However, desert environments present extreme conditions—including scorching temperatures, intense UV radiation, drastic diurnal temperature fluctuations, and sand erosion—posing severe challenges to the durability and power generation efficiency of PV modules.
Responding to these demands, the groundbreaking desert PV-dedicated encapsulant film launched by Betterial, integrates UVB dynamic-cutoff and customized spectrum adaptation technologies. This innovation effectively blocks short-wave UV radiation detrimental to the passivation layer of N-type cells, enhancing module reliability and power generation efficiency in extreme environments. It injects strong momentum into the implementation of the integrated “Power Generation-Desert Control-Ecological Restoration” model.
Under the harsh desert conditions, traditional encapsulation materials are prone to issues such as yellowing, delamination, and PID failure. Betterial® desert PV-dedicated encapsulant film addresses UV protection challenges for N-type modules with its three breakthrough technological advantages.
1. UV Dynamic Cutoff Technology – precisely blocking harmful spectral bands
Through molecular structure design, a “dynamic hydrogen-bonding network” is engineered within the encapsulant's luminescent material. Upon UV excitation, this triggers a photo-tautomerization–vibrational relaxation mechanism, converting high-energy photons into low-energy states for release. Crucially, this process occurs without generating free radicals, ensuring long-term performance stability under persistent UV irradiation.
Lab data confirms the film achieves >95% blocking rate against ultraviolet radiation below 320nm (UVC+UVB bands), while maintaining >90% transmittance for visible light above 355nm. This ensures maximum preservation of photosynthetically active radiation (PAR) essential for power generation while blocking damaging UV.
2. Tunable Spectral Engineering Solutions – enabling real-time optimization for specific spectral response requirements across PV technologies.
Addressing the divergent UV tolerance thresholds across N-type cell technologies, Betterial has developed multi-band cutoff solutions at 320nm, 330nm, 340nm, and 350nm, enabling cell-specific formulation precision. Taking the flagship 320nm-cutoff
film as an exemplar: it maintains <4% power degradation post UV220 accelerated aging testing, delivering >20% relative yield gain versus conventional encapsulants.
3. Reengineered Polymer Matrix & Additive Formulations – delivering multifunctional defense against multi-stress extremes.
Beyond core UV protection, this encapsulant delivers multi-stress resilience through reengineered polymer blends and advanced additives:
1）Extreme Temperature Endurance
¡ 30% enhanced thermal stability
¡ Delamination-free & ΔYI<1.5 after -40℃↔120℃ thermal cycling (TC900) per IEC 61215
2）Sandstorm-Grade Adhesion
¡ 25% increased glass adhesion strength via specialty silane couplers
¡ DH3000 compliance (85°C/85% RH):
✓ Prevents moisture ingress under 200+ thermal shock cycles
✓ Withstands 9kPa abrasive sand impact (ASTM D968)
3）Desert-Optimized PID Resistance
¡ 99.8% Na⁺ migration suppression
¡ <2% power loss in high-salinity environments (EC>8dS/m):
• 0.003% leakage current @ 1500V bias
• Meets IEC TS 62804-1 PID+ protocol
Betterial® Desert PV Encapsulant Film has secured certification from TÜV Rheinland and CPVT and is now deployed at CPVT's Northwest China Desert Validation Base (40.3°N, 94.5°E) for multi-year field reliability verification.
Moving forward, Betterial will advance desert PV encapsulation R&D to enhance module durability and energy yield in extreme environments. This commitment accelerates solar power expansion into frontier territories, delivering integrated energy-ecology solutions for global sandy, rocky, and barren (SARB) regions.
