Efficient bilayer heterojunction polymer solar cells with bumpy donor-acceptor interface formed by facile polymer blend

Title
Efficient bilayer heterojunction polymer solar cells with bumpy donor-acceptor interface formed by facile polymer blend
Authors
양희연강남수홍재민송용원김태환임정아
Keywords
polymer solar cell; polymer blend; nanostructure; Bilayer polymer solar cells; Phase separation
Issue Date
2012-11
Publisher
Organic electronics
Citation
VOL 13, NO 11, 2688-2695
Abstract
We demonstrated a facile method for the fabrication of bilayer polymer solar cells with a controlled heterojunction structure via simple polymer blends. The spontaneous phase separation of poly(3-hexylthiophene)/polyethylene glycol blends provides a bumpy electrondonor layer with characteristic circular depressions. The diameter and depth of the circular depressions can be controlled by varying the PEG content of the blend. The deposition of [6,6]-phenyl-C61-butyric acid methyl ester as an electron-acceptor layer then creates an interpenetrating donor–acceptor interface for bilayer heterojunction polymer solar cells. The bumpy morphology of the interface results in a significant enhancement in the power conversion efficiency over that of the bilayer polymer solar cells with a typical planar interface, which is mainly due to an increase of photocurrent. An estimation of the field-dependent possibility of charge separation indicates that charge extraction is more efficient than charge recombination in the bilayer devices and the increase in the interfacial area of solar cells with a bumpy-interface leads to generate more electron-hole pairs at the interface.
URI
http://pubs.kist.re.kr/handle/201004/43014
ISSN
15661199
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE