摘要:
There is disclosed methods of making photosensitive devices, such as flexible photovoltaic (PV) devices, through the use of epitaxial liftoff. Also described herein are methods of preparing flexible PV devices comprising a structure having a growth substrate, wherein the selective etching of protective layers yields a smooth growth substrate that us suitable for reuse.
摘要:
There is disclosed methods of making photosensitive devices, such as flexible photovoltaic (PV) devices, through the use of epitaxial liftoff. Also described herein are methods of preparing flexible PV devices comprising a structure having a growth substrate, wherein the selective etching of protective layers yields a smooth growth substrate that us suitable for reuse.
摘要:
There is disclosed a growth structure comprising a growth substrate, a sacrificial layer, a buffer layer, at least three substrate protective layers, at least one epilayer, at least one contact, and a metal or alloy-coated host substrate. In one embodiment, the device further comprises at least three device structure protecting layers. The sacrificial layer may be positioned between the growth substrate and the at least one epilayer, wherein the at least three substrate protective layers are positioned between the growth substrate and the sacrificial layer, and the at least three device structure protecting layers are positioned between the sacrificial layer and the epilayer. There is also disclosed a method of preserving the integrity of a growth substrate by releasing the cell structure by etching the sacrificial layer and the protective layers.
摘要:
A device comprises a plurality of fence layers of a semiconductor material and a plurality of alternating layers of quantum dots of a second semiconductor material embedded between and in direct contact with a third semiconductor material disposed in a stack between a p-type and n-type semiconductor material. Each quantum dot of the second semiconductor material and the third semiconductor material form a heterojunction having a type II band alignment. A method for fabricating such a device is also provided.
摘要:
A device comprises a plurality of fence layers of a semiconductor material and a plurality of alternating layers of quantum dots of a second semiconductor material embedded between and in direct contact with a third semiconductor material disposed in a stack between a p-type and n-type semiconductor material. Each quantum dot of the second semiconductor material and the third semiconductor material form a heterojunction having a type II band alignment. A method for fabricating such a device is also provided.
摘要:
An asymmetric twin waveguide (ATG) structure with an integrated amplifier and detector fabricated in a single active waveguide layer is disclosed. The structure comprises an active waveguide layer formed on a passive waveguide layer. The active and passive waveguides have different effective indices of refraction such that a first mode of light is confined primarily to the active waveguide and a second mode of light is confined primarily to the passive waveguide in the area where the waveguides overlap.
摘要:
Coordinating additives are included in porphyrinoid-based materials to promote intermolecular organization and improve one or more photoelectric characteristics of the materials. The coordinating additives are selected from fullerene compounds and organic compounds having free electron pairs. Combinations of different coordinating additives can be used to tailor the characteristic properties of such porphyrinoid-based materials, including porphyrin oligomers. Bidentate ligands are one type of coordinating additive that can form coordination bonds with a central metal ion of two different porphyrinoid compounds to promote porphyrinoid alignment and/or pi-stacking. The coordinating additives can shift the absorption spectrum of a photoactive material toward higher wavelengths, increase the external quantum efficiency of the material, or both.
摘要:
Coordinating additives are included in porphyrinoid-based materials to promote intermolecular organization and improve one or more photoelectric characteristics of the materials. The coordinating additives are selected from fullerene compounds and organic compounds having free electron pairs. Combinations of different coordinating additives can be used to tailor the characteristic properties of such porphyrinoid-based materials, including porphyrin oligomers. Bidentate ligands are one type of coordinating additive that can form coordination bonds with a central metal ion of two different porphyrinoid compounds to promote porphyrinoid alignment and/or pi-stacking. The coordinating additives can shift the absorption spectrum of a photoactive material toward higher wavelengths, increase the external quantum efficiency of the material, or both.
摘要:
A method is provided. A first layer is provided over a substrate, the first layer comprising a first material. A patterned second layer is applied over the first layer via stamping. The second layer comprising a second material. The second layer covers a first portion of the first layer, and does not cover a second portion of the first layer. The second portion of the first layer is removed via a subtractive process while the first portion of the first layer is protected from removal by the patterned second layer.
摘要:
Top-gate, bottom-contact organic thin film transistors are provided. The transistors may include metal bilayer electrodes to aid in charge movement within the device. In an embodiment, an organic transistor includes a drain electrode and a source electrode disposed over a first region of a substrate, a transition metal oxide layer disposed over and in direct physical contact with the drain electrode and the source electrode, an organic preferentially hole conducting channel layer disposed over the metal oxide and between the drain electrode and the source electrode, and a gate electrode disposed over the channel.