To date, many efforts have been made to improve the performance of paintable carbon-based （PC-based） perovskite solar cells （PSCs）. Though great progress has been achieved, their power conversion efficiencies are ...To date, many efforts have been made to improve the performance of paintable carbon-based （PC-based） perovskite solar cells （PSCs）. Though great progress has been achieved, their power conversion efficiencies are still relatively low compared with hole-transport-materials-based PSCs. General research on influencing factors of performance in PC-based PSCs is still insufficient. In this work, PC-based PSCs were fabricated in ambient air and four groups of controlled experi- ments were performed in which the PbI2 layers were prepared with or without antisolvent extraction treatment. These four groups of experiments were designed to find out the effect of different influencing factors on PC-based PSCs performance, for example, PbI2 residual, the surface morphology of the perovskite film, the surface roughness of the perovskite film, and the contact status of the perovskite/carbon electrode interface. With a systematic analysis, we demonstrated that the contact status of the perovskite/carbon electrode interface played a vital role in PC-based PSCs, and a fiat, smooth perovskite surface could help to improve this contact status significantly. Besides, on the precondition of a poor contact interface, no PbI2 residual and a good surface morphology only brought limited benefits to the performances of PC-based PSCs.展开更多
Dynamic photoprogramming of paintable liquid crystal photonic devices with multi-stability shows practical application in smart soft materials and responsive optics.However,there exist three key challenges that limit ...Dynamic photoprogramming of paintable liquid crystal photonic devices with multi-stability shows practical application in smart soft materials and responsive optics.However,there exist three key challenges that limit their development:achieving precise paintability with controllable viscosity and resolution,maintaining well-ordered liquid crystal photonic structures,and enabling multi-stable photoresponsive behavior.Here,we address these limitations by incorporating an intrinsic photoswitch into a cellulose-based liquid crystal system,further constructing a unique paintable helical photonic architecture featuring both multi-stability and dynamic light-actuation.The intrinsic chiral photoswitch enables multi-stable modulation of helical pitch,while optimized viscosity restrains the remarkable fluidity of traditional liquid crystal systems and matches proper surface anchoring,thereby allowing for paintability and programming of a photonic device.The cutting-edge single-step painting enables highly efficient,large-area and welldefined patterning of helical architectures on diverse flexible substrates,thereby promoting prospective applications in anti-counterfeiting,information encryption,and smart window-film.This strategy establishes a robust and versatile foundation that integrates practical explorations in soft matter photonics with state-of-the-art engineering applications,such as multifunctional interactive optical information systems and advanced intelligent flexible sensors.展开更多
A novel organosilane, N-n-butyl-γ-aminopropylmethyldimethoxysilane was synthesized through aminization reaction and the chemical structure of resulting products was characterized by 1HNMR, 13CNMR, FT-IR and elemental...A novel organosilane, N-n-butyl-γ-aminopropylmethyldimethoxysilane was synthesized through aminization reaction and the chemical structure of resulting products was characterized by 1HNMR, 13CNMR, FT-IR and elemental analysis. The results of test on probation for this organosilane proved that it was effective to modify surface-paintability of organosiloxane sealants.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.51702245)the Fundamental Research Funds for the Central Universities,China(Grant No.WUT:2017IB013)
文摘To date, many efforts have been made to improve the performance of paintable carbon-based （PC-based） perovskite solar cells （PSCs）. Though great progress has been achieved, their power conversion efficiencies are still relatively low compared with hole-transport-materials-based PSCs. General research on influencing factors of performance in PC-based PSCs is still insufficient. In this work, PC-based PSCs were fabricated in ambient air and four groups of controlled experi- ments were performed in which the PbI2 layers were prepared with or without antisolvent extraction treatment. These four groups of experiments were designed to find out the effect of different influencing factors on PC-based PSCs performance, for example, PbI2 residual, the surface morphology of the perovskite film, the surface roughness of the perovskite film, and the contact status of the perovskite/carbon electrode interface. With a systematic analysis, we demonstrated that the contact status of the perovskite/carbon electrode interface played a vital role in PC-based PSCs, and a fiat, smooth perovskite surface could help to improve this contact status significantly. Besides, on the precondition of a poor contact interface, no PbI2 residual and a good surface morphology only brought limited benefits to the performances of PC-based PSCs.
基金supported by National Key Research and Development Program of China(2022YFA1203700)Basic Science Center of National Natural Science Foundation(T2488302)+5 种基金National Natural Science Foundation of China(22305079,2233000296,92356301,22338006,61822504,22108076,62275081 and 62505085)Innovation Program of Shanghai Municipal Education Commission,Scientific Committee of Shanghai(15XD1501400 and 2021-01-07-00-02-E00107)Shanghai Municipal Science and Technology Major Project(21JC1401700)“Shuguang Program”of Shanghai Education Development Foundation and Shanghai Municipal Education Commission(21SG29)Fellowship of China National Postdoctoral Program for Innovative Talents(BX20230125)Chenguang Program of Shanghai Education Development Foundation and Shanghai Municipal Education Commission(24CGA29),Shanghai Sailing Program(23YF1409000,24YF2709100),Postdoctoral Fellowship Program of CPSF(GZB20240218).
文摘Dynamic photoprogramming of paintable liquid crystal photonic devices with multi-stability shows practical application in smart soft materials and responsive optics.However,there exist three key challenges that limit their development:achieving precise paintability with controllable viscosity and resolution,maintaining well-ordered liquid crystal photonic structures,and enabling multi-stable photoresponsive behavior.Here,we address these limitations by incorporating an intrinsic photoswitch into a cellulose-based liquid crystal system,further constructing a unique paintable helical photonic architecture featuring both multi-stability and dynamic light-actuation.The intrinsic chiral photoswitch enables multi-stable modulation of helical pitch,while optimized viscosity restrains the remarkable fluidity of traditional liquid crystal systems and matches proper surface anchoring,thereby allowing for paintability and programming of a photonic device.The cutting-edge single-step painting enables highly efficient,large-area and welldefined patterning of helical architectures on diverse flexible substrates,thereby promoting prospective applications in anti-counterfeiting,information encryption,and smart window-film.This strategy establishes a robust and versatile foundation that integrates practical explorations in soft matter photonics with state-of-the-art engineering applications,such as multifunctional interactive optical information systems and advanced intelligent flexible sensors.
基金This work was supported by the National Advanced Materials Committee of China(grant 2003AA327030)the National Science Funds for Distinguished Young Scholars(grant 50125312) Key Program of the National Natural Science Foundaion of China(grant 50133020)
文摘A novel organosilane, N-n-butyl-γ-aminopropylmethyldimethoxysilane was synthesized through aminization reaction and the chemical structure of resulting products was characterized by 1HNMR, 13CNMR, FT-IR and elemental analysis. The results of test on probation for this organosilane proved that it was effective to modify surface-paintability of organosiloxane sealants.
