Polymer functionalized n-type single wall carbon nanotube photovoltaic devices
Abstract
Photovoltaic conversion was achieved from high-density p-n heterojunctions formed between polymer functionalized n-type single wall carbon nanotubes (SWNTs) and underlying p-type Si substrate. Functionalization of SWNTs by amine-rich polymers results in the evolution of tubes from p-type to n-type, and the polyethylene imine (PEI) functionalized SWNT film can serve as both photogeneration sites and a charge carrier collecting/transport layer. Photoremoval of oxygen adsorbed on the nanotubes prior to PEI functionalization can increase the conversion efficiency of the polymer functionalized n-type SWNT photovoltaic devices.
- Publication:
-
Applied Physics Letters
- Pub Date:
- January 2010
- DOI:
- Bibcode:
- 2010ApPhL..96c3110L
- Keywords:
-
- adsorbed layers;
- carbon nanotubes;
- nanotube devices;
- p-n heterojunctions;
- polymer films;
- solar cells;
- 88.40.H-;
- 73.63.Fg;
- 85.35.Kt;
- 73.61.Ph;
- 73.40.Lq;
- 68.43.-h;
- Nanotubes;
- Nanotube devices;
- Polymers;
- organic compounds;
- Other semiconductor-to-semiconductor contacts p-n junctions and heterojunctions;
- Chemisorption/physisorption: adsorbates on surfaces