【摘 要】
：
Balancing charge generation and low energy loss (Eloss),especially in the wide spectral absorption region is critical to obtain high-performance organic photovoltaics (OPVs).Therefore,Y11-M and Y11-EB are designed and synthesized through modifying alkyl c
【机 构】
：
College of Chemistry and Chemical Engineering,Central South University,Changsha 410000,Hunan,China;C
论文部分内容阅读
Balancing charge generation and low energy loss (Eloss),especially in the wide spectral absorption region is critical to obtain high-performance organic photovoltaics (OPVs).Therefore,Y11-M and Y11-EB are designed and synthesized through modifying alkyl chains on different nitrogen aromatic rings of the reported non-fullerene acceptor Y11.Although all the molecules have almost similar low band-gap(around 1.30 eV),Y11-M and Y11-EB exhibit wider absorption in 410-870 nm region.Eventually,the conventional devices based on Y11-M and Y11-EB possess more efficient charge generation with low Eloss (around 0.44 eV),In addition,outstanding efficiencies of 16,64％ and 17,15％ with the fill factor of 76.15％ and 74.73％ are obtained in PM6:Y11-M and PM6:Y11-EB-based devices,both higher than Y11:PM6.The results highlight the importance of rational alkyl chains optimization,and a good structure-property relationship is established as well.
其他文献
In recent years,more and more efforts are devoting to clean energy,renewable energies in particular to achieving net zero car-bon dioxide emissions [1].However,renewable energies,like solar power and wind power,are generally intermittent and random,hinder
Inefficient electrocatalysts and high-power consumption are two thorny problems for electrochemical hydrogen (H2) production from acidic water electrolysis.Herein we report the one-pot precise synthesis of ultrafine Au core-PtAu alloy shell nanowires (Au@
The lithium (Li) metal anode is an integral component in an emerging high-energy-density rechargeable battery.A composite Li anode with a three-dimensional (3D) host exhibits unique advantages in sup-pressing Li dendrites and maintaining dimensional stabi
Two-dimensional (2D) metal organic frameworks (MOFs) are emerging as low-cost oxygen evolution reaction (OER) electrocatalysts,however,suffering aggregation and poor operation stability.Herein,ultrafine Fe3O4 nanoparticles (diameter:6 ± 2 nm) are homogene
Interfacial engineering to alter the configuration of active sites in heterogeneous catalysts is a potential strategy for activity enhancement,but it remains unelucidated for metal-organic frameworks (MOFs).Here,we demonstrate that the surface of two-dime
With the increasing popularity of new energy electric vehicles,the demand for lithium-ion batteries(LIBs) has been growing rapidly,which will produce a large number of spent LIBs.Therefore,recycling of spent LIBs has become an urgent task to be solved,oth
Bulk sulfur incorporating 3 wt％ gold nano-powder is investigated as possible candidate to maximize the fraction of active material in the Li-S battery cathode.The material is prepared via simple mixing of gold with molten sulfur at 120 ℃,quenching at room
In recent years,great progress has been achieved for organic-inorganic halide perovskites due to their excellent optoelectronic properties and stability for photovoltaics,light emitting diodes,and high-energy radiation detection [1-5].One-dimensional (1D)
While serious stability issues impede the commercialization of perovskite solar cells (PSCs),two-dimensional (2D) perovskites based on fluorinated bulky cations have emerged as more intrinsically stable materials.However,the influence of fluorination degr
A good deal of studies have proven that effective exciton dissociation and fast hole transport can operate efficiently in non-fullerene organic photovoltaics (OPVs) despite nearly zero driving force.Even so,whether such a phenomenon is universal and how s