LONGi Commits $28M to 100MW Silicon-Perovskite Tandem Pilot Line in China, Validating 35.5% World Record Efficiency

August 17, 2026

Perovskite-Info China

Overview

LONGi Green Energy is investing 204 million yuan ($28 million) to establish a 100 MW pilot production line for high-efficiency silicon-perovskite tandem solar cells in Xixian New Area, Shaanxi Province, China. This initiative will leverage LONGi’s recently certified world record of 35.5% conversion efficiency for two-terminal silicon-perovskite tandem cells, moving the technology from laboratory achievement to pilot-scale manufacturing. The project signifies a critical step towards commercializing advanced perovskite technology, aiming to accelerate its market deployment and enhance renewable energy capabilities.

In Depth

Key Findings

LONGi Green Energy has announced a significant investment of 204 million yuan (approximately $28 million USD) to construct a 100 MW pilot production line for high-efficiency silicon-perovskite tandem solar cells in Xixian New Area, Shaanxi Province, China. This strategic move aims to translate LONGi’s recently certified world record of 35.5% power conversion efficiency for two-terminal silicon-perovskite tandem cells, verified by the U.S. National Renewable Energy Laboratory (NREL), into a viable commercial manufacturing process.

Technical and Manufacturing Details

The pilot line will integrate advanced equipment for perovskite thin-film deposition and rapid crystallization within existing factory infrastructure. This approach is designed to optimize the manufacturing process for large-scale application while maintaining high efficiency.
Perovskite-silicon tandem cells represent a next-generation solar technology where a perovskite layer is stacked atop a conventional silicon cell. This configuration enables the capture of a broader spectrum of sunlight, pushing combined efficiencies significantly beyond the theoretical limits of single-junction silicon cells.
LONGi has a history of setting efficiency benchmarks, including 26.81% for silicon heterojunction cells and 33.5% certified by ESTI for tandem cells, underscoring its robust R&D capabilities.

Background and Context

The global solar industry is in a continuous pursuit of higher efficiency and lower manufacturing costs. Perovskite solar cell technology has emerged as a frontrunner due to its exceptional power conversion efficiency potential and solution-processable manufacturing advantages. The tandem configuration with silicon is particularly attractive as it allows for an incremental upgrade to existing silicon PV infrastructure, offering a practical pathway to enhanced performance without necessitating a complete overhaul of established manufacturing processes. This commercialization push by a major player like LONGi indicates a maturing of the technology from research to industrial readiness.

Strategic Significance and Outlook

The establishment of this 100 MW pilot line is a strong indicator of LONGi’s commitment to leading the next wave of solar energy innovation. By successfully scaling up production, the company aims to reduce the levelized cost of electricity (LCOE) and make high-efficiency solar modules more accessible. This development will not only solidify China’s position in advanced solar manufacturing but also contribute significantly to global renewable energy targets by introducing more efficient and potentially cost-effective solar solutions. Successful deployment of such a line could pave the way for gigawatt-scale production, fundamentally altering the competitive landscape of the solar PV market.

Source: https://www.perovskite-info.com/longi-build-100-mw-silicon-perovskite-tandem-pilot-production-line-shaanxi

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