N-Type vs P-Type Solar Cells in 2026: Which Technology Should You Buy?

The solar industry is in the middle of a technology transition. P-type PERC cells, which dominated the market from 2018-2024, are being rapidly displaced by N-type technologies — primarily TOPCon, with HJT and back-contact designs gaining share in premium segments.

The Fundamental Difference

P-type cells use boron-doped silicon wafers and suffer from light-induced degradation (LID), permanently reducing efficiency by 1-2% in the first year. N-type cells use phosphorus-doped wafers and are inherently LID-free. This single difference accounts for most of the long-term performance gap.

Efficiency and Price Comparison (2026)

P-type PERC: 21.0-21.5% module efficiency, $0.10-0.12/W FOB China. N-type TOPCon: 22.0-22.8% module efficiency with bifacial gain up to 80%, $0.11-0.14/W. HJT: 22.5-23.8% module efficiency with bifacial gain up to 90%, $0.14-0.17/W.

Which Should You Buy?

Utility-scale projects in high-irradiance regions: TOPCon bifacial with single-axis trackers delivers the best LCOE today. Commercial rooftop with limited space: HJT or back-contact for higher power density. Budget-constrained emerging markets: PERC still makes sense, but factor in higher degradation over 25 years.

The Trend is Clear

By 2027, P-type PERC is expected to drop below 20% of global production. If you're building long-term supplier relationships, align with manufacturers who have already transitioned to N-type.