Correction for 'Shear-induced polydomain structures of nematic lyotropic chromonic liquid crystal disodium cromoglycate' by Hend Baza et al., Soft Matter, 2020, 16, 8565-8576.
Correction for 'Shear-induced polydomain structures of nematic lyotropic chromonic liquid crystal disodium cromoglycate' by Hend Baza et al., Soft Matter, 2020, 16, 8565-8576.
Electron transport materials (ETM) play an important role in the improvement of efficiency and stability for inverted perovskite solar cells (PSCs). This work reports an efficient ETM, named PDI‐C 60 , by the combina...
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Electron transport materials (ETM) play an important role in the improvement of efficiency and stability for inverted perovskite solar cells (PSCs). This work reports an efficient ETM, named PDI‐C 60 , by the combination of perylene diimide (PDI) and fullerene. Compared to the traditional PCBM, this strategy endows PDI‐C 60 with slightly shallower energy level and higher electron mobility. As a result, the device based on PDI‐C 60 as electron transport layer (ETL) achieves high power conversion efficiency (PCE) of 18.6 %, which is significantly higher than those of the control devices of PCBM (16.6 %) and PDI (13.8 %). The high PCE of the PDI‐C 60 ‐based device can be attributed to the more matching energy level with the perovskite, more efficient charge extraction, transport, and reduced recombination rate. To the best of our knowledge, the PCE of 18.6 % is the highest value in the PSCs using PDI derivatives as ETLs. Moreover, the device with PDI‐C 60 as ETL exhibits better device stability due to the stronger hydrophobic properties of PDI‐C 60 . The strategy using the PDI/fullerene hybrid provides insights for future molecular design of the efficient ETM for the inverted PSCs.
作者:
AILOR, WILLIAM H.REINHART, FRED M.William H. Ailor has been a member of the Chemical Metallurgy Section of the Metallurgical Research Division
Reynolds Metals Company for nine years. He holds degrees in chemistry and chemical engineering from the University of Tampa Florida and North Carolina State. He is Task Force Chairman of an ASTM 20-Year Test Program for the atmospheric corrosion of metals secretary of ASTM Committee B-3 and is a member of the Electrochemical Society the National Association of Corrosion Engineers and the American Society of Naval Engineers. He formerly taught diesel engineering at North Carolina State. He is a Lieutenant Commander in the Naval Reserve. During World War II he served as engineering officer afloat and later as commanding officer of USS PC 616 and USS Belet (APD-109). Recalled to service in the Korean conflict he served 17 months as executive officer of the USS Robinson (DD 562). He is in the active reserve and formerly was commanding officer of Naval Reserve Surface Division 6–42 in Jacksonville Florida. Currently he is training officer of MSTS Co. 5-1 in Richmond Va. Fred M. Reinhart has been a Senior Project Scientist (Metallurgist) Materials Division
Civil Engineering Department U. S. Naval Civil Engineering Laboratory Port Hueneme California since September 1962. From 1937 to 1962 he was chemist metallurgist supervisory physical metallurgist and supervisory aeronautical materials research engineer Metallurgy Division National Bureau of Standards. Mr. Reinhart has written many papers that have been published in the technical literature and is the author of one technical publication ASTM STP290 “Twenty-Year Atmospheric Corrosion Investigation of Zinc-Coated and Uncoated Wire and Wire Products. He is a member of ASM and was Chairman of the Washington Chapter 1951-52 a member of ASTM with membership on Committees A-5
A-10 and B-3 and was Chairman of Subcommittee XV of A-5 from 1952 to 1962 a member of NACE and was Chairman of the Editorial Review Subcommittee of the Publications Committee f
Fully π-conjugated ladder polymers with a spiral geometry represent a new class of helical polymers with great potential for organic nanodevices, but there is no precedent for an optically active helical ladder polym...
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Fully π-conjugated ladder polymers with a spiral geometry represent a new class of helical polymers with great potential for organic nanodevices, but there is no precedent for an optically active helical ladder polymer totally composed of achiral units. We now report the defect-free synthesis and resolution of a fully π-conjugated helical ladder polymer with a rigid helical cavity, which has been achieved by quantitative and chemoselective acid-promoted alkyne benzannulations of a rationally designed, random-coil achiral polymer followed by chromatographic enantioseparation. Because of a sufficiently high helix-inversion barrier, the isolated excess one-handed helical ladder polymer with a degree of polymerization of more than 15 showed a strong circular dichroism with a dissymmetry factor of up to 1.7×10 −2 and is thermally stable, maintaining its optical activity in solution even at 100 °C, as well-supported by molecular dynamics simulation.
Defect-free one-handed contracted helical tubular ladder polymers with a π-electron-rich cylindrical helical cavity were synthesized by alkyne benzannulations of the random-coil precursor polymers containing 6,6′-li...
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Defect-free one-handed contracted helical tubular ladder polymers with a π-electron-rich cylindrical helical cavity were synthesized by alkyne benzannulations of the random-coil precursor polymers containing 6,6′-linked-1,1′-spirobiindane-7,7′-diol-based chiral monomer units. The resulting tightly-twisted helical tubular ladder polymers showed remarkably high enantioseparation abilities toward a variety of chiral hydrophobic aromatics with point, axial, and planar chiralities. The random-coil precursor polymer and analogous rigid-rod extended helical ribbon-like ladder polymer with no internal helical cavity exhibited no resolution abilities. The molecular dynamics simulations suggested that the π-electron-rich cylindrical helical cavity formed in the tightly-twisted tubular helical ladder structures is of key importance for producing the highly-enantioseparation ability, by which chiral aromatics can be enantioselectively encapsulated by specific π-π and/or hydrophobic interactions.
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