Cadmium Selenide Wafers (CdSe)

university wafer substrates

What Single Crystal II-VI Substrates Can Be Used For Growth?

I am looking to purchase a variety of single crystal II-VI substrates to use a substrates for growth. I would like quotes for several different substrtes, which I've listed below:

  • CdSe, Ø 12.7×3.2 mm, <0001> // Ø 12.7, 2 sides polished 60/40, high resistivity (= 1011 Ohm×cm)
  • CdSe, 5×5×0.5 mm, (0001), all sides polished 60/40, high resistivity (= 1011 Ohm×cm)
  • CdSe, (0001), 10×10×0.5 mm, 2 sides polished 60/40, high resistivity (= 1011 Ohm×cm)

Reference #127670 for specs and pricing.

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Cadmium Selenide (CdS) SubstrateCdSe Substrate

Cadmium Selenide Wafers (CdSe) Cadmium Selenide (CdS) Wafers

We have inventory of CdS wafers in stock Both SSP and DSP available. Please let us know what specs we can quote for you?

Below are just some of what we have in stock.

  • CdS (0001) 5 mm X 5 mm x 0.5 mm , SSP
  • CdS (0001) 5 mm X 5 mm x 0.5 mm , DSP
  • CdS (0001) 5 mm x 5 mm x1.0 mm, Low resistivities: <1 ohm-cm, DSP(60/40)
  • CdS (0001) 10x10x0.5 mm, SSP R:10^3-10^5 ohm.cm
  • CdS (0001) 10x10x0.5 mm, DSP
  • CdS (0001), 10x10x1.0 mm, resistivities: <1 ohm-cm, DSP (60/40)
  • CdS (0001), N type, 10x10x1.0 mm, Resistivity: >1E6 ohm-cm, DSP
  • CdS Random orientation 5 mm X 5 mm x 1.0 mm , DSP
  • CdS Random orientation 10 mm X 10 mm x 1.0 mm , DSP
  • CdS (0001) N type, , 25.4 mm in dia x1.0 mm, High resistivities: >1E6ohm-cm, DSP (60/40)
  • CdS (0001) N type, , 38.1 mm in dia x1.0 mm, Low resistivities: <1 ohm-cm, DSP (60/40)

What Are Some Cadmium Selenide Applications?

Cadmium Selenide (CdSe) is a binary compound semiconductor with unique electronic and optical properties. Its applications are widespread in various fields due to its tunable bandgap, high photoluminescence efficiency, and excellent stability. Here are some key applications of CdSe substrates:

  1. Solar cells: CdSe is used as an efficient light-absorbing material in thin-film solar cells due to its optimal bandgap for solar energy conversion. It can be combined with other materials such as cadmium telluride (CdTe) or copper indium gallium selenide (CIGS) to improve the efficiency of photovoltaic devices.

  2. Light-emitting diodes (LEDs): Due to its direct bandgap and strong photoluminescence, CdSe is used in the production of LEDs. CdSe-based quantum dots, which are nanoscale semiconductor particles, can be employed in LEDs to generate a wide range of colors with high color purity.

  3. Photodetectors: CdSe-based photodetectors are utilized in a variety of applications, including imaging devices, optical communication systems, and environmental monitoring. Their high sensitivity to light and rapid response times make them suitable for these applications.

  4. Quantum dots: CdSe quantum dots have found widespread use in biological imaging, sensing, and drug delivery applications. They can be used as fluorescent markers in biological assays and microscopy, offering high sensitivity and photostability compared to traditional organic dyes.

  5. Lasers: Due to their high photoluminescence efficiency and tunable emission wavelengths, CdSe quantum dots have been investigated as potential gain media for lasers. They can be used in the development of low-threshold, tunable, and compact lasers.

  6. Thermoelectric devices: CdSe-based materials have been explored for their potential use in thermoelectric devices that convert waste heat into electricity. They can exhibit high thermoelectric performance under certain conditions.

  7. Transparent electronics: CdSe has been studied for its potential use in transparent thin-film transistors, which could find applications in flexible displays, touch screens, and other optoelectronic devices.

Cadmium Selenide (CdSe) Solar Cell Cross-Section View Glass Substrate Transparent Conductive Oxide CdSe Absorber Layer CdS Buffer Layer Metal Back Contact CdSe Quantum Dots Electron-Hole Generation Photon e- h+ Key Features: • Direct bandgap semiconductor (1.74 eV) • Excellent light absorption properties • Quantum dot enhancement possible • Thin-film technology

Above is a structure of a Cadmium Selenide (CdSe) solar cell, which is a type of thin-film photovoltaic technology. The diagram includes:

  1. A cross-sectional view showing the typical layers:
    • Glass substrate on top
    • Transparent conductive oxide (TCO) layer
    • CdSe absorber layer (the active photovoltaic material)
    • CdS buffer layer
    • Metal back contact
  2. An inset showing CdSe quantum dots, which are sometimes used to enhance the efficiency of these solar cells by tuning the bandgap.
  3. A visualization of electron-hole pair generation that occurs when photons strike the CdSe layer.

Key features of CdSe solar cells include:

  • Direct bandgap semiconductor with a bandgap of approximately 1.74 eV
  • Excellent light absorption properties
  • Potential for quantum dot enhancement
  • Thin-film technology allowing for flexible and lightweight designs

CdSe cells are part of the broader category of chalcogenide-based thin-film solar cells and are studied for their potential in cost-effective solar energy conversion.