Cadmium Telluride (CdTe) Photovoltaic Glass: A Complete Guide

2026-08-14 16:27:11

Cadmium telluride (CdTe) photovoltaic glass — often called power-generating glass — is a building-integrated photovoltaic (BIPV) material that turns ordinary architectural glass into an electricity source. Instead of mounting panels on top of a building, the glass is the building skin: a facade, roof, window, or skylight that also generates power. This guide explains what the product is, how it works, and why it has become a mainstream choice for low-carbon buildings. For the product families and how to choose between them, see our CdTe glass series and selection guide. What Exactly Is CdTe Photovoltaic Glass? At its core, the product is a laminated safety glass unit with a thin-film cadmium telluride solar layer built between the glass plies. The CdTe semiconductor absorbs sunlight and converts it into direct current, while the surrounding glass delivers all the functions you expect from architectural glazing — daylighting, weather protection, insulation, and appearance. Because the solar function is embedded in the glass rather than added as an external module, the result is a single, building-grade component. That is the defining feature of BIPV: the electricity-generating element replaces conventional building materials instead of being bolted onto them. How It Generates Power 1. Sunlight strikes the glass and reaches the CdTe thin-film layer. 2. The CdTe semiconductor converts photons into electrical current. 3. A junction box (integrated or split, back- or side-mounted) collects the DC output. 4. The array is wired to an inverter and connected to the building's power system.  Most products are engineered for a maximum system voltage of 1500V and operate reliably from -40°C to +85°C, passing hail-impact testing and rated to IP67 for environmental protection. Efficiency and Panel Size CdTe thin-film technology is valued for stable performance in real-world conditions. Representative figures from the product range include: • Production-line conversion efficiency: around 16% • Laboratory conversion efficiency: over 20% • Largest single panel area: up to 1.92 m² (e.g., 1600 mm × 1200 mm), with custom large-format splicing available  Unlike crystalline silicon, CdTe performs well in high temperatures and diffuse/low-light conditions — an advantage we explore in the benefits article. Appearance: Color and Transparency You Control A major reason architects specify this glass is design freedom. The range supports: • 300+ standard colors, plus fully customizable patterns and images • Adjustable transparency from 0% (opaque) to 60% light transmission • Large-format decoration, with spliced panels reaching sizes such as 3200 mm × 8200 mm for artistic facades  This lets the same product serve both a solid, marble-like wall and a see-through, colored skylight — simply by changing the configuration. Built as a Building Material, Not Just a Panel Key construction and safety credentials include: • Class A fire rating and Safety Class II • Laminated glass structure (PVB/EVA) for safety and durability • Compliance with PV and building standards such as IEC/EN 61215, IEC/EN 61730, GB/T 29551, and JGJ 102 • International certifications including UL 1703, TÜV, CE, CCC, CQC, and ISO 9001 / 14001 / 45001  Frequently Asked Questions Is CdTe glass the same as a solar panel? Not exactly. A conventional panel is added to a roof; CdTe photovoltaic glass replaces the roof, wall, or window itself, functioning as both building material and generator. Can it be transparent? Yes. Translucent versions offer 10%–60% light transmission, while opaque versions provide a solid, decorative finish — all generating power. Is it safe for buildings? It carries a Class A fire rating, laminated-glass safety construction, and meets recognized international PV and building standards. Talk to a Specialist Every facade, roof, and skylight has different structural, optical, and electrical requirements. For detailed technical parameters, help matching a series to your project, or a quotation, feel free to consult us via email.