What are the optical properties of silicon?
What are the optical properties of silicon?
Optical properties
| Remarks | ||
|---|---|---|
| Infrared refractive index n(λ) | n = 3.42 | 300K |
| n = 3.38(1 + 3.9·10-5·T) | 77K < T < 400 K | |
| Radiative recombination coefficient | 1.1 x 10-14 cm3 s-1 | 300 K |
| Optical photon energy | 63 meV | 300 K |
What are the properties of crystalline silicon?
Monocrystalline silicon (mono c-Si) is a form in which the crystal structure is homogeneous throughout the material; the orientation, lattice parameter, and electronic properties are constant throughout the material.
Why is silicon not efficient in optical applications?
The band gap of silicon is also larger than desirable, making it impossible to detect light in the telecom spectral regions around 1.5 and 1.3 μm. Silicon has no χ(2) nonlinearity, making it impossible to realize electro-optic modulators with this material.
What wavelength absorbs silicon?
Silicon film thickness increases from 10 nm to 200 nm with 10 nm increment as indicated beside each device. Devices with silicon film thickness between 110 nm and 140 nm can completely absorb light in wavelength range of 500 nm-700 nm.
What is the hardness of silicon?
Hardnesses of the elements (data page)
| number | symbol | Mohs hardness |
|---|---|---|
| 11 | Na | 0.5 |
| 12 | Mg | 2.5 |
| 13 | Al | 2.75 |
| 14 | Si | 6.5 |
What is the refractive index of silicon?
Some representative refractive indices
| Name of material | λ (nm) | Refractive index no. n |
|---|---|---|
| Silicon | 1200 – 8500 | 3.42–3.48 |
| Gallium(III) phosphide | 3.5 | |
| Gallium(III) arsenide | 3.927 | |
| Germanium | 3000 – 16000 | 4.05–4.1 |
What is crystalline silicon photovoltaic modules?
Crystalline silicon photovoltaics are modules built using crystalline silicon solar cells (c-Si), developed from the microelectronics technology industry. Crystalline silicon solar cells have high efficiency, making crystalline silicon photovoltaics an interesting technology where space is at a premium.
What’s the difference between thin film and crystalline silicon solar panels?
Thin film modules are primarily composed of a rare metal called tellurium that can absorb solar rays better than silicon crystalline modules, which is a factor in the price gap between the two technologies. …
What are the benefits of using silicon devices for such optical applications?
Silicon photonics combines the cost-effectiveness of CMOS manufacturing processes and packaging technologies with the benefits of optical communications such as high speed, low latency, and wide bandwidth, and is the only technology available that meets those requirements.
What makes Si material useful in optical electronics?
Silicon is used for electronic devices because it is an element with very special properties. One of it’s most important properties is that it is a semiconductor. This means that it conducts electricity under some conditions and acts as an insulator under others.
Does silicon absorb UV light?
It has been shown that silicon nanoparticles are sensitive to UV light in a wavelength range around ~200 nm. UV light is absorbed and re-emitted at wavelengths in the visible range depending on the size of the nanoparticles.
What is the weakness of silicon?
Drawbacks or disadvantages of Silicon (Si) ➨It needs thick layer (crystalline). ➨It is expensive to produce Silicon (Si) crystals. ➨It has short life cycles. ➨Toxic substances are produced and are used in manufacturing.
