Wide band gap perovskite solar cell is the main component of crystalline silicon-perovskite laminated cell.Due to the problems of high defect density and serious phase separation in wide band gap perovskite materials,the development of wide band gap perovskite solar cells is limited.In order to improve these problems,a pre-spin coating method is proposed,that is,a perovskite thin film is prepared by two-step method,and methylamine ethanol solution(MES)and phenylethyl ammonium iodide(PEAI)are evenly coated on the surface of lead iodide layer to complete the pre-spin coating process.After pre-spin coating,the best efficiency of the device is 20.81％,which is better than that of the device without pre-spin coating(19.7％)and the device with single PEAI pre-spin coating(20.2％),and it also shows excellent stability.
perovskite solar cellswide-band gapprespin coatingmethylamine ethanol solutiondefect passivation
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