Thermally stable perovskite solar cell via thermally conductive metal oxide cooperation
발표자
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초록
내용
Thermal stability of perovskite solar cell is crucial due to the inevitable thermal stress when the solar cell is operating. Especially, perovskite layer is the most heated layer when the solar cell operates. However, thermal stability is very low in perovskite solar cells. In this work, thermally conductive metal oxide, Al2O3, is introduced in spiro-OMeTAD for heat dissipation effect. Al2O3-cooperated spiro-OMeTAD shows much higher thermal conductivity (0.234 Wm−1K−1) than pure spiro-OMeTAD (0.135 Wm−1K−1) even the small amount of Al2O3 is introduced. Moreover, we check that small amount of Al2O3 does not affect morphology of spiro-OMeTAD. Therefore, the power conversion efficiency of Al2O3-cooperated perovskite solar cell showed 21.2%, which is comparable with bare perovskite solar cell (21.3%). Especially, thermal stability is significantly increased, which contains 91% of initial power conversion efficiency after 31 days under 85℃ and 85% relative humidity.