Duan Research Group

Hetero-integrated Nanostructures and Nanodevices


Assembled semiconductor nanowire thin films for high performance flexible macroelectronics

X. Duan

MRS Bull. 32, 134-141 (2007)

A new concept of macroelectronics using assembled semiconductor nanowire thin films holds the promise of significant performance improvement. In this new concept, a thin film of oriented semiconductor nanowires is used to produce thin-film transistors (TFTs) with conducting channels formed by multiple parallel single-crystal nanowire paths. There fore, charges travel from source to drain within single crystals, ensuring high carrier mobility. Recent studies have shown that high-performance silicon nanowire TFTs and high-frequency circuits can be readily produced on a variety of substrates including glass and plastics using a solution assembly process. The device performance of these nanowire TFTs not only greatly surpasses that of solution-processed organic TFTs, but is also significantly better than that of conventional amorphous or polycrystalline silicon TFTs, approaching single-crystal silicon-based devices. Furthermore, with a similar frame-work, Group III-V or II-VI nanowire or nanoribbon materials of high intrinsic carrier mobility or optical functionality can be assembled into thin films on flexible substrates to enable new multifunctional electronics/optoelectronics that are not possible with traditional macroelectronics. This can have an impact on a broad range of existing applications, from flat-panel displays to image sensor arrays, and enable a new generation of flexible, wearable, or disposable electronics for computing, storage, and wireless communication.
UCLA, Department of Chemistry and Biochemistry
607 Charles E. Young Drive East, Box 951569
Los Angeles, CA 90095-1569
E-mail: xduan@chem.ucla.edu