Charged polymers and their uses in electronic devices
The present invention generally relates to compositions and methods comprising charged polymers. The compositions can be used in a variety of applications, for example, in photovoltaic cells, field-effect transistors, and light emitting diodes. In some embodiments, the backbone of a charged polymer comprises at least one quaternary nitrogen and/or is conjugated.
1. A polymeric composition, comprising:
a polymer backbone comprising at least one repeating unit having the structure:
wherein X ⊖ is an anionic species;
Y is a heteroatom; and
wherein each R 5 can be the same or different and is a suitable substituent, may join together with another R 5 to form a ring, and/or may form a bond with another repeating unit and/or an end-group of the polymer, in accordance with standard valence requirements.
2. A polymeric composition, comprising:
a polymer backbone comprising at least one repeating unit comprising the structure:
wherein indicates the location of the bond to another repeating unit or an end-group;
wherein X ⊖ is an anionic species;
Y is a heteroatom; and
wherein each R 5 can be the same or different and is a suitable substituent, may join together with another R 5 to form a ring, and/or may form a bond with another repeating unit and/or an end-group of the polymer, in accordance with standard valence requirements.
3. A polymeric composition as in claim 1 , wherein each R 5 is H, provided at least two R 5 are a bond to another repeating unit or an end-group.
4. A polymeric composition as in claim 1 , wherein Y is S or O.
5. A polymeric composition as in claim 1 , wherein the at least one repeating unit comprises the following structure:
6. A polymeric composition as in claim 2 , wherein each R 5 is H, provided at least two R 5 are a bond to another repeating unit or an end-group.
7. A polymeric composition as in claim 2 , wherein Y is S or O.
8. A polymeric composition as in claim 2 , wherein the at least one repeating unit comprises the following structure: