As environmentally friendly compounds,lead-free perovskites have gained widespread application in the fabrication of solar cells in recent years.Among these,rudorffites such as AgBiI_(4)are considered as promising can...As environmentally friendly compounds,lead-free perovskites have gained widespread application in the fabrication of solar cells in recent years.Among these,rudorffites such as AgBiI_(4)are considered as promising candidates owing to their favorable band structure and exceptional stability.However,the formation of Ag vacancies during the synthetic process poses a significant challenge,severely hindering carrier transport properties.To address this issue,we propose an Ag management strategy utilizing aliphatic ammonium,which serves multiple purposes:it enhances the solubility of AgI in the precursor solution,mitigates phase separation caused by stoichiometric mismatches during AgBiI_(4)film formation,and effectively passivates Ag defects.The butylamine hydroiodide modified AgBiI_(4)solar cells achieved a champion power conversion efficiency of 1.97%,representing a 26%enhancement over the control device.展开更多
基金supported by the National Natural Science Foundation of China(Nos.52173153,12074011,61935016 and 12174013)the National Key Research and Development Program of China(Nos.2022YFB4200503 and 2022YFB3606502).
文摘As environmentally friendly compounds,lead-free perovskites have gained widespread application in the fabrication of solar cells in recent years.Among these,rudorffites such as AgBiI_(4)are considered as promising candidates owing to their favorable band structure and exceptional stability.However,the formation of Ag vacancies during the synthetic process poses a significant challenge,severely hindering carrier transport properties.To address this issue,we propose an Ag management strategy utilizing aliphatic ammonium,which serves multiple purposes:it enhances the solubility of AgI in the precursor solution,mitigates phase separation caused by stoichiometric mismatches during AgBiI_(4)film formation,and effectively passivates Ag defects.The butylamine hydroiodide modified AgBiI_(4)solar cells achieved a champion power conversion efficiency of 1.97%,representing a 26%enhancement over the control device.
