Applications / Solar PV
Solar Photovoltaic Quartz
High-purity fused silica for solar cell manufacturing
CZ and DS crucibles, diffusion tubes, wafer boats, PECVD components and custom quartzware — supporting crystal growth through cell processing for PERC, TOPCon, HJT and related high-efficiency lines. Thermal stability, low metallic contamination and dimensional consistency for high-volume production. Engineering quote within 24 business hours.
CZ crucibles
12″–32″
Wafer formats
M10 · G12
Cell tech
TOPCon · HJT
1 pc
Minimum custom prototype
Since 2005
Solar & semiconductor supply
CZ · DS
Crystal growth crucibles
15 000 m²
ISO 9001 plant, Lianyungang
High volume
Cost-effective production life
Why quartz in PV
From melt to cell — silicon lives inside fused silica
High-purity fused silica is foundational across the solar value chain. From the moment polysilicon is melted to grow an ingot, through diffusion, deposition and etching, silicon is held, carried and processed inside quartz components.
Solar-grade silicon is processed above 1000 °C in many steps — crucible melting above 1414 °C, diffusion at 800–900 °C, oxidation at 900–1000 °C. Quartz is the practical material that combines thermal stability under those loads, chemical inertness to process gases and wet chemistries, and purity low enough to avoid transition-metal contamination that creates recombination centres and cuts cell efficiency.
As the industry moves from PERC to TOPCon, HJT and tandem architectures, demands on quartz tighten: larger wafers (M10 to G12), higher slot density, more aggressive boron chemistry on TOPCon lines, and tighter contamination control for tunnel-oxide and poly-Si steps.
Purity
Protect minority-carrier lifetime
Metallic impurities — especially Fe, Cu, Ni — create recombination centres. High-purity fused silica keeps contamination out of the melt and off the wafer during diffusion and deposition.
Throughput
Survive high-volume cycles
Excellent thermal-shock resistance and dimensional stability under continuous thermal load support long service life on cost-sensitive, high-throughput PV lines.
Product range
Solar photovoltaic quartz components
Crucibles for crystal growth, diffusion tubes and boats for emitter formation, PECVD hardware, handling parts and fully custom quartzware for next-generation cell lines.
Crystal growth
Quartz Crucibles
High-purity crucibles for Czochralski (CZ), magnetic CZ (MCZ) and directional solidification (DS). Monocrystalline and multicrystalline ingot growth. Excellent thermal stability and low melt contamination.
CZ: 12″–32″ (300–800 mm) · DS: G5–G8
Emitter formation
Diffusion & Process Tubes
Process tubes for phosphorus and boron diffusion furnaces. Uniform temperature distribution, long service life and compatibility with high-volume POCl₃ / BCl₃ lines including TOPCon boron diffusion.
Use: POCl₃ · BCl₃ / BBr₃ · oxidation · anneal
Wafer carrier
Solar Wafer Boats
Precision boats for diffusion, oxidation and annealing. Slot design and pitch optimized for solar wafer sizes — high density, low particle generation and uniform heating under continuous production load.
Formats: M2 · M4 · M6 · M10 · G12 · half-cell
Passivation / ARC
PECVD & Deposition Components
Quartz parts for plasma-enhanced CVD systems depositing anti-reflection coatings and passivation layers. Carriers, liners, bell jars and fixtures matched to equipment platforms.
Also: LPCVD tube liners for poly-Si / tunnel oxide steps
Load / unload
Push Paddles & Handling
Quartz push paddles, support rods and handling components for loading and unloading boats in horizontal and vertical furnace systems. Often supplied as part of a matched tube–boat–paddle set.
Scope: Paddles · rods · end supports · custom fixtures
Build-to-print
Custom Solar Quartz
Fully custom fused silica parts to drawing or reverse-engineered from samples — for new furnace platforms, specialized processes and high-efficiency cell technologies including TOPCon and HJT thermal steps.
Input: DXF · STEP · IGES · sample for reverse engineering
Value chain
Quartz across the solar manufacturing chain
From polysilicon melt to finished cell, the same material family serves different roles — only geometry, grade and duty cycle change.
Silicon crystal growth
Quartz crucibles melt polysilicon and grow monocrystalline (CZ/MCZ) or multicrystalline (DS) ingots. Crucible purity and thermal performance directly influence crystal quality, oxygen content and yield.
Wafer diffusion
High-temperature diffusion furnaces introduce dopants to form the emitter. Process tubes and wafer boats must maintain purity and dimensional stability through continuous production cycles — including more aggressive boron chemistry on TOPCon lines.
PECVD & surface passivation
Anti-reflection coatings and passivation layers are deposited in PECVD systems. Quartz carriers and chamber components support clean, high-temperature processing. LPCVD steps for tunnel oxide and poly-Si add further demand on tube and boat cleanliness.
Annealing & thermal treatment
Additional thermal steps for defect annealing and contact formation rely on quartz boats and support structures for uniform heating and low contamination under high-throughput load.
Formats & sizes
Wafer boats and crucibles sized for modern lines
Solar wafer formats and crucible diameters track the industry shift to larger, higher-efficiency cells. We produce across current production standards and transition formats.
Wafer boats
M2 · M4 · M6 · M10 · G12 · half-cell
Straight-slot and V-groove profiles. Standard and extended boat lengths. High-density and back-to-back loading options for TOPCon throughput.
Crucibles
CZ 12″–32″ · DS G5–G8
Single-pull and continuous-feed CZ configurations. Non-standard dimensions to customer drawing for specific puller thermal profiles.
Next-gen cells
TOPCon, HJT and beyond
Advanced architectures increase the number of high-temperature steps and the purity demand on quartzware.
TOPCon
Tube furnace hardware for tunnel-oxide growth and LPCVD polysilicon deposition. Process tubes and carriers for n-type wafers. Boron diffusion chemistry is more aggressive on quartz than phosphorus — boat and tube life planning should reflect that.
HJT
Quartz carrier plates and tray components for PECVD deposition chambers. Lower process temperature than TOPCon diffusion, but cleanliness and dimensional fit to the tool remain critical.
Custom / tandem
When standard products do not exist for a new process step, we produce prototype and production quartz from customer drawings.
Key advantages
SiO₂ purity≥ 99.99 %
Metallic contamination controlHigh
Thermal shock resistanceExcellent
Continuous thermal load stabilityYes
Service life under high volumeLong
Process compatibilityCZ · DS · diffusion · PECVD
Custom geometryDrawing or sample
Fabrication
Crucible, tube and boat under one roof
Solar quartzware is produced in the same 15 000 m² ISO 9001 facility as semiconductor and optical products. Crucible forming, tube drawing, CNC boat machining, flame forming and annealing stay under one quality system.
01 · Crucible & tube production
Controlled wall thickness and thermal performance for crystal growth and diffusion.
02 · CNC precision machining
Wafer boats, paddles and fixtures with accurate slot geometry and tight tolerances.
03 · Flame forming & annealing
Complex assemblies, flanged tubes and specialized components — stress-relieved for thermal cycling.
FAQ
Questions crystal growers and cell makers actually ask
TOPCon/HJT support, wafer formats, crucible sizes, product scope and why quartz is essential. If the answer is not here, put it on the RFQ.
Yes. FGQuartz supplies quartz tube furnace hardware for TOPCon tunnel oxide growth and LPCVD polysilicon deposition, including process tubes and wafer carrier designs appropriate for n-type silicon wafers. For HJT cell lines, quartz carrier plates and tray components for PECVD deposition chambers are available. For novel process equipment where standard quartz products do not exist, FGQuartz’s custom fabrication capability produces prototype and production quartz components from customer drawings. FGQuartz has been supplying components to TOPCon technology development programmes since their early commercial phases.
FGQuartz produces wafer boats for M2 (156 mm), M4 (161.7 mm), M6 (166 mm), M10 (182 mm), G12 (210 mm), and rectangular formats used in half-cell manufacturing. Both straight-slot and V-groove slot profiles are available across all wafer sizes. Standard and extended boat lengths are produced to accommodate different tube furnace loading configurations. For cell manufacturers running multiple wafer formats on shared tube furnace equipment during a format transition, FGQuartz produces boats for all formats from the same facility with consistent delivery scheduling.
FGQuartz manufactures CZ crucibles in the standard diameter range from 12-inch (300 mm) through 32-inch (800 mm) formats, covering the full range of crystal pullers used in solar silicon production from small research pullers to large-diameter production systems. Both single-pull crucibles and continuous-feed CZ (CF-CZ) configurations are available. DS crucibles are produced in G5, G6, G7, and G8 standard sizes. Non-standard crucible dimensions for specific furnace configurations are produced to customer drawings or dimension specifications.
FGQuartz supplies CZ crucibles in 12-inch to 32-inch diameters; DS crucibles in G5 through G8 sizes; phosphorus diffusion tubes and boron process tubes for solar cell tube furnaces; wafer boats and carriers for M10, G12, and other wafer formats; PECVD bell jars and LPCVD tube liners for passivation and anti-reflection deposition; furnace liners in clear and opaque grades; quartz paddles and push rods; wet process tanks; Siemens reactor bell jars and electrode sleeves for polysilicon production; and custom quartz components for TOPCon, HJT, and tandem cell process equipment.
Solar-grade silicon is produced and processed at temperatures above 1000°C across many steps — crucible melting above 1414°C, diffusion at 800–900°C, oxidation at 900–1000°C. Quartz glass is the only practical material that combines thermal stability to survive these conditions, chemical inertness to resist the aggressive chemistries involved, and purity to avoid introducing transition metal contamination that would create carrier recombination centres in the silicon and reduce solar cell efficiency. No other affordable material provides this combination of properties across the full range of solar manufacturing process temperatures.
RFQ
Source solar PV quartz for your process
Tell us process (crystal growth, diffusion, PECVD or other), equipment platform, wafer size or crucible diameter, and required components. DXF, STEP, IGES, a dimensioned sketch or a sample for reverse engineering are enough to start. Prototype quantity: one piece.
- Quote within 24 business hours
- File formats: DXF, STEP, IGES, PDF
- CZ / DS crucibles · diffusion tubes · M10 / G12 boats
- TOPCon · HJT · PERC compatible designs
- Prototype through high-volume production
