Photovoltaic power generation plays a vital role in the global transition to a green, low-carbon energy structure. As the “heart” of photovoltaic modules, the long-term reliability, conversion efficiency, and service life of solar cells directly determine the profitability of the entire power plant. The unique molecular structure of polyolefin elastomers combines the elasticity of rubber with the processability of plastic. Furthermore, they also offer excellent weather resistance, PID resistance, good insulation, and low water vapor transmission rate. These properties make POE an ideal choice for high-end photovoltaic module encapsulation films.
Photovoltaic-grade Polyolefin Elastomer for Sale in Our Company
| Models | Manufacturers |
| Vistamaxx™ 6102 | ExxonMobil |
| Vistamaxx™ 6202 | ExxonMobil |
| WANSUPER® 9057 | Wanhua |
| WANSUPER® 9147 | Wanhua |
| ENGAGE™ PV 8669 | DOW |
| ENGAGE™ PV 8658 | DOW |
| ENGAGE™ PV 8660 | DOW |
| ENGAGE™ PV 8688 | DOW |
| ENGAGE™ PV 8680 | DOW |
| BetoppTM PV7045 | BeyondPoly |
| BetoppTM PV7200 | BeyondPoly |
| LUCENE™ LC670 | LG |
| LUCENE™ LC673 | LG |
| TAFMER™ DF640 | Mitsui Chemicals |
| TAFMER™ DF641 | Mitsui Chemicals |
The Core Role of POE in Photovoltaic Modules - Encapsulation Films
Photovoltaic modules typically utilize a “sandwich” structure, with the solar cells sandwiched between two layers of encapsulation film (EVA/POE/EPE), bonded to the glass and backsheet through a lamination process. The encapsulation film serves as the “framework” and “protective layer” of the module, and its performance is crucial. POE is primarily used in its film form for encapsulation films.
What are the outstanding properties of POE in photovoltaic modules?
Excellent PID resistance ensures power generation returns.
POE elastomer has a stable molecular structure and contains no polar ester bonds. It possesses excellent dielectric volume resistivity, effectively blocking isolator migration channels and fundamentally suppressing the Potentially Induced Degradation PID phenomenon. Modules encapsulated with POE film can maintain over 95% output power even in harsh environments, significantly ensuring long-term returns for power plant investors.
Extremely low moisture vapor transmission rate safeguards battery life.
Moisture vapor is an invisible killer within photovoltaic modules. Once intruded, it can corrode the cell grids, cause EVA to hydrolyze and yellow, accelerate aging, and even cause internal short circuits. POE material’s extremely low moisture vapor transmission rate effectively slows module aging, extending its service life to 25 or even 30 years.
Excellent weather and aging resistance.
POE is highly resistant to environmental stresses such as UV rays, high temperatures, and humidity. Its molecular chain structure is resistant to breakage and aging, maintaining high light transmittance, adhesive strength, and elasticity over time. This prevents yellowing due to film aging and the resulting impact on light absorption, ensuring stable power generation throughout the module’s lifecycle.
Excellent Mechanical Properties and Processing Compatibility.
POE film exhibits excellent elasticity and toughness, effectively buffering stress during the lamination process and reducing the risk of hidden cracks in the cell. It also exhibits excellent adhesion to materials such as glass and backsheets, and is highly compatible with various cell technologies (such as PERC, TOPCon, and HJT).
Application Trends of POE in the Photovoltaic Industry
Applications of POE were initially focused on double-glass bifacial modules, which require extremely high reliability. With the entry of the N-type photovoltaic technology era (including TOPCon and HJT), demand for POE resin has experienced explosive growth.
N-type cell technology is more sensitive to PID. Consequently, the requirements for PID resistance in encapsulation materials are extremely stringent, making polyolefin elastomerthe nearly exclusive choice.
Currently, mainstream photovoltaic manufacturers generally use POE film or POE-based co-extruded film (EPE) when producing TOPCon modules to ensure that their claimed high efficiency and high reliability can last throughout their life cycle.