Optoelectronic semiconductor devices
First Claim
1. An optoelectronic semiconductor device comprising a junction formed, at least in part, from a layer of indirect band gap semiconductor material, wherein said layer includes a photoactive region in which, in operation of the device, electron-hole pairs are either created or combined, said photoactive region containing a direct band gap semiconductor material, being separate from said junction and defining an energy gap equal to or smaller than the energy gap of the indirect band gap semiconductor material.
1 Assignment
0 Petitions
Accused Products
Abstract
An optoelectronic semiconductor device in the form of an LED comprises a silicon p-n junction having a photoactive region containing beta-iron disilicide (β-FeSi2). The LED produces electroluminescence at a wavelength of about 1.5 μm. Photodetector devices are also described
38 Citations
46 Claims
- 1. An optoelectronic semiconductor device comprising a junction formed, at least in part, from a layer of indirect band gap semiconductor material, wherein said layer includes a photoactive region in which, in operation of the device, electron-hole pairs are either created or combined, said photoactive region containing a direct band gap semiconductor material, being separate from said junction and defining an energy gap equal to or smaller than the energy gap of the indirect band gap semiconductor material.
- 43. A method for producing an optoelectronic semiconductor device including a junction, the method including the steps of, forming a layer of an indirect band gap semiconductor material defining part of said junction, and providing in said layer a photoactive region, containing a direct band gap semiconductor material which has an energy gap equal to or smaller than that of the indirect band gap semiconductor material, wherein the said photoactive region is separate from said junction and during operation of the device, electron-hole pairs are either created or combined in said photoactive region.
Specification