Active solid-state devices (e.g. – transistors – solid-state diode – Thin active physical layer which is – Heterojunction
Patent
1992-06-03
1993-12-28
Mintel, William
Active solid-state devices (e.g., transistors, solid-state diode
Thin active physical layer which is
Heterojunction
257103, 257 96, 257 97, 257 94, H01L 3300
Patent
active
052742482
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.
REFERENCES:
patent: 4868615 (1989-09-01), Kamata
patent: 5081632 (1992-01-01), Migita et al.
patent: 5103269 (1992-04-01), Tomomura et al.
patent: 5140385 (1992-08-01), Kukimoto et al.
"P-type conduction in ZnSe grown by temperature difference method under controlled vapor pressure" by Jun-ichi Nishizawa et al; Journal of Applied Physics, vol. 59, No. 6; Mar. 15, 1986; pp. 2256-2258.
"Nitrogen-doped p-type ZnSe films grown by movpe" by Akira Ohki et al; Journal of Crystal Growth, vol. 93; 1988; pp., 692-696.
"Metalorganic vapor phase epitaxy of low-resistivity p-type ZnSe" by T. Yasuda et al; Applied Physics Letters, vol. 52, No. 1; Jan. 4, 1988; pp. 57-59.
Kubo Minoru
Narusawa Tadashi
Yokogawa Toshiya
Matsushita Electric - Industrial Co., Ltd.
Mintel William
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