摘要:
Photovoltaic cells are fabricated in which the compositions of the light-absorbing layer and the electron-accepting layer are selected such that at least one side of the junction between these two layers is substantially depleted of charge carriers, i.e., both free electrons and free holes, in the absence of solar illumination. In further aspects of the invention, the light-absorbing layer is comprised of dual-shell passivated quantum dots, each having a quantum dot core with surface anions, an inner shell containing cations to passivate the core surface anions, and an outer shell to passivate the inner shell anions and anions on the core surface.
摘要:
Provided is an aerosol method for preparing powdered products of a variety of materials involving generating a flowing aerosol in an aerosol generator (106) and conducting the flowing aerosol through a furnace (110) to heat the flowing aerosol to form particles, with controlled flow of the flowing aerosol through the heater (110). The particles may be cooled in a particle cooler (320) and then collected in a particle collector (114).
摘要:
The invention relates to phosphor powders and a method for making phosphor powders. The powders are oxygen-containing, such as metal oxides, borates or titanates and have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention advantageously permits the continuous production of such powders. The invention also relates to improved devices, such as display devices, incorporating those shown by the figure, incorporating the phosphor powders.
摘要:
Present invention provides a process for the synthesis of size and composition tunable colloidal PbMgS core and PbMgS/MS core shell quantum dots emitting in the near infrared (NIR) region of the spectrum in a single operation in a continuous flow reactor. M includes at least one of Cd, Mg, Zn and Cu metals.
摘要:
Phosphors based on transition metal-activated gallates, particularly Cr3+- and Ni2+-activated zinc germanium gallates, are disclosed herein. In some embodiments such phosphors can exhibit persistent infrared phosphorescence for as long as 400 hours. Such phosphors can be used, for example, as components of a luminescent paint.
摘要:
Glass powders and methods for producing glass powders. The powders preferably have a small particle size, narrow size distribution and a spherical morphology. The method includes forming the particles by a spray pyrolysis technique. The invention also includes novel devices and products formed from the glass powders.
摘要:
New oxide phosphors based on doped gallium oxides, alkaline earth gallates and germanates for electroluminescent display materials. Bright orange red electroluminescence has been obtained in amorphous and crystalline oxides Ga2O3:Eu for the first time. SrGa2O4 and SrGa4O9 doped with 1-8 mole % of Eu and Tb, CaGa2O4, Ca3Ga2O6 and CaGa4O7 doped with 1-4 mole % of Eu, Tb, Pr and Dy, BaGa2O4 doped with 1-2 mole % of Eu and Tb, have been prepared using RF magnetron sputtering onto ceramic dielectric substrates and annealed at 600 DEG C - 950 DEG C in air or Ar for 1-2 hours. Bright electroluminescent (EL) emission was obtained with wavelengths covering the visible sprectrum from 400 to 700 nm, and infrared emission above 700 nm with spectral peaks characteristic of rare earth transitions. The films of CaGa2O4 with 1 mole % Eu achieved 22 fL (75 cd/m ) at 60 Hz and had a maximum efficiency of 0.2 lm/w for red emission. An amorphous thin film of Ca3Ga2O6 with 2 mole % Eu achieved 34 fL in red EL at 60 Hz when annealed at 600 DEG C. SrGa2O4 with 1 mole % Eu and 4 mole % Tb yielded "white" phosphor having red, green and blue emission (13 fL at 60 Hz), and SrGa2O4 with 8 mole % Tb resulted in a blue and green phosphor measuring 30 fL at 60 Hz. Zn2Si0.5Ge0.5O4 containing Mn was sputtered using magnetron RF sputtering onto ceramic dielectric substrates and annealed at 700 DEG C for 1 hour in air or argon. Bright green (540 nm) emission was obtained in electroluminescence: 110 fL (377 cd/m ) at 60 Hz with a maximum efficiency of 0.9 l/w. Moderately bright red emission (640 nm) was also obtained.
摘要翻译:用于电致发光显示材料的基于掺杂的镓氧化物,碱土金属镓盐和锗酸盐的新型氧化物荧光体。 在无定形和结晶氧化物Ga2O3:Eu中首次获得了明亮的橙红色电致发光。 掺杂有1-8摩尔%Eu和Tb,CaGa2O4,Ca3Ga2O6和掺杂有1-4摩尔%的Eu,Tb,Pr和Dy的CaGa 4 O 7的SrGa 2 O 4和SrGa 4 O 9,掺杂有1-2摩尔%的Eu和Tb的BaGa 2 O 4具有 使用射频磁控溅射法制备在陶瓷电介质基片上,并在600℃〜950℃的空气或Ar中退火1-2小时。 获得了具有覆盖400至700nm的可见光束的波长和高于700nm的红外发射的具有稀土跃迁特征的光谱峰的亮电场发光(EL)发射。 具有1摩尔%Eu的CaGa 2 O 4膜在60Hz下实现了22fL(75cd / m 2),对于红色发射具有0.2lm / w的最大效率。 具有2摩尔%Eu的Ca 3 Ga 2 O 6的非晶薄膜在600℃退火时在60Hz的红色EL中达到34fL。具有1摩尔%Eu和4摩尔%Tb的SrGa 2 O 4产生具有红色,绿色和蓝色发射的“白色”荧光体 (13fL,60Hz)和具有8mol%Tb的SrGa 2 O 4产生在60Hz下测量30fL的蓝色和绿色荧光体。 将含Mn的Zn2Si0.5Ge0.5O4用磁控溅射溅射到陶瓷电介质基片上,在空气或氩气中于700℃退火1小时。 在60Hz的电致发光中获得了明亮的绿色(540nm)发光:110fL(377cd / m 2),最大效率为0.9l / w。 也获得了中等亮度的红色发射(640nm)。