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The Optical Diode Ideality Factor Enables Fast Screening of Semiconductors for Solar Cells
Author(s) -
Babbe Finn,
Choubrac Leo,
Siebentritt Susanne
Publication year - 2018
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201800248
Subject(s) - solar cell , diode , optoelectronics , photoluminescence , materials science , radiative transfer , semiconductor , solar cell efficiency , optics , physics
In the search for new materials for solar cells, a fast feedback is needed. Radiative efficiency measurements based on photoluminescence (PL) are the tool of choice to screen the voltage a material is capable of. Additionally the dependence of the radiative efficiency on excitation density contains information on the diode ideality factor, which determines in turn the fill factor of the solar cell. Both parameters are immediate ingredients of the efficiency of a solar cell and can be determined from PL measurements, which allow fast feedback. The method to determine the optical diode ideality factor from PL measurements and compare to electrical measurements in finished solar cells are discussed.