Abstract
Cesium-containing triple cation perovskites are attracting significant attention as suitable tandem partners for silicon solar cells. The perovskite layer of a solar cell must strongly absorb the visible light and be transparent to the infrared light. Optical transmittance measurements of perovskite layers containing different cesium concentrations (0–15%) were carried out on purpose to evaluate the utility of the layers for the fabrication of monolithic perovskite/silicon tandem solar cells. The transmittance of the layers weakly depended on cesium concentration in the infrared spectral range, and it was more than 0.55 at 997 nm wavelength. It was found that perovskite solar cells containing 10% of cesium concentration show maximum power conversion efficiency.
Highlights
The promising features of a perovskite/silicon tandem solar cell have attracted considerable attention in recent years [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
It is known that the crystalline silicon solar cell has demonstrated a certified power conversion efficiency of 26.6% [18,19] which is close to its theoretical efficiency limit of 33.3% [20]
We present an experimental study of structure and optical properties of perovskite Csx (MA0.17 FA0.83 )(1−x) Pb(I0.83 Br0.17 )3 layers having different cesium concentration as well as photoelectric properties of solar cells fabricated on their base
Summary
The promising features of a perovskite/silicon tandem solar cell have attracted considerable attention in recent years [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]. The coating of a silicon solar cell with a thin perovskite layer absorbing high energy photons allows to considerably decrease the negative effect of the hot carriers. Excellent bandgap tunability allows to use a perovskite layer as a top sub-cell on any bottom cell [31,32,33,34]. Triple cation perovskites of the generic form “Csx (MA0.17 FA0.83 )(1−x) Pb(I0.83 Br0.17 )3 “ developed in [35] can be suitable candidates as tandem companions for silicon solar cells. We present an experimental study of structure and optical properties of perovskite Csx (MA0.17 FA0.83 )(1−x) Pb(I0.83 Br0.17 ) layers having different cesium concentration as well as photoelectric properties of solar cells fabricated on their base
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