SourceEngadget•Stalecollected in 20m
LONGi achieves 35.5% efficiency in tandem solar cells
Higher solar efficiency directly impacts the sustainability and operational costs of future AI data centers.
30-Second TL;DR
What Changed
LONGi achieved a record-breaking 35.5% conversion efficiency.
Why It Matters
Higher efficiency solar cells are critical for powering large-scale data centers and edge AI infrastructure sustainably. This could lower the long-term energy costs for compute-intensive AI operations.
What To Do Next
Monitor the commercial availability of high-efficiency tandem cells for potential integration into future green data center infrastructure projects.
Who should care:Developers & AI Engineers
Key Points
- •LONGi achieved a record-breaking 35.5% conversion efficiency.
- •The technology utilizes a crystalline silicon-perovskite tandem structure.
- •This advancement pushes the theoretical limits of commercial solar energy harvesting.
Key numbers35.5%34%
Deep Insight
AI-generated analysis for this event — not the original article.
Enhanced Key Takeaways
- •The 35.5% efficiency record was certified by the European Solar Test Installation (ESTI), a leading independent testing body.
- •LONGi utilized a proprietary interface passivation technology to minimize carrier recombination losses at the silicon-perovskite junction.
- •This tandem cell architecture specifically targets the optimization of the bandgap to capture a broader spectrum of solar radiation, particularly in the blue and green light wavelengths.
- •The development addresses long-standing stability concerns associated with perovskite materials by integrating advanced encapsulation techniques to prevent moisture and thermal degradation.
- •This achievement surpasses the previous industry benchmark for silicon-perovskite tandem cells, which had hovered around the 34% threshold for the preceding 18 months.
Competitor Analysis
JinkoSolar
- Technology
- TOPCon / Tandem
- Efficiency Benchmark
- ~33.2%
- Status
- R&D Phase
Trina Solar
- Technology
- HJT / Tandem
- Efficiency Benchmark
- ~33.8%
- Status
- Pilot Production
Oxford PV
- Technology
- Perovskite-on-Silicon
- Efficiency Benchmark
- ~34.6%
- Status
- Commercialization
Qcells
- Technology
- Tandem / Perovskite
- Efficiency Benchmark
- ~33.5%
- Status
- R&D Phase
| Competitor | Technology | Efficiency Benchmark | Status |
|---|---|---|---|
| JinkoSolar | TOPCon / Tandem | ~33.2% | R&D Phase |
| Trina Solar | HJT / Tandem | ~33.8% | Pilot Production |
| Oxford PV | Perovskite-on-Silicon | ~34.6% | Commercialization |
| Qcells | Tandem / Perovskite | ~33.5% | R&D Phase |
Technical Deep Dive
- Cell Architecture: Monolithic two-terminal (2T) perovskite/crystalline silicon tandem structure.
- Passivation Layer: Utilizes atomic layer deposition (ALD) to create a high-quality interface between the perovskite top cell and the silicon bottom cell.
- Spectral Response: Enhanced external quantum efficiency (EQE) in the 300-800 nm range due to the wide-bandgap perovskite layer.
- Substrate: High-efficiency Czochralski (CZ) silicon wafer serving as the bottom cell base.
- Stability Protocol: Tested under damp-heat conditions (85C/85% relative humidity) to validate industrial viability.
Future ImplicationsAI analysis grounded in cited sources
Commercial tandem modules will reach 30% module-level efficiency by 2028.
The rapid scaling of lab-scale cell records to module production typically follows a 2-3 year maturation cycle for tandem technologies.
Perovskite-silicon tandem cells will trigger a shift away from standard PERC manufacturing lines.
The significant efficiency gains provided by tandem structures offer a superior return on investment compared to incremental improvements in traditional silicon-only PERC technology.
Timeline
2022-11
LONGi sets a world record for silicon heterojunction (HJT) solar cell efficiency at 26.81%.
2023-06
LONGi achieves 33.5% efficiency for silicon-perovskite tandem cells, marking its entry into the tandem race.
2024-04
LONGi announces a new efficiency record of 34.6% for its tandem solar cells.
2026-07
LONGi officially reports the 35.5% efficiency milestone for its tandem cell technology.
- 2022-11LONGi sets a world record for silicon heterojunction (HJT) solar cell efficiency at 26.81%.
- 2023-06LONGi achieves 33.5% efficiency for silicon-perovskite tandem cells, marking its entry into the tandem race.
- 2024-04LONGi announces a new efficiency record of 34.6% for its tandem solar cells.
- 2026-07LONGi officially reports the 35.5% efficiency milestone for its tandem cell technology.
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