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The selfconsistent model for the temperature dependence of photoconversionefficiency $\eta$ for highly efficient silicon solar cells (SCs) is developed.It is demonstrated that effect of the efficiency decrease due to increasingtemperature is less pronounced in the SCs with lower surface recombinationvelocity, thus offering a possibility to improve the cells' performance.  The photoconversion efficiency of the high efficiency silicon solar cells ismodeled for the realistic ambient conditions. The SC operating temperature isdetermined by self-consistently solving the photocurrent, photovoltage, andenergy balance equations, considering both radiative and convective coolingmechanisms. The SC temperature is shown to be substantially higher than theambient temperature even at very high convection coefficients, such as, e.g.,300 $W / (m^2 \cdot K)$, used in our examples. The photoconversion efficiencyfor this case is substantially below the efficiency of thermally stabilized SC,for which the operating temperature is close to the external temperature.  The open-circuit voltage and photoconversion efficiency of the high-qualitysilicon solar cells under concentrated illumination are also investigatedincluding the tradeoff between SCs heating and cooling processes.

Modeling of high-efficiency silicon solar cells in realistic operating conditions