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Efficiency enhancement in low-bandgap polymer solar cells by processing with alkane dithiols.
By incorporating a few volume per cent of alkanedithiols in the solution used to spin-cast films comprising a low-bandgap polymer and a fullerene derivative, the power-conversion efficiency of photovoltaic cells is increased from 2.8% to 5.5% through altering the bulk heterojunction morphology.
Processing additives for improved efficiency from bulk heterojunction solar cells.
- Jae Kwan Lee, Wanli Ma, A. Heeger
- Materials Science, ChemistryJournal of the American Chemical Society
- 21 February 2008
Using 1,8-diiodooctane as the processing additive, the efficiency of the BHJ solar cells was improved and the efficiency rating was improved from 3.4% (for the reference device) to 5.1%.
Electrochemical Considerations for Determining Absolute Frontier Orbital Energy Levels of Conjugated Polymers for Solar Cell Applications
- C. Cardona, W. Li, A. Kaifer, D. Stockdale, G. Bazan
- Chemistry, Materials ScienceAdvances in Materials
- 24 May 2011
Narrow bandgap conjugated polymers in combination with fullerene acceptors, as well as the values used for the absolute potentials of standard electrodes, can complicate the comparison of materials properties and determination of structure/property relationships.
Present and Future of Surface-Enhanced Raman Scattering
Prominent authors from all over the world joined efforts to summarize the current state-of-the-art in understanding and using SERS, as well as to propose what can be expected in the near future, in terms of research, applications, and technological development.
Electronic structure and photovoltaic application of BiI3
Rapid recent improvement in photovoltaic efficiency in hybrid lead halide perovskite materials has provided the impetus for understanding other, related main-group halide systems. Here, we show that…
DNA detection using water-soluble conjugated polymers and peptide nucleic acid probes
- B. Gaylord, A. Heeger, G. Bazan
- Chemistry, BiologyProceedings of the National Academy of Sciences…
- 7 August 2002
A simple and highly sensitive assay with optical amplification that uses the improved hybridization behavior of PNA/DNA complexes is demonstrated, allowing detection of target DNA at concentrations of 10 pM with a standard fluorometer.
Streamlined microwave-assisted preparation of narrow-bandgap conjugated polymers for high-performance bulk heterojunction solar cells.
- R. Coffin, J. Peet, James Rogers, G. Bazan
- Chemistry, Materials ScienceNature Chemistry
- 18 October 2009
It is demonstrated that microwave heating in combination with the screening of comonomer reactant ratios can be used to obtain donor-acceptor copolymers with high average molecular weights and properties that make them suitable for solar cell incorporation.
A heterogeneous PNA-based SERS method for DNA detection.
A simple method for ssDNA detection based on SERS signals and PNA slides is reported, revealing that the distribution of nanoparticles is random and that approximately 1 in 10 aggregate sites is responsible for the SERS spectra.
Vibronic contributions to charge transport across molecular junctions
- J. Kushmerick, J. Lazorcik, C. H. Patterson, R. Shashidhar, D. Seferos, G. Bazan
- Chemistry, Physics
- 18 March 2004
We report low-temperature charge transport measurements of metal-molecule-metal junctions. Studies on insulating alkyl and π-conjugated molecular wires provide experimental insight into the coupling…
Method for increasing the photoconductive response in conjugated polymer/fullerene composites
The authors poly(3-hexylthiophene)/[6,6]-phenyl C61-butyric acid methyl ester present a technique for modifying the internal structure of bulk heterojunction films which yields significantly improved…