【摘 要】
：
The existence of defects in perovskite films is a major obstacle that prevents perovskite solar cells(PSCs)from high efficiency and long-term stability.A variety of additives have been introduced into perovskite films for reducing the number of defects.Le
【机 构】
：
WA School of Mines:Minerals,Energy and Chemical Engineering(WASM-MECE),Curtin University,Perth,WA 68
论文部分内容阅读
The existence of defects in perovskite films is a major obstacle that prevents perovskite solar cells(PSCs)from high efficiency and long-term stability.A variety of additives have been introduced into perovskite films for reducing the number of defects.Lewis base-based additive engineering has been considered as an effective way to eliminate defects,especially the defects caused by the uncoordinated Pb2+.In this work,for the first time,a bilateral cyano molecule(succinonitrile,SN)which is a commonly used plasti-cizer in solid electrolyte of solid-state lithium batteries was selected as an additive to modify organic-inorganic hybrid perovskite films in PSCs.SN is featured with two cyano groups(-C≡N)distributing at both terminals of the carbon chain,providing two cross-linking points to interact with perovskites crys-tals via coordinating with uncoordinated Pb2+and forming hydrogen bonds with-NH2 groups in per-ovskite.It was found that the addition of SN into perovskite precursor solution could effectively reduce defects,particularly inhibit the appearance of Pb0 and thus suppress trap-assisted nonradiative charge carrier recombination.As a result,the efficiency of CH3NH3PbI3(Cl)(MAPbI3(Cl))-based PSCs was improved from 18.4％to 20.3％with enhanced long-term stability at N2 and humid air atmosphere.This work provides a facile and effective strategy to enhance the PCE and stability of PSCs simultaneously,facilitating the commercialization of PSCs.
其他文献
For designing batteries with high-rate and long-life,electronic/ionic transport and reaction must be uni-fied for metal oxide electrodes.However,it remains challenging for effectively integrating the whole sub-strate/active materials/electrolyte interface
Recently,two dimensional InSe attracts great attentions as potential hydrogen production photocatalysts.Here,comprehensive investigations on the hydrogen evolution reaction activity of InSe monolayer with 3d transition metal doping and biaxial strain were
The α phase Mo carbide has been widely investigated recently for its high activity in hydrogen production from water gas shift(WGS)reaction.However,high loading of noble metals as well as high economic and environmental cost derived from high-temperature
Hydrogen has been deemed as one of the most efficient en-ergy carriers for a broad variety of industrial applications[1,2].Large-scale,low-cost hydrogen production,safe storage and de-livery represent a tremendous technological challenge and have become a
Colloidal synthesis method such as oleylamine(OAm)-stabilized process is of great interest for obtain-ing uniform and highly dispersed platinum nanoparticle catalysts,yet the ligand may unavoidably in-hibit their electro-catalytic performance.Thus,fully r
The sluggish four-electron transfer of the oxygen evolution reaction(OER)limits the performance of water electrolyzers.Hence,OER electrocatalysts based on earth-abundant elements are urgently needed.Heteroatom doping has been an efficient approach to boos
Conversion-type reaction anode materials with high specific capacity are attractive candidates to improve lithium ion batteries(LIBs),yet the rapid capacity fading and poor rate capability caused by drastic vol-ume change and low electronic conductivity g
MXenes are a family of two-dimensional(2D)transition metal carbides,carbonitrides/nitrides with supe-rior physical and chemical properties,which have attracted extensive attention since the discovery in 2011.The impressive electrochemical activity of MXen
Electronic structures,which play a key role in determining electrical and optical properties of π-conjugated organic materials,have attracted tremendous interest.Efficient thermoelectric(TE)conver-sion of organic materials has rigorous requirements on ele
Heterogeneously catalyzed hydrolytic dehydrogenation of ammonia borane is a remarkable structure sen-sitive reaction.In this work,a strategy by using polyoxometalates(POMs)as the ligands is proposed to engineer the surface and electronic properties of Pt/