This study introduces a multifunctional coordination approach to enhance wide bandgap(WBG)tin(Sn)perovskite solar cells(PSCs)by incorporating a natu-rally derived Vitamin H(Biotin)complex into the perovskite precursor...This study introduces a multifunctional coordination approach to enhance wide bandgap(WBG)tin(Sn)perovskite solar cells(PSCs)by incorporating a natu-rally derived Vitamin H(Biotin)complex into the perovskite precursor.The Bio-tin complex exhibits strong chemical interaction with Sn^(2+)via its ureido ring(C= O,-NH),valeric acid chain(-COO^(-)),and tetrahydrothiophene(S C)functionalities.This multidentate interaction further helps to regulate crystal growth kinetics,resulting in compact,pinhole-free films with enhanced surface homogeneity.Furthermore,Biotin effectively passivates uncoordinated Sn sites,mitigates Sn^(2+)oxidation,and suppresses antisite defects,thereby reducing non-radiative recombination and ion migration.As a result,the optimized device demonstrates a record-high power conversion efficiency of 12.8%(independently certified at 12.5%)and an open-circuit voltage(V_(oc))of 1.03 V for WBG Sn PSCs.Notably,the device exhibits outstanding ambient stability,retaining almost 80%of its initial efficiency after 1460 h of storage without encapsulation,highlighting the potential of the Biotin complex for high-performance and durable lead-free perovskite photovoltaics.展开更多
Halide perovskites have been extensively studied for use as light-emitting diodes(LEDs)in next-generation displays due to their beneficial characteristics,including their high color purity and wide color gamut.Halide ...Halide perovskites have been extensively studied for use as light-emitting diodes(LEDs)in next-generation displays due to their beneficial characteristics,including their high color purity and wide color gamut.Halide perovskites can be categorized into four representative structures:three-dimensional(3D)bulk,two-dimensional(2D),quasi-two-dimensional(quasi-2D),and quantum dot(QD).Recently,excellent advances in the performance of perovskite LEDs(PeLEDs),especially those with quasi-2D and QD architectures,have been demonstrated with the incorporation of organic chain ligands.Ligands can both modify the structure of PeLEDs,such as forming multi-quantum wells in quasi-2D PeLEDs and essential passivation layers in QD PeLEDs,and also enhance their optical performance.The appropriate use of ligands in PeLEDs can thus lead to greater luminescence,current efficiency,power efficiency,and external quantum efficiency.In this review,the principal roles of ligands in quasi-2D and QD PeLEDs are systematically summarized.Furthermore,current limitations and future perspectives are discussed in detail.展开更多
基金National Research Foundation of Korea,Grant/Award Numbers:NRF-RS-2023-00217270,RS-2023-00212744,RS-2024-00436187KETEP,Grant/Award Number:RS-2023-00236664。
文摘This study introduces a multifunctional coordination approach to enhance wide bandgap(WBG)tin(Sn)perovskite solar cells(PSCs)by incorporating a natu-rally derived Vitamin H(Biotin)complex into the perovskite precursor.The Bio-tin complex exhibits strong chemical interaction with Sn^(2+)via its ureido ring(C= O,-NH),valeric acid chain(-COO^(-)),and tetrahydrothiophene(S C)functionalities.This multidentate interaction further helps to regulate crystal growth kinetics,resulting in compact,pinhole-free films with enhanced surface homogeneity.Furthermore,Biotin effectively passivates uncoordinated Sn sites,mitigates Sn^(2+)oxidation,and suppresses antisite defects,thereby reducing non-radiative recombination and ion migration.As a result,the optimized device demonstrates a record-high power conversion efficiency of 12.8%(independently certified at 12.5%)and an open-circuit voltage(V_(oc))of 1.03 V for WBG Sn PSCs.Notably,the device exhibits outstanding ambient stability,retaining almost 80%of its initial efficiency after 1460 h of storage without encapsulation,highlighting the potential of the Biotin complex for high-performance and durable lead-free perovskite photovoltaics.
基金supported by a National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(NRF-2021R1A2C4002045 and 2021R1A4A2001687).
文摘Halide perovskites have been extensively studied for use as light-emitting diodes(LEDs)in next-generation displays due to their beneficial characteristics,including their high color purity and wide color gamut.Halide perovskites can be categorized into four representative structures:three-dimensional(3D)bulk,two-dimensional(2D),quasi-two-dimensional(quasi-2D),and quantum dot(QD).Recently,excellent advances in the performance of perovskite LEDs(PeLEDs),especially those with quasi-2D and QD architectures,have been demonstrated with the incorporation of organic chain ligands.Ligands can both modify the structure of PeLEDs,such as forming multi-quantum wells in quasi-2D PeLEDs and essential passivation layers in QD PeLEDs,and also enhance their optical performance.The appropriate use of ligands in PeLEDs can thus lead to greater luminescence,current efficiency,power efficiency,and external quantum efficiency.In this review,the principal roles of ligands in quasi-2D and QD PeLEDs are systematically summarized.Furthermore,current limitations and future perspectives are discussed in detail.
