Open AccessShockley-Queisser analysis of the temperature-efficiency correlation of solar cells in the presence of non-radiative heat transfer
Author(s) -
Zheng Zhang,
Kaifeng Chen,
Shanhui Fan,
Zhe Chen
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.434751
Subject(s) - emissivity , materials science , molar absorptivity , band gap , optics , radiative transfer , solar cell efficiency , infrared , silicon , solar cell , optoelectronics , physics
An empirical negative T cell - η correlation has been widely applied, without careful justifications, to evaluate the efficiency (η) increase of solar cells due to their temperature (T cell ) decrease. Here, a framework is introduced to simultaneously compute T cell and η. This model confirms the negative T cell - η correlation if the above-bandgap absorptivity (α I ) is not suppressed in the optimization of the sub-bandgap reflectivity (ρ II ) or the infrared emissivity, otherwise it may suggest a positive correlation. It further gives a guideline to enhance η of silicon cells under typical conditions: every 1% increase of α I is equivalent to a 57% increase of ρ II .