首页|A short overview of the lead iodide residue impact and regulation strategies in perovskite solar cells
A short overview of the lead iodide residue impact and regulation strategies in perovskite solar cells
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Lead iodide(PbI2)is a vital raw material for preparing perovskite solar cells(PSCs),and it not only takes part in forming the light absorption layer but also remains in the grain boundary as a passivator.In other words,the PbI2 content in the precursor and as formed film will affect the efficiency and stability of the PSCs.With moderate residual PbI2,it passivates the bulk/surface defects of perovskite,reduces the inter-facial recombination,promotes the perovskite stability,minimizes the device hysteresis,and so on.Deficient PbI2 residue will reduce the interfacial passivation effect and device performance.In addition to facilitating the non-radiative recombination,over PbI2 residue can also lead to electronic insulation in the grain boundary and deteriorate the device performance.However,the impact and regulation of PbI2 residue on the device performance and stability is still not fully understood.Herein,a comprehen-sive and detailed review is presented by discussing the PbI2 residue impact and its regulation strategies(i.e.,elimination,facilitation and conversion of the residue PbI2)to manipulate the PbI2 content,distri-bution and forms.Finally,we also show future outlooks in this field,with an aim to help further the pro-gression of high-efficiency and stable PSCs.
Lead iodideResidueRegulationPerovskite solar cellsEfficiencyStability
Eng Liang Lim、Zhanhua Wei
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Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing,Institute of Luminescent Materials and Information Displays,College of Materials Science and Engineering,Huaqiao University,Xiamen 361021,Fujian,China
国家自然科学基金国家自然科学基金国家自然科学基金福建省自然科学基金福建省自然科学基金Scientific Research Funds of Huaqiao University
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