Photoelectron spectra of polysilanes
- 15 March 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 33 (6) , 4203-4206
- https://doi.org/10.1103/physrevb.33.4203
Abstract
Some organopolysilanes (high-molecular-weight polymers which only contain silicon atoms in their backbone) can be used as highly sensitive, self-developing uv photoresists. To understand the electronic structure of polysilanes and help rationalize their solid-state uv photosensitivity, we have recorded the photoelectron spectra of several polysilanes: poly(β-naphthylmethylsilane), poly(phenylmethylsilane, poly(n-dodecylmethylsilane, and poly(n-propylmethylsilane). We find that if the polymer photoemission spectra can be described in terms of backbone Si-Si and side-chain Si-C levels which do not hybridize (as in the alkyl polysilanes), then the solid-state uv sensitivity of the polymer is high. An explanation of this correlation in terms of the degree of hybridization of the low-lying bonding and antibonding Si-Si levels with the levels of the carbon side-group molecule will be presented.Keywords
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