Light-emitting device with II-VI compounds
US5274248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1992 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Jun 3, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/812
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
The present invention provides a p-n junction type blue luminescence device forming a p-type hole injection layer and having high light-emission efficiency. On an n-conduction type ZnS substrate 111, there is formed a multiquantum well structure 112 alternately laminating a p-type ZnTe layer 112a and a non-doped ZnS layer 112b. And, a positive electrode 113 and a negative electrode 114 are provided on the multiquantum well structure 112 and the ZnS crystal, respectively. By applying forward bias voltage on this light-emitting device, electrons are injected from the n-type ZnS substrate to the multiquantum well structure 112. Then, these electrons are recombined with holes in the multiquantum well structure 112, so as to emit blue luminescence light. Thus, it becomes possible to easily and reproducibly obtain a p-conduction type hole injection layer so as to realize highly concentrated carrier injection and obtain high efficiency in emitting blue luminescence light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.