【摘 要】
：
The hole transport material(HTM)plays an extremely important role to determine the power conversion efficiency(PCE)and the stability of perovskite solar cells(PSCs).Herein,we report an effective strategy to improve the performance of HTMs by introducing-C
【机 构】
：
Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials,Taiy
论文部分内容阅读
The hole transport material(HTM)plays an extremely important role to determine the power conversion efficiency(PCE)and the stability of perovskite solar cells(PSCs).Herein,we report an effective strategy to improve the performance of HTMs by introducing-CF3 groups via the rational decorative mode.Upon direct attachment or nonconjugated alkoxyl bridging of-CF3 groups on the terminal diphenylamines,the resulting molecular HTMs,i.e.,2,7-BCzA4CF3 and 2,7-BCzA4OCCF3,show distinct properties.Compared with 2,7-BCzA4CF3,the nonconjugated alkoxyl bridging-CF3 group-based 2,7-BCzA4OCCF3 exhibits better thermal stability,hydrophobicity,and a dramatically upgraded hole mobility by 135.7-fold of magnitude to 1.71×10-4cm2 V-1 S-1.The PSCs with 2,7-BCzA4OCCF3 as HTM exhibit an PCE of up to 20.53％and excellent long-term stability,maintaining 92.57％of their performance for 30 days in air with humidity of 30％without encapsulation.This work provides beneficial guidelines for the design of new HTMs for efficient and stable PSCs.
其他文献
The increased demand of electronic devices promotes the development of advanced and more efficient energy storage devices,such as batteries.Lithium-ion batteries(LIBs)are the most studied battery sys-tems due to their high performance.Among the different
In recent years,perovskite solar cells(PSCs)have become a much charming photovoltaic technology and have triggered enormous studies worldwide,owing to their high efficiency,low cost and ease of prepa-ration.The power conversion efficiency has rapidly incr
Tin(Sn)metal foil is a promising anode for next-generation high-energy-density lithium-ion batteries(LIBs)due to its high capacity and easy processibility.However,the pristine Sn foil anode suffers nonuni-form alloying/dealloying reaction with lithium(Li)
Aqueous rechargeable zinc batteries are getting increasing attention for large-scale energy storage owing to their advantages in terms of cost,environmental friendliness and safety.Here,the layered puckered γ\'-V2O5 polymorph with a porous morphology is
Owing to the ever-increasing charging demand for portable electronics,display devices and wearable electronic textiles,flexi-ble and lightweight solar cells are highly urgent to be developed.
Carbonaceous materials are the most promising candidates as the anode for sodium-ion batteries(SIBs),however,they still suffer from low electric conductivity and sluggish sodium ion(Na+)reaction kinetics.Appropriate composition modulation using heteroatom
Photoelectrochemical (PEC) fuel generation from water splitting and CO2 reduction (CO2R) utilizing solar energy holds immense potential to solve the current energy and environmental issues.In the past dec-ades,numerous studies have been devoted to this fa
Double-atom catalysts (DACs) have emerged as an enhanced platform of single-atom catalyst for promot-ing electrocatalytic CO2 reduction reaction (CO2RR).Herein,we present a density-functional theory study on CO2RR performance of seven C2N-supported homo-a
Lithium-sulfur(Li-S)batteries are considered as one of the promising next-generation energy storage sys-tems because of their high energy density.While the low utilization of sulfur and sluggish reaction kinet-ics would lead to degradation of electrochemi
2H-MoS2 is a well-studied and promising non-noble metal electrocatalyst for heterogeneous reactions,such as the hydrogen evolution reaction(HER).The performance is largely limited by the chemically inert basal plane,which is unfavorable for surface adsorp