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• W4318204208 endingPage "141573" @default.
• W4318204208 startingPage "141573" @default.
• W4318204208 abstract "Interface passivation is an effective means to decrease detrimental defects and realize highly efficient and stable perovskite solar cells (PSCs). Nevertheless, most of the interfacial passivators currently used are easily formed mismatched energy levels and impede the extraction of photogenerated charge carriers. Herein, a metal-free H2-phthalocyanine (H2Pc) is reported to passivate the interface defects and improve the crystallinity and energy level alignment. Contrasting metal Zn-phthalocyanine, the pyrrolic nitrogen and NH bond in the structure of the H2Pc molecule exhibit a higher capability to interact with unsaturated Pb and I site. It is found that the defects passivation and improved crystallinity in H2Pc molecule treatment are achieved by the formation of coordination bonding between N atoms and uncoordinated Pb2+ ions and hydrogen bonding between NH bond and I (iodine). Simultaneously, the H2Pc treatment can also improve energy level alignment and promote the charge extraction from perovskite to the hole transport material layer. As a result, a champion power conversion efficiency (PCE) of 20.59 % is achieved for the H2Pc PSCs, which is higher than that of 18.54 % for the ZnPc PSCs and 16.50 % for the pristine PSCs. Meanwhile, the H2Pc device shows significantly improved moisture, thermal, and illumination stability and with retaining over 90 % of its initial PCE after aging for 1000 h at about 20 % relative humidity in ambient conditions. The present work provides a practical and efficient method of simultaneous defect passivation and energy level modulation and toward the purpose of attaining superior performance PSCs and other perovskite-based electronics." @default.
• W4318204208 created "2023-01-27" @default.
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• W4318204208 date "2023-03-01" @default.
• W4318204208 modified "2023-10-18" @default.
• W4318204208 title "Simultaneous defect passivation and energy level modulation by multifunctional phthalocyanine for efficient and stable perovskite solar cells" @default.
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• W4318204208 doi "https://doi.org/10.1016/j.cej.2023.141573" @default.
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