the CsPbBr solar cells based on different concentrations of PbBr are prepared by a multi-step spin coating method. The effect of different PbBr concentrations on the photovoltaic performance of CsPbBr solar cells is studied. The results showed that compared with CsPbBr solar cells based on 0.6
0.8 and 1.2 mol/L PbBr
the short-circuit current density of CsPbBr solar cell with 1.0 mol/L PbBr is effectively improved (7.47 mA/cm)
which leads to an improvement in device efficiency (7.30%). Characterization tests revealed that the CsPbBr₃ absorber layer prepared with a PbBr concentration of 1.0 mol/L exhibits better uniformity
lower roughness
higher light absorption
and stronger electron-hole separation capability
leading to improved device efficiency.
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references
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