In recent years,AgBiS_(2) nanocrystals(NCs)have emerged as a research hotspot in the field of solar cells due to their excellent optoelectronic properties and environmentally friendly characteristics.Although the theo...In recent years,AgBiS_(2) nanocrystals(NCs)have emerged as a research hotspot in the field of solar cells due to their excellent optoelectronic properties and environmentally friendly characteristics.Although the theoretical power conversion efficiency(PCE)of AgBiS_(2) NC solar cells can reach up to 26%,the current best device only achieved a PCE of 10.84%.Such an enormous efficiency gap is primarily caused by the complex surface defects,severe carrier recombination,and undesirable energy-level mismatches.Therefore,this review comprehensively summarizes recent advancements in AgBiS_(2) NCs,including their crystal structures,optoelectronic properties,synthesis methods,ligand engineering,and device optimization.By fine-tuning synthesis conditions(e.g.,temperature,precursor ratios)and employing ligand exchange strategies(solid-state/liquid-state),significant improvements in material performance have been realized.Furthermore,device structure optimization(e.g.,transport layer selection,interface modification)and energy-level alignment engineering have further enhanced efficiency.Despite decent stabilities of AgBiS_(2) NCs,several challenges such as large-area uniformity and long-term device durability remain unraveled,which may be the major obstacles for their further commercialization.Future advancements in defect control,the development of novel ligands,and encapsulation technologies are expected to expand the applications of AgBiS_(2) NCs in flexible electronics,aerospace,and wearable devices.展开更多
Since the advantages of simple preparation,low-priced,environmental friendliness,and high absorption capacity,deep eutectic solvents(DESs)are considered to have eminent application potential in terms of SO_(2) absorpt...Since the advantages of simple preparation,low-priced,environmental friendliness,and high absorption capacity,deep eutectic solvents(DESs)are considered to have eminent application potential in terms of SO_(2) absorption.However,the absorption rate,selectivity,and reversibility of DESs urgently need to be further improved to meet the requirements of industrialization.In this work,five purine-based DESs were designed and synthesized through the use of 1-ethyl-3-methylimidazolium chloride(EmimCl)as hydrogen bond acceptors(HBAs)plus 6-aminopurine(6-AmP),6-hydroxypurine(6-HoP),and 6-chloropurine(6-ChP)as hydrogen bond donors(HBDs),respectively.The results indicated that the optimal molar ratio of HBAs to HBDs is 7:1,and the absorption capacity of EmimCl + 6-AmP-7 can reach up to 18.118 mol/kg,at 298.15 K and 1.0 bar.Notably,the present purine-based DESs not only achieve gas-liquid equilibrium within 40 s,but also exhibit outstanding reversibility(absorb-desorb more than 30 times)and remarkable selectivity of SO_(2)/CO_(2).Furthermore,a reaction equilibrium thermodynamic model(RETM)equation was employed to investigate the absorption behavior by combining the absorption data under different SO_(2) partial pressures and temperatures.Finally,Fourier-transform infrared(FT-IR)spectroscopy and 1H nuclear magnetic resonance(NMR)were conducted to explore further the formation and SO_(2) absorption mechanism of purine-based DESs.It is revealed that the former is mainly hydrogen bonding interaction among HBAs and HBDs,and the latter is mainly Lewis acid-base interaction plus strong charge-transfer interaction among DESs and SO_(2).Based on the obtained data,it could be confirmed that the SO_(2) absorption includes both physical and chemical absorption.展开更多
基金support from the National Key R&D Program of China(No.2024YFA1409900)National KeyR&D Program of China(No.2021YFB3800100)+4 种基金National Natural Science Foundation of China(Nos.52303335,52402255,62404080,62305111)the BIT University Student Innovation&Entrepreneurship Training Program(No.BIT2024LH010)Fundamental Research Funds for the Central Universities(Nos.2024MS037,2024MS034,2024MS073)High-level Talent Research Start-up Project Funding of Henan Academy of Sciences(No.251820025)the Fundamental Research Fund of the Henan Academy of Sciences(No.20250620008).
文摘In recent years,AgBiS_(2) nanocrystals(NCs)have emerged as a research hotspot in the field of solar cells due to their excellent optoelectronic properties and environmentally friendly characteristics.Although the theoretical power conversion efficiency(PCE)of AgBiS_(2) NC solar cells can reach up to 26%,the current best device only achieved a PCE of 10.84%.Such an enormous efficiency gap is primarily caused by the complex surface defects,severe carrier recombination,and undesirable energy-level mismatches.Therefore,this review comprehensively summarizes recent advancements in AgBiS_(2) NCs,including their crystal structures,optoelectronic properties,synthesis methods,ligand engineering,and device optimization.By fine-tuning synthesis conditions(e.g.,temperature,precursor ratios)and employing ligand exchange strategies(solid-state/liquid-state),significant improvements in material performance have been realized.Furthermore,device structure optimization(e.g.,transport layer selection,interface modification)and energy-level alignment engineering have further enhanced efficiency.Despite decent stabilities of AgBiS_(2) NCs,several challenges such as large-area uniformity and long-term device durability remain unraveled,which may be the major obstacles for their further commercialization.Future advancements in defect control,the development of novel ligands,and encapsulation technologies are expected to expand the applications of AgBiS_(2) NCs in flexible electronics,aerospace,and wearable devices.
基金the financial support from the National Natural Science Foundation of China(Nos.22425808,22178154,and 22108105)Science Foundation of China University of Petroleum,Beijing(Nos.2462024XKBH001,ZX20220042,and ZX20220044).
文摘Since the advantages of simple preparation,low-priced,environmental friendliness,and high absorption capacity,deep eutectic solvents(DESs)are considered to have eminent application potential in terms of SO_(2) absorption.However,the absorption rate,selectivity,and reversibility of DESs urgently need to be further improved to meet the requirements of industrialization.In this work,five purine-based DESs were designed and synthesized through the use of 1-ethyl-3-methylimidazolium chloride(EmimCl)as hydrogen bond acceptors(HBAs)plus 6-aminopurine(6-AmP),6-hydroxypurine(6-HoP),and 6-chloropurine(6-ChP)as hydrogen bond donors(HBDs),respectively.The results indicated that the optimal molar ratio of HBAs to HBDs is 7:1,and the absorption capacity of EmimCl + 6-AmP-7 can reach up to 18.118 mol/kg,at 298.15 K and 1.0 bar.Notably,the present purine-based DESs not only achieve gas-liquid equilibrium within 40 s,but also exhibit outstanding reversibility(absorb-desorb more than 30 times)and remarkable selectivity of SO_(2)/CO_(2).Furthermore,a reaction equilibrium thermodynamic model(RETM)equation was employed to investigate the absorption behavior by combining the absorption data under different SO_(2) partial pressures and temperatures.Finally,Fourier-transform infrared(FT-IR)spectroscopy and 1H nuclear magnetic resonance(NMR)were conducted to explore further the formation and SO_(2) absorption mechanism of purine-based DESs.It is revealed that the former is mainly hydrogen bonding interaction among HBAs and HBDs,and the latter is mainly Lewis acid-base interaction plus strong charge-transfer interaction among DESs and SO_(2).Based on the obtained data,it could be confirmed that the SO_(2) absorption includes both physical and chemical absorption.
