fullerenes;
phase morphology;
polymer blends;
solar cells;
X-ray microscopy;
D O I:
10.1002/smll.200600300
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Scanning transmission X-ray microscopy (STXM) was used to provide the first quantitative nanoscale chemical maps of a conjugated polymer/methanofullerene blend. STXM technique utilized a variable energy X-ray beam with a spot size of 50 nm or smaller to probe the bulk chemical composition of thin films. Chemical contrast was obtained from differences in the near-edge X-ray absorption fine structure (NEXAFS) carbon K-edge spectra. The chemical composition was also determined along a line profile by taking a full NEXAFS spectrum at a succession of points, which was then fitted with a weighted sum of pristine spectra. It was observed that (6,6)-phenyl-C61-butyric acid (PCBM) domain plays an important role in device performance by determining whether or not photoabsorption by the PCBM is able to contribute to the overall photocurrent. Short-circuit photocurrent spectra revealed an enhanced contribution by PCBM in chlorobenzene devices.
机构:
Johannes Kepler Univ Linz, Linz Inst Organ Solar Cell, A-4040 Linz, AustriaJohannes Kepler Univ Linz, Linz Inst Organ Solar Cell, A-4040 Linz, Austria
Hoppe, H
Sariciftci, NS
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h-index: 0
机构:
Johannes Kepler Univ Linz, Linz Inst Organ Solar Cell, A-4040 Linz, AustriaJohannes Kepler Univ Linz, Linz Inst Organ Solar Cell, A-4040 Linz, Austria
机构:
Johannes Kepler Univ Linz, Linz Inst Organ Solar Cell, A-4040 Linz, AustriaJohannes Kepler Univ Linz, Linz Inst Organ Solar Cell, A-4040 Linz, Austria
Hoppe, H
Sariciftci, NS
论文数: 0引用数: 0
h-index: 0
机构:
Johannes Kepler Univ Linz, Linz Inst Organ Solar Cell, A-4040 Linz, AustriaJohannes Kepler Univ Linz, Linz Inst Organ Solar Cell, A-4040 Linz, Austria