6533b857fe1ef96bd12b4c9a
RESEARCH PRODUCT
Electrothermal Feedback and Absorption-Induced Open-Circuit-Voltage Turnover in Solar Cells
Henk J. BolinkKoen VandewalZheng TangJorge ÁVilaAxel FischerSascha UllbrichSebastian Reinekesubject
Materials scienceOpen-circuit voltageBand gapbusiness.industryGeneral Physics and Astronomy02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences7. Clean energyImaging phantom0104 chemical sciencesLight intensitySemiconductorIrradiationAbsorption (logic)Atomic physics0210 nano-technologybusinessVoltagedescription
A solar panel gets hot as it works up on the roof, yet photoinduced self-heating is often ignored when characterizing lab-sized samples. The authors present their understanding of the turnover effect in measurements of open-circuit voltage versus light intensity (Suns-${V}_{O\phantom{\rule{0}{0ex}}C}$ curves), which is identified as a unique feature of all semiconductor-based solar cells. This effect is explained in terms of electrothermal feedback arising when the incident irradiation heats up the device. The authors' model fully explains the experimental data, and allows one to determine key device parameters such as the ideality factor and the band gap from a single measurement.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-05-31 | Physical Review Applied |