Abstract
Nanoimprint with a large-scale nanoporous Si mold is developed to fabricate high density periodic nanopillars (∼ 1010 cm2) in various functional polymers. A anodic alumina membrane is first obtained using electrochemical anodization. The membrane is used as a mask for a two-step plasma etching process to obtain a Si mold of 50-80 nm wide and 100-900 nm deep pores. The mold is used in nanoimprint lithography to fabricate ordered and high density polymer nanopillars and nanopores in SU-8, hydrogen silsesquixane, polymethylmethacrylate, poly(3-hexylthiophane) (P3HT), and phenyl-C61-butyric acid methyl ester (PCBM). Then, the imprinted P3HT nanopillars were used to make bulk heterojunction solar cells by depositing PCBM on top of the pillars. Imprinting provides a way to precisely control the interdigitized heterojunction morphology, leading to improved solar cell performance.
Original language | English (US) |
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Pages (from-to) | 2562-2566 |
Number of pages | 5 |
Journal | Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures |
Volume | 26 |
Issue number | 6 |
DOIs | |
State | Published - Dec 11 2008 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering