Meijo UniversityArtifacts Donated to the Nobel Museum
MIS-type Blue LED
| Quantity |
1 |
|---|
| Description |
MIS-type blue LED invented by Isamu Akasaki in 1978, emitting the brightest blue light at that time in the world |
|---|
| Materials |
GaN semiconductor, epoxy resin, and electric source |
|---|
| Size |
W5mm×D5mm×H20mm |
|---|
High -quality GaN Wafer
| Quantity |
1 |
|---|
| Description |
This device shows the low-temperature-deposited (LT) buffer to understand the basic technology of blue LED. LT buffer can be compared with non-LT buffer. |
|---|
| Materials |
Aluminum case, acrylic case, sapphire surface |
|---|
| Size |
W240mm×D240mm×H135mm |
|---|
| Annotated plate |
Schematic view of cross-sectional sample structure
By pioneering the low-temperature-deposited (LT) buffer layer technology with Metalorganic Vapor Phase Epitaxy, a high-quality GaN layer with a specular surface has been obtained, despite huge lattice mismatch of about 16.3% between GaN and sapphire. |
|---|
GaN p-n junction Blue LED Wafer and simplified luminescent device
| Quantity |
1 |
|---|
| Description |
This device is Blue LED wafer. Blue LED is fabricated by growing GaN semiconductor crystals on sapphire surface. It contains electric source. By passing an electric current through this device the wafer emits blue light. |
|---|
| Materials |
Aluminum case, acrylic case, sapphire surface, direct-current power source, power cable |
|---|
| Size |
W240mm×D240mm×H130mm |
|---|
| Annotated plate |
Schematic view of cross-sectional sample structure
This is GaN p-n junction blue LED wafer, which was made on high-quality GaN with low-temperature-deposited (LT) buffer. Blue emission from mirror-smooth GanN crystals can be seen. |
|---|
Device for understanding three primary colors of light
| Quantity |
1 |
|---|
| Description |
This device is for understanding three primary colors of light. It demonstrates that red, blue, and green LEDs together can turn into any color. |
|---|
| Materials |
Aluminum case, acrylic case, sapphire surface, direct-current power source, power cable |
|---|
| Size |
W240mm×D240mm×H130mm |
|---|
| Annotated plate |
Three primary colors of light
Blue, green, and red are the three primary colors of light. Red and green LEDs had been around for a long time, but there was no prospect of blue light. Accordingly, while lamps could not been created. Isamu Akasaki Hiroshi Amano, and Shuji Nakamura invented the bright blue light beams using GaN-based semiconductors from the late 1980s to the early 1990s. |
|---|
Device for understanding the principles of white LEDS
| Quantity |
1 |
|---|
| Description |
This device helps understand how white LED is generated. The light from blue LED emits yellow phosphor, and white light is generated by mixing the blue light with the down-converted yellow light. |
|---|
| Materials |
Aluminum case, acrylic case, blue-LED, yellow phosphor surface, direct-current power source, power cable |
|---|
| Size |
W240mm×D240mm×H130mm |
|---|
| Annotated plate |
A principle model of common white LED
Most white LEDs are blue LEDs coated with yellow phosphor. The white-light is generated by mixing the blue light with the down-converted yellow light. |
|---|
