Cell Lab 5N (99.999%) Selenium (Se) Pieces — high-purity evaporation material for thin films, X-ray photoconductors, quantum dots, and optical coatings. Ideal for vacuum and E-beam deposition systems.
Cell Lab 5N (99.999%) Selenium (Se) Pieces — high-purity evaporation material for thin films, X-ray photoconductors, quantum dots, and optical coatings. Ideal for vacuum and E-beam deposition systems.

Cell Lab 5N (99.999%) Selenium (Se) Pieces Evaporation Materials [1–3 mm]

Cell Lab 5N (99.999%) Selenium (Se) Pieces Evaporation Materials [1–3 mm] High-Purity Selenium for Thin Film and Photoconductor Applications General Description Cell Lab 5N (99.999%) Selenium (Se) Pieces are high-purity evaporation materials featuring a grey metallic lustre and excellent reactivity...
Vendor: Cell Lab
SKU: ST0055
Product type: Chemicals and Compounds
£289.00
£289.00
Weight: 100g
Subtotal: £289.00
Description
Description
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Cell Lab 5N (99.999%) Selenium (Se) Pieces Evaporation Materials [1–3 mm]

High-Purity Selenium for Thin Film and Photoconductor Applications

General Description

Cell Lab 5N (99.999%) Selenium (Se) Pieces are high-purity evaporation materials featuring a grey metallic lustre and excellent reactivity balance. Selenium is primarily used in thin-film deposition, X-ray photoconductors, quantum dots, and antibacterial coatings.
Its superior purity and fine particle size make it suitable for optical coatings, photovoltaics, and semiconductor device fabrication, ensuring reliable performance in precision vacuum evaporation systems.

This material’s relatively high vapour pressure at low temperatures requires careful handling to prevent cross-contamination in deposition chambers. It is classified as a hazardous material and must be shipped with proper packaging and documentation.

Key Features

  • Ultra-high purity (99.999%) – Ensures low impurity levels for research-grade coating applications.

  • Excellent optical and electronic properties – Ideal for photoconductive and semiconductor thin films.

  • High-temperature stability – Maintains structural integrity during controlled vacuum evaporation.

  • Versatile compatibility – Suitable for W, Mo, or Al₂O₃ crucible and coil configurations.

  • Customisable sizes and packaging – Standard 1–3 mm pieces; bespoke dimensions available upon request.

Technical Specifications

Parameter Specification
Name Selenium
Chemical Formula Se
CAS Number 7782-94-2
Atomic Number 34
Molecular Weight 78.96 g/mol
Color / Appearance Grey Metallic Lustre, Non-metallic
Purity 99.999% (5N)
Thermal Conductivity 0.52 W/m·K
Melting Point 217 °C
Theoretical Density 4.81 g/cm³
Z Ratio 0.864
E-Beam Compatibility Good
Temperature (°C) for Vapour Pressure (Torr)

10⁻⁸: 89 °C

10⁻⁶: 125 °C

10⁻⁴: 170 °C
Thermal Evaporation Techniques

Boat: W, Mo;

Coil: W, Mo;

Basket: W, Mo;

Crucible: Al₂O₃
E-Beam Crucible Liner Material Graphite, Tungsten, Molybdenum

Applications & Industries

  • X-ray Photoconductors – Forms high-sensitivity layers for imaging sensors.

  • Optoelectronics – Used in photoresistors, photodiodes, and optical coatings.

  • Quantum Dot and Semiconductor R&D – Enables fabrication of nanoscale photonic devices.

  • Biomedical Coatings – Provides antibacterial protection on implant surfaces.

  • Glass and Pigment Industry – Applied for colour modification and UV protection.

FAQ

Q1: What is the advantage of using 5N-grade selenium in coating applications?
Its ultra-high purity reduces contamination during vacuum deposition, improving thin-film uniformity and conductivity.

Q2: Can selenium be co-evaporated with other materials?
Yes. Selenium is often co-evaporated with elements such as cadmium, zinc, or tellurium to form compound semiconductors like CdSe or ZnSe.

Q3: What precautions are needed when handling selenium?
Selenium has a high vapour pressure at low temperatures; handle it in a controlled vacuum or inert atmosphere to prevent contamination and oxidation.

Q4: Is special packaging required for shipping?
Yes. Selenium is classified as a hazardous material and must be shipped with proper hazmat packaging and handling procedures.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.