TY  - JOUR
AU  - Cádiz Bedini, A. P.
AU  - Muthmann, S.
AU  - Allgaier, J.
AU  - Bittkau, Karsten
AU  - Finger, Friedhelm
AU  - Carius, Reinhard
TI  - Liquid hydridosilane precursor prepared from cyclopentasilane via sonication at low temperatures without the action of light
JO  - Ultrasonics sonochemistry
VL  - 34
SN  - 1350-4177
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2016-03159
SP  - 289 - 293
PY  - 2017
AB  - We report on a liquid hydridosilane precursor ink prepared via the ultrasonically induced ring-opening polymerisation of cyclopentasilane (Si5H10) without irradiation by ultraviolet light. The sonication is carried out in N2 atmosphere at temperatures between 20 and 75 °C. We use size exclusion chromatography (SEC) to show polymer growth and estimate molecular mass with increasing sonication time. In combination with UV–vis transmission measurements, further SEC analysis is used to compare solutions subjected to either purely thermal or ultrasonic treatment at the same process temperature and for the same duration. Our findings provide strong evidence showing that the initiation of the polymerisation is sonocatalytic in nature and not thermic due to the macroscopic temperature of the solution. The liquid precursor is used to produce homogeneous hydrogenated amorphous silicon (a-Si:H) thin films via spin coating and pyrolytic conversion. The optoelectronic properties of the films are subsequently improved by hydrogen radical treatment. Fourier transform infrared spectroscopy (FTIR) is used to determine a compact film morphology and electrical conductivity measurements show that the layers attain a light-to-dark photosensitivity ratio of 2 × 103 making them suitable for application in optoelectronic devices.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000387626500034
C6  - pmid:27773248
DO  - DOI:10.1016/j.ultsonch.2016.05.039
UR  - https://juser.fz-juelich.de/record/810308
ER  -