摘要:
This invention is related to novel perylene diester derivatives represented by the general formula (I) or general formula (II) as described herein. The derivatives are useful in various applications, such as luminescent dyes for optical light collection systems, fluorescence-based solar collectors, fluorescence-activated displays, and/or single-molecule spectroscopy. The invention also relates to a luminescent medium, such as a luminescent film, that can significantly enhance the solar harvesting efficiency of thin film CdS/CdTe or CIGS solar cells. The luminescent medium comprises an optically transparent polymer matrix and at least one luminescent dye that comprises a perylene diester derivative. Over 16% of an efficiency enhancement to a CdS/CdTe solar cell and over 12% of an efficiency enhancement to a CIGS solar cell can be achieved.
摘要:
This invention is related to novel perylene diester derivatives represented by the general formula (I) or general formula (II) as described herein. The derivatives are useful in various applications, such as luminescent dyes for optical light collection systems, fluorescence-based solar collectors, fluorescence-activated displays, and/or single-molecule spectroscopy. The invention also relates to a luminescent medium, such as a luminescent film, that can significantly enhance the solar harvesting efficiency of thin film CdS/CdTe or CIGS solar cells. The luminescent medium comprises an optically transparent polymer matrix and at least one luminescent dye that comprises a perylene diester derivative. Over 16% of an efficiency enhancement to a CdS/CdTe solar cell and over 12% of an efficiency enhancement to a CIGS solar cell can be achieved.
摘要:
Described herein are wavelength conversion films which utilize photostable organic chromophores. In some embodiments, wavelength conversion films and chromophores exhibit improved photostability. In some embodiments, a wavelength conversion film comprising luminescent compounds is useful for improving the solar harvesting efficiency of solar cells, solar panels, or photovoltaic devices. In some embodiments, a wavelength conversion film comprising multiple luminescent compounds is useful for greenhouse roofs. Some embodiments provide an improved solar light wavelength profile for improved plant nutrition and/or growth.
摘要:
A piezoelectric sensor includes a ceramic material that has the formula of [Bi2O2][Am−1BmO3m+1], where m=2, A is mono-, di-, or tri-valent ions or a combination of them, B is transition element such as Fe3+, Ti4+, Nb5+, Ta5+, W6+, Mo6+ or a combination of them. The ceramics have high Curie temperature of 900˜940° C. The sensors claimed in the present invention utilize [Bi2O2][Am−1BmO3m+1] ceramics parts as sensing elements in various shapes and dimensions and can be used to sense force, acceleration, and pressure at very high temperatures of 600˜800° C.
摘要:
A silicone composition comprising (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R.sup.3.sub.2 R.sup.4 SiO.sub.1/2 units and SiO.sub.4/2 units wherein each R.sup.3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R.sup.4 is selected from the group consisting of R.sup.3 and alkenyl, the mole ratio of R.sup.3.sub.2 R.sup.4 SiO.sub.1/2 units to SiO.sub.4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition.
摘要:
Solventless silicone resins, which exhibit a high degree of reconstitution, are produced in forms such as powders and flakes. The degree of reconstitution is judged by the fact that silicone resin/fluid alloys produced therefrom exhibit only a minor shift in T.sub.g, the glass transition temperature, in comparison to analogous alloys produced from solvent dispersed (virgin) resin. Resin, and preferably virgin resin, is dispersed in a volatile liquid dispersant and blended with a nonvolatile silicone fluid. Thereafter, the volatile liquid dispersant is removed by means such as spray-drying or evaporation, resulting in the solventless resin forms of the invention.
摘要:
An additive to improve the hydrophobicity of a thermoplastic resin wherein the additive is at least 0.3 parts by weight of a thermoplastic silicone blend, said thermoplastic silicone blend having:(A) an organosilicone resin of the empirical formula(R.sub.3 Sio.sub.1/2)a (R.sub.2 SiO.sub.2/2)b (RSiO.sub.3/2)c( SiO.sub.4/2)dwherein: a and d are positive numerical values and b and c are zero or positive numerical values with the provisos that a+b+c+d=1, 0.ltoreq.(b+c).ltoreq.0.2 and the ratio of a:(b+c+d) is between about 0.3 and 1.0; and R is a monovalent radical independently selected from the group consisting of hydrogen, hydroxyl, alkyl, alkenyl, alkoxy, oximo, aryl, epoxide, carboxyl, ether, polyether, amide and alkyl amino radicals, which R groups may be the same or different, with the proviso that at least sixty mole percent of said R radicals are methyl; and(B) a predominantly linear silicone fluid having the empirical formula(R'.sub.3 SiO.sub.1/2)x (R'.sub.2 SiO.sub.2/2)y (R'SiO.sub.3/2)zwherein: x and y are positive numerical values and z is 0 or a positive numerical value with the provisos that x+y+z=1, y/(x+y+z).gtoreq.0.8; and R' is a monovalent radical independently selected from the group consisting of hydroxyl and alkyl radicals, which R' groups may be the same or different, with the proviso that at least sixty mole percent of said R' radicals are methyl;said organosilicone resin (A) and said predominantly linear silicone fluid (B) being present in relative amounts such that said blends have a dynamic shear modulus (G*), measured at a frequency of 10 radians/sec, of at least 5.times.10.sup.7 dyne/cm.sup.2 at temperatures less than said predetermined maximum storage temperature.
摘要翻译:一种用于改善热塑性树脂的疏水性的添加剂,其中所述添加剂为至少0.3重量份的热塑性硅氧烷共混物,所述热塑性硅氧烷共混物具有:(A)经验式(R3Si1 / 2)a的有机硅氧烷树脂(R2SiO2 / 2)b(RSiO3 / 2)c(SiO4 / 2)d其中a和d为正数值,b和c为零或正数值,条件是a + b + c + d = /=(b+c)=0.2,a:(b + c + d)的比例在约0.3和1.0之间; 并且R是独立地选自氢,羟基,烷基,烯基,烷氧基,肟基,芳基,环氧化物,羧基,醚,聚醚,酰胺和烷基氨基的一价基团,R基团可以相同或不同 ,条件是至少60摩尔%的所述R自由基是甲基; 和(B)具有经验式(R'3SiO1 / 2)x(R'2SiO2 / 2)y(R'SiO3 / 2)z的主要线性硅氧烷流体,其中x和y是正数值,z是0或 正数值,条件是x + y + z = 1,y /(x + y + z)> = 0.8; 并且R'是独立地选自羟基和烷基的一价基团,R'基团可以相同或不同,条件是至少60摩尔%的所述R'基团是甲基; 所述有机硅氧烷树脂(A)和所述主要线性硅氧烷流体(B)以相对的量存在,使得所述共混物的动态剪切模量(G *)以10弧度/秒的频率测量为至少5×10 7达因/ cm2,在低于所述预定最大存储温度的温度下。
摘要:
A method of obtaining fine-grained, free-flowing powdered silicone resins is disclosed. The powdered silicone resins contain very low or no residual aromatic solvents or other volatile organic compounds. The method includes the steps of (1) preparing a solution of an MQ silicone resin dissolved in a volatile liquid organosilicon solvent, such as hexamethyldisiloxane, and (2) spray-drying the solution obtained in step (1) to produce the silicone resin powder.
摘要:
Solventless, thermoplastic silicone pellets are prepared blending silicone resins (A) of the MQ-type and with predominantly linear silicone fluids (B), such as polydimethylsiloxane liquids and gums, to substantially homogeneity. The blends are heated to a predetermined compression-forming temperature, compression-formed to a densified mass and shaped into a pellet form. The composition of the pellets is balanced such that the pellets exhibit plastic flow at the predetermined compression-forming temperature and resist agglomeration at temperatures at or below a predetermined maximum storage temperature.
摘要:
a piezoelectric sensor includes a ceramic material that has the formula of [Bi2O2][Am−1BmO3m+1], where m=2, A is mono-, di-, or tri-valent ions or a combination of them, B is transition element such as Fe3+, Ti4+, Nb5+, Ta5+, W6+, Mo6+ or a combination of them. The ceramics have high Curie temperature of 900˜940° C. The sensors claimed in the present invention utilize [Bi2O2][Am−1BmO3m+1] ceramics parts as sensing elements in various shapes and dimensions and can be used to sense force, acceleration, and pressure at very high temperatures of 600˜800° C.
摘要翻译:一种压电传感器包括具有以下结构的陶瓷材料:[Bi 2 O 2 O 2] [A m-1] B‾···· 其中m = 2,A是一价,二价或三价离子或它们的组合,B是过渡元素,例如Fe, 3+,4+,5+,5%,5%,5%,5%,5% ,Mo 6+或它们的组合。 陶瓷具有高的居里温度为900〜940℃。本发明要求保护的传感器利用[Bi 2 N 2 O] [A m-1] 陶瓷部件作为各种形状和尺寸的传感元件,可用于在非常高的温度下感测力,加速度和压力 600〜800℃