Title |
Band structure engineering in organic semiconductors
|
---|---|
Published in |
Science, June 2016
|
DOI | 10.1126/science.aaf0590 |
Pubmed ID | |
Authors |
Martin Schwarze, Wolfgang Tress, Beatrice Beyer, Feng Gao, Reinhard Scholz, Carl Poelking, Katrin Ortstein, Alrun A Günther, Daniel Kasemann, Denis Andrienko, Karl Leo |
Abstract |
A key breakthrough in modern electronics was the introduction of band structure engineering, the design of almost arbitrary electronic potential structures by alloying different semiconductors to continuously tune the band gap and band-edge energies. Implementation of this approach in organic semiconductors has been hindered by strong localization of the electronic states in these materials. We show that the influence of so far largely ignored long-range Coulomb interactions provides a workaround. Photoelectron spectroscopy confirms that the ionization energies of crystalline organic semiconductors can be continuously tuned over a wide range by blending them with their halogenated derivatives. Correspondingly, the photovoltaic gap and open-circuit voltage of organic solar cells can be continuously tuned by the blending ratio of these donors. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 2 | 100% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Scientists | 1 | 50% |
Practitioners (doctors, other healthcare professionals) | 1 | 50% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Germany | 2 | <1% |
Japan | 1 | <1% |
United States | 1 | <1% |
Belgium | 1 | <1% |
Unknown | 238 | 98% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 73 | 30% |
Researcher | 32 | 13% |
Student > Master | 29 | 12% |
Student > Doctoral Student | 11 | 5% |
Professor | 11 | 5% |
Other | 31 | 13% |
Unknown | 56 | 23% |
Readers by discipline | Count | As % |
---|---|---|
Physics and Astronomy | 62 | 26% |
Chemistry | 44 | 18% |
Materials Science | 39 | 16% |
Engineering | 21 | 9% |
Chemical Engineering | 5 | 2% |
Other | 7 | 3% |
Unknown | 65 | 27% |