Blade-coating, a prototype tool for slot-die coating is a promising technique showing high compatibility with large-area roll-to-roll coating. Here, a high-performance PM6:Y6-based device is fabricated with chlorobenzene (CB) through a novel binary solvent additive (1-chloronaphthalene (CN):diphenyl ether (DPE)). It can be found that the binary solvent additive can improve the crystallinity of the acceptor and forms a better phase separation domain, which would promote the effective separation of charge and inhibit charge recombination. As a result, high power conversion efficiency (PCE) of 15.77% can be achieved with the spin-coating method, which is similar to the best organic solar cells (OSCs) processed with chloroform (CF) solution. Moreover, a blade-coated OSC is also processed with CB and demonstrates a promising PCE of 11.69% with large-area device (1.2 cm 2 ). These results are critical for the large-scale production of highly efficient OSCs.

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The dispersion effect of five cyclodextrins (CDs) on carbon nanotubes (CNTs) was studied. 2-HB-b-CD is the most efficient dispersing agent. The dispersing ability of CDs on the dispersion of CNTs was 2-The movement in the FTIR spectra of the asymmetric and symmetric stretching vibrations of O-H of the composites means hydrogen bonding was an important factor on the dispersing ability. These results indicate that the type of interaction might be a combination of a weak interaction similar to a van der Waals type and hydrogen bonding mechanism.

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Functionally graded thermoelectric material (TE FGM) is one of main research direction in research field of thermoelectric (TE) materials all over world. A lot of research work on TE FGM has been done to improve the conversion efficiency of TE. Here the development of TE FGM in recent years is discussed in the aspects of the model design, the materials selection, the barrier or joining choice and the device fabrication.