Abstract:
The disclosure relates to a method of aligning a set of patterns on a substrate, which includes depositing on the substrate's surface a set of silicon nanoparticles, which includes a set of ligand molecules including a set of carbon atoms. The method involves forming a first set of regions where the nanoparticles are deposited, while the remaining portions of the substrate surface define a second set of regions. The method also includes densifying the set of nanoparticles into a thin film to form a set of silicon-organic zones on the substrate's surface, wherein the first and the second set of regions have respectively first and second reflectivity values, such that the ratio of the second reflectivity value to the first reflectivity value is greater than about 1.1.
Abstract:
Native Group IV semiconductor thin films formed from coating substrates using formulations of Group IV nanoparticles are described. Such native Group IV semiconductor thin films leverage the vast historical knowledge of Group IV semiconductor materials and at the same time exploit the advantages of Group IV semiconductor nanoparticles for producing novel thin films which may be readily integrated into a number of devices.
Abstract:
A method of forming a multi-doped junction on a substrate is disclosed. The method includes providing the substrate doped with boron atoms, the substrate comprising a front crystalline substrate surface; and forming a mask on the front crystalline substrate surface, the mask comprising exposed mask areas and non-exposed mask areas. The method also includes exposing the mask to an etchant, wherein porous silicon is formed on the front crystalline substrate surface defined by the exposed mask areas; and removing the mask. The method further includes exposing the substrate to a dopant source in a diffusion furnace with a deposition ambient, the deposition ambient comprising POCl3 gas, at a first temperature and for a first time period, wherein a PSG layer is formed on the front substrate surface; and heating the substrate in a drive-in ambient to a second temperature and for a second time period. Wherein a first diffused region with a first sheet resistance is formed under the porous silicon and a second diffused region with a second sheet resistance is formed under the front crystalline substrate surface without the porous silicon, and wherein the first sheet resistance is substantially smaller than the second sheet resistance.
Abstract:
A method of forming a diffusion region is disclosed. The method includes depositing a nanoparticle ink on a surface of a wafer to form a non-densified thin film, the nanoparticle ink having set of nanoparticles, wherein at least some nanoparticles of the set of nanoparticles include dopant atoms therein. The method also includes heating the non-densified thin film to a first temperature and for a first time period to remove a solvent from the deposited nanoparticle ink; and heating the non-densified thin film to a second temperature and for a second time period to form a densified thin film, wherein at least some of the dopant atoms diffuse into the wafer to form the diffusion region.
Abstract:
A device for generating electricity from solar radiation is disclosed. The device includes a substrate; an insulating layer formed above the substrate; and a first electrode formed above the insulating layer. The device also includes a first doped Group IV nanoparticle thin film deposited on the first electrode; and a second doped Group IV nanoparticle thin film deposited on the first doped Group IV nanoparticle thin film. The device further includes a third doped Group IV nanoparticle thin film deposited on the second doped Group IV nanoparticle thin film; a fourth doped Group IV nanoparticle thin film deposited on the third doped Group IV nanoparticle thin film; and, a second electrode formed on the fourth doped Group IV nanoparticle thin film. Wherein, when solar radiation is applied to the fourth doped Group IV nanoparticle thin film, an electrical current is produced.
Abstract:
An OLED application such as a light source is disclosed which has OLED elements utilizing an active EL (electro-luminescent) layer comprised of two elements, a host element emitting in a first spectrum and a dopant element emitting in a second spectrum different from the first. The OLED device also has a luminescent material disposed on the substrate or transparent electrode which converts the emission spectrum of light from the active EL layer.
Abstract:
An organic OLED having a cathode formed from a first conducting layer, an electroluminescent layer including an oxadiazole compound, and an anode constructed from a second conducting layer which is transparent to light generated by the electroluminescent layer. In one embodiment, an electron transport layer is sandwiched between the anode and electroluminescent layers. Other embodiments utilize a hole transport layer between the electroluminescent layer and the anode either with or without the electron transport layer. In one embodiment, the anode is constructed from a layer of indium tin oxide and a layer of a hole transport material that bonds to indium tin oxide and which has an energy band intermediate between that of indium tin oxide and that of the hole transport layer.
Abstract:
An organic electroluminescent device that comprises a substrate, a first conductive layer on the substrate, an electron-transporting and light-emitting layer, a second conductive layer adjacent the electron-transporting and light-emitting layer and remote from the first conductive layer, and a hole-conducting layer sandwiched between the first conductive layer and the electron-transporting and light-emitting layer. The hole-conducting layer comprises a poly(arylamine) including at least one compound of formula (I): ##STR1## In this: R is independently in each occurrence a C.sub.1-24 hydrocarbyl, hydrocarboxyl, hydrothiocarboxy, hydroarylcarboxy, or hydrothioarylcarboxy; Ar.sub.1 and Ar.sub.2 are independently in each occurrence a C.sub.6-18 aryl moiety optionally substituted with one or more C.sub.1-24 hydrocarbyl, hydrocarboxyl, hydrothiocarboxy, hydroarycarboxy, or hydrothioarylcarboxy; A is independently in each occurrence hydrogen or a halogen; x is independently in each occurrence a positive number between 0 and 1; n is a whole number from 0 to 4; and m is a number from about 5 to about 1000.