor thin film of poly(2,6-bis(3-alkylthiophen-2-yl)dithieno[3,2-b;2′,3′-d]thiophene) (PBTDT), a new synthesized solution-processed polymer is achieved for demonstrating a different network nanostructure of crystalline nanofibers at the interface from the outside surface of the film observed. It is also discovered that structural variations of crystalline domains and grain boundaries at an atomic scale caused by annealing, which include larger domains with enhanced crystallinity, reduced π−π stacking distance, reduced disorders in the grain boundaries, and small tilt-angle boundaries well explain the significant performance improvement of the PBTDT based organic thin film transistor (OTFT) after anealing. This work provides a highly resolutioned image on the microstructures at an organic semiconducting interface for deep scientific insights of the OTFT performance improvement through microstructure optimization.
DOI: 10.1021/jp804988h
Rights: © 2008 American Chemical Society
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles


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