This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevApplied.7.034018 in citations.
Please use the identifier: http://hdl.handle.net/2128/14713 in citations.
Understanding Mott-Schottky Measurements under Illumination in Organic Bulk Heterojunction Solar Cells
Understanding Mott-Schottky Measurements under Illumination in Organic Bulk Heterojunction Solar Cells
The Mott-Schottky analysis in the dark is a frequently used method to determine the doping concentration of semiconductors from capacitance-voltage measurements, even for such complex systems as polymer:fullerene blends used for organic solar cells. While the analysis of capacitance-voltage measurem...
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Personal Name(s): | Zonno, Irene (Corresponding author) |
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Martinez-Otero, Alberto / Hebig, Jan-Christoph / Kirchartz, Thomas | |
Contributing Institute: |
Photovoltaik; IEK-5 |
Published in: | Physical review applied, 7 (2017) 3, S. 034018 |
Imprint: |
College Park, Md. [u.a.]
American Physical Society
2017
|
DOI: |
10.1103/PhysRevApplied.7.034018 |
Document Type: |
Journal Article |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Solar cells of the next generation |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/14713 in citations.
The Mott-Schottky analysis in the dark is a frequently used method to determine the doping concentration of semiconductors from capacitance-voltage measurements, even for such complex systems as polymer:fullerene blends used for organic solar cells. While the analysis of capacitance-voltage measurements in the dark is relatively well established, the analysis of data taken under illumination is currently not fully understood. Here, we present experiments and simulations to show which physical mechanisms affect the Mott-Schottky analysis under illumination. We show that the mobility of the blend has a major influence on the shape of the capacitance-voltage curve and can be obtained from data taken under reverse bias. In addition, we show that the apparent shift of the built-in voltage observed previously can be explained by a shift of the onset of space-charge-limited collection with illumination intensity. |