Perovskite Film Blade Coater

Engineered for Perovskite Solar Cells (PSCs) and Advanced Optoelectronic Thin Film R&D

The "Perovskite Film 200H Blade Coater" combines high-precision drive control, a dual-adjustable air-knife assisted drying system, and a hard-anodized mirror-polished heating vacuum suction stage. It effectively addresses key challenges in perovskite precursor crystallization dynamics and film non-uniformity, making it the premier coating machine choice for research teams and industrial pilot evaluation.

Product Overview

In the manufacturing of perovskite solar cells and next-generation thin film devices, the stability and film-forming dynamics of the coating machine are critical factors in determining Power Conversion Efficiency (PCE).

The Perovskite Film 200H Blade Coater is specifically designed to eliminate the major pain points of traditional spin coating—namely high material waste and the inability to scale to larger substrate areas. Equipped with a 4.3-inch full-color touchscreen digital interface, supporting 100 customizable 5-step program profiles, combined with 1–50 mm/s precise speed regulation and a heating vacuum stage with ≤ ±2%thermal uniformity, the 200H ensures every perovskite wet film achieves nanometer-level smoothness and highly reproducible crystallization.

Core Features

* High-Precision Substrate Drive & Speed Control: Offers a 1–50 mm/s coating speed range with a speed control accuracy of 1 mm/s, maintaining stable wet film shear rates and effectively suppressing coating striations and coffee-ring effects.

* Dual-Adjustable Air-Knife System: Features adjustable air-knife angles from -45° to +45° and a vertical height adjustment range of 10–35 mm, enabling rapid solvent evaporation and solvent-assisted crystallization.

* Heating Vacuum Suction Stage: Features a hard-anodized mirror-finish aluminum panel with an A4-sized vacuum suction area (0.06–0.09 MPa), combined with ambient to 200°C temperature control and 1–10°C/min ramp rates for *in-situ* thermal annealing.

* Versatile Coating Tool Compatibility: Optional micrometer adjustable blade, four-sided applicator, and wire bars accommodate varying solution viscosities and coating process requirements.

* Smart Program Control Interface: 4.3-inch full-color touchscreen with 100 programmable 5-step profiles allows automated multi-stage speed transitions and coordinated air-knife blowing cycles.

International Testing Standards

Perovskite thin films and solar cell devices produced using the 200H blade coater comply with key international quality and reliability standards:

IEC 61215 / IEC 61646: Terrestrial thin-film photovoltaic (PV) modules – Design qualification and type approval (thermal cycling, damp heat testing).

ASTM D3359: Standard Test Methods for Rating Adhesion by Tape Test.

ISO 2808: Paints and varnishes — Determination of film thickness (micro- and nano-scale thin film thickness measurements).

ASTM F1249: Standard Test Method for Water Vapor Transmission Rate (WVTR) through flexible barrier materials.

Applications & Target Industries

The 200H blade coater is widely applied across advanced materials R&D, optoelectronic device fabrication, and functional polymer thin film processing:

1. Perovskite Solar Cells (PSCs):

* Large-area blade coating of single-junction and perovskite/silicon tandem solar cells.

* Uniform coating of Charge Transport Layers (ETL/HTL, e.g., NiOx, Spiro-OMeTAD, PEDOT:PSS) and perovskite absorber layers.

2. Organic Photovoltaics (OPV) & Organic Photodetectors (OPD):

* Solution-processed active layer deposition across scalable areas.

3. Perovskite Light-Emitting Diodes (PeLED) & OLEDs:

* High-uniformity luminescent thin film deposition.

4. Flexible & Printed Electronics:

* Coating of conductive polymers, metal meshes, and transparent conductive oxides (TCO).

5. Solid-State Batteries & Lithium-Ion Components:

* Deposition of solid electrolytes, separator coatings, and electrode films.

Ordering Information

Flexible standard packages and customizable options are available to meet specific laboratory needs:

Standard Package

200H Main Unit + Heating Vacuum Suction Stage + Dual-Adjustable Air-Knife System + Oil-Free Vacuum Pump.

Optional Accessories

* Micrometer Adjustable Film Applicator Blade

* Four-Sided Applicator

* High-Precision Wire Bars (Metering Rods)

* Inquiries & Technical Support: Contact ACTTR engineering team for customized quotes, substrate testing, or sample trial runs.

Technical Insights

Film Crystallization Dynamics & Key Advantages of 200H

(Designed for perovskite process engineers and researchers seeking scalable, high-efficiency thin film coating solutions)

Transitioning from lab-scale spin coating to scalable blade coater processing presents a core challenge: controlling liquid-phase film drying kinetics and supersaturation nucleation rates.

1. Landau-Levich Coating Regime and Precise Thickness Control

The wet film thickness (ℏ) during blade coating operates within the Landau-Levich regime, governed by solution viscosity  (η), coating speed  (ν), and surface tension  (γ) :

With its 1 mm/s speed adjustment precision (range: 1–50 mm/s), the 200H allows researchers to precisely target the ideal Landau-Levich region or Evaporation region, yielding highly reproducible, pinhole-free perovskite thin films with minimal grain boundary defects.

2. Air-Knife Assisted Rapid Crystallization

Perovskite precursor solutions (e.g., PbI2 and MAI/FAI in DMF/DMSO) have high boiling points and low volatility. Unassisted drying leads to uncontrolled crystallization, poor film coverage, and large pinholes.

The integrated air-knife system in the 200H addresses this directly:

* Angle Adjustment (-45° to +45°): Directs airflow to remove solvent vapors rapidly, driving precursor supersaturation and triggering immediate, uniform nucleation.

* Vertical Height Adjustment (10–35 mm): Fine-tunes wind shear stress to promote rapid crystallization without disturbing the wet film surface topography.

3. Synergistic In-Situ Thermal Annealing & Vacuum Fixation

Following nucleation, grain growth requires consistent thermal energy. The 200H features an integrated **ambient to 200°C heated vacuum stage** with thermal uniformity of ≤ ±2%:

1. Vacuum Suction: Securely holds rigid glass (ITO/FTO) or flexible substrates, preventing thermal warping or displacement during coating.

2. In-Situ Thermal Annealing: Accelerates the transition from intermediate phases to the highly conductive perovskite black phase (e.g., α-CsPbI3 or α-FAPbI3) immediately after coating, enhancing crystallinity and carrier lifetimes.

Frequently Asked Questions (FAQ)

Q1: What is a blade coater, and why is it ideal for perovskite thin film deposition?

A1: A blade coater is an automated coating machine that uses a precision blade or rod to spread liquid precursor solution evenly across a substrate. Unlike spin coating, which wastes over 90% of precursor solution and cannot scale to large areas, blade coating achieves near-100% material utilization, enables continuous large-area deposition, and integrates smoothly into Roll-to-Roll (R2R) industrial production line workflows.

Q2: What role does the air-knife play in perovskite coating on the 200H?

A2: Air-knife assisted drying is a core mechanism for regulating perovskite crystallization. The 200H features -45° to +45° angle adjustment and 10–35 mm height adjustment. By directing precise air flow across the fresh wet film, the air-knife removes volatile solvent vapors quickly, boosting precursor supersaturation to induce rapid, uniform nucleation. This eliminates pinholes and yields dense, high-efficiency perovskite thin films.

Q3: How do you control perovskite thin film thickness and uniformity with the 200H?

A3: Film thickness is determined by coating speed (1–50 mm/s), blade gap, solution viscosity, and evaporation rate. The 200H provides 1 mm/s speed control precision to maintain stable operation in the Landau-Levich regime. Combined with a vacuum heating stage featuring ≤ ±2% thermal uniformity, the system eliminates edge effects and drying streaks.

Q4: Besides perovskite solar cells (PSCs), what other thin film applications suit the 200H?

A4: Beyond perovskite absorber and transport layers (ETL/HTL), the 200H is widely used for:

• Active layers in Organic Photovoltaics (OPV) and Organic Photodetectors (OPD).
• Emissive thin films in Perovskite LEDs (PeLEDs) and OLEDs.
• Solid electrolyte films and electrode coatings for Solid-State Batteries.
• Transparent conductive oxides (TCO) and polymer coatings for Flexible Electronics.

Q5: What coating accessories and automated features does the 200H offer?

A5: The 200H includes versatile hardware and automation options:

• Tool Compatibility: Accommodates micrometer adjustable blades, four-sided applicators, or wire bars depending on viscosity requirements.
• Smart Program Control: The 4.3-inch touchscreen supports up to 100 multi-step program profiles (5 steps per program) to automate multi-stage coating speeds, heating cycles, and air-knife timing seamlessly.