Accelerated photopolymerization and increased mobility in C[sub 60] field-effect transistors studied by ultraviolet photoelectron spectroscopy

Shimada, T.; Suetsugu, T.; Miyadera, T.; Yamamoto, Y.; Koma, A.; Saiki, K.; Kudo, K.
March 2004
Applied Physics Letters;3/29/2004, Vol. 84 Issue 13, p2439
Academic Journal
Ultraviolet photoelectron spectroscopy (UPS) of C[sub 60] thin-film field-effect transistors was measured with biasing gate voltages. A time-dependent change in the electronic structure of the C[sub 60] film was observed during the UPS measurement, which has never been observed in a C[sub 60] film grown on a conductive substrate. The change was attributed to the accelerated polymerization of C[sub 60] by comparing the UPS with that of the photopolymerized C[sub 60]. The polymerization was associated with the increase in the field-effect electron mobility. This result indicates that mobile carriers produce reactive radicals in organic semiconductors. © 2004 American Institute of Physics.


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