1:15 PM - 1:30 PM
▲ [15p-A401-2] Assessment of the Role of Inorganic Electron Selective Layers in the Performance of Normal Structure Tin Halide Perovskite Solar Cells
Keywords:Tin halide perovskite, Sn(II) oxidation, Normal structure
Tin halide perovskite (THP) solar cells are promising candidates to replace toxic lead halide counterparts. Recent studies have shown that efficient THP solar cells are fabricated in an inverted p-i-n structure instead of a normal n-i-p structure. Here, we aim to investigate the reason for this inadequacy of the photoelectric performance of THP solar cells with normal structure.
All inorganic THP CsSnI3 and various electron selective layers were fabricated in a nanocomposite structure of CsSnI3/metal-oxide using the conventional solution coating method. The band gap and electrical conductivity of CsSnI3 layers were varied in a linear way. We observed that the lack of photoelectric properties in n-i-p solar cells is related to the generation of Sn(IV), which leads to increased electrical conductivity. Interestingly, the high electrical conducting (due to formed Sn(IV)) THP nanocomposites can be used to convert waste heat into electrical energy. The origin of Sn(IV) and the poor photoelectric performance in solar cells with normal structures and the thermoelectric applications of such films will be discussed at the conference.
All inorganic THP CsSnI3 and various electron selective layers were fabricated in a nanocomposite structure of CsSnI3/metal-oxide using the conventional solution coating method. The band gap and electrical conductivity of CsSnI3 layers were varied in a linear way. We observed that the lack of photoelectric properties in n-i-p solar cells is related to the generation of Sn(IV), which leads to increased electrical conductivity. Interestingly, the high electrical conducting (due to formed Sn(IV)) THP nanocomposites can be used to convert waste heat into electrical energy. The origin of Sn(IV) and the poor photoelectric performance in solar cells with normal structures and the thermoelectric applications of such films will be discussed at the conference.