JA Solar
JA Solar is a Chinese solar PV manufacturer known for producing solar modules, cells, wafers, and offering large-scale power plant solutions worldwide. The company went public on NASDAQ, later privatized, and relisted on the Shenzhen Stock Exchange in 2019 (Stock Code: 002459)
JA Solar specializes in PV products and solutions, including centralized plants, agrivoltaics, floating solar, and multi-energy systems that integrate solar, wind, and storage. With over 10,000 employees and 16 manufacturing bases, it has maintained strong financial performance and technological innovation, leading to cumulative shipments of nearly 300GW by mid-2025—a top global ranking.
While not a perovskite PV company, JA Solar does have a perovskite interest and has been working on developing its perovskite technology.
Its subsidiary Chengdu Jingxin Mingneng Photovoltaic Technology runs an R&D pilot line for crystalline silicon-perovskite tandem solar cells, and JA Solar has reported 31.27% efficiency for a commercial-sized 210 mm half-cell tandem device and 26.7% for an inverted perovskite cell.
Contact information for JA Solar
No. 8 Building, Nuode Center, No.1 Courtyard
East Auto Museum Road
Fengtai Qu
Beijing Shi
China
New anchoring molecule fixes self-assembled monolayer aggregation, pushing perovskite/silicon tandems to 33.3% efficiency
Researchers from Nanjing University, JA Solar, Chongqing University, Jiangsu New Energy Development Co. and Jiangsu Guoxin Research Institute have designed a new self-assembled monolayer (SAM) additive molecule that fixes a longstanding defect problem at the buried hole-transport interface of inverted perovskite solar cells, enabling a wide-bandgap perovskite cell with a champion power conversion efficiency (PCE) of 23.7% and a perovskite/silicon tandem device that reaches 33.3% (certified at 33.1%), with no measurable PCE loss after 30 days of outdoor operation.
Device configuration illustration and chemical structures of Me and TTA. Image from: Science Advances
In inverted perovskite solar cells, the SAM sitting beneath the perovskite layer governs how well the perovskite crystallizes and how efficiently charge is extracted at that buried interface. The carbazole-based SAM molecule Me-4PACz is widely used for its strong hole-extraction properties, but it tends to self-aggregate when processed from alcoholic solvents, producing uneven coverage with island-like clusters and pinholes. That patchy coverage weakens binding to both the substrate below and the perovskite above, raises interface defect density, and impairs charge transport - a problem that has proven difficult to solve without sacrificing some other aspect of performance.
JA Solar to convert a Yangzhou module line to perovskite tandem production
JA Solar is set to add 0.6 GW/year of perovskite tandem module capacity at its Yangzhou base, after the Management Committee of the Yangzhou Economic and Technological Development Zone published proposed approval opinions on the environmental impact assessment for the project on July 23, 2026.
The project, filed by JA Solar (Yangzhou) New Energy and titled the JA Solar Yangzhou Base Module Technology Upgrade Project, covers the company's existing facilities at No. 1 Jinhui Road and No. 123 Jinshan Road in the development zone, with a total investment of 210 million yuan (around $29 million). The perovskite tandem work is concentrated at the Jinhui Road plant.
China launches new space energy alliances with focus on perovskite and tandem PV
China’s solar and clean energy industry has launched two new industry alliances focused on space-based energy technologies, announced at SNEC 2026 in Shanghai. These developments underline growing interest in combining photovoltaics, energy storage, aerospace technology and satellite infrastructure - with perovskite and tandem solar technologies emerging as key enablers.
The newly launched Space Energy Development Alliance brings together members from the solar, energy storage, hydrogen, computing, charging infrastructure and aerospace sectors. Founding organizations include satellite company GalaxySpace, Kunshan GCL Photovoltaic Materials, the Yangtze River Delta Solar PV Technology Innovation Center, Shanghai Tianfu Interstellar Energy Technology, Shenzhen Aerospace New Source Technology and others. The alliance’s goal is to promote collaboration between the space and renewable energy industries and to support the development of future space-based energy technologies, where next‑generation high‑efficiency PV – including perovskite and tandem architectures – is expected to play an important role.
JA Solar's new perovskite-silicon tandem cell project secures approval
It was recently reported that an R&D project for perovskite/silicon tandem solar cells was approved for JA Solar (Yiwu Jin'ao Heguang New Energy Co., Ltd.).
The total investment in the project reaches 423.754 million yuan (almost US$60 million). The Company plans to build a new R&D center, purchase core R&D equipment such as laser grooving machines, plate-type PECVD, plate-type PVD, and integrated packaging equipment, and match supporting automated systems to advance the R&D progress of high-efficiency perovskite/silicon tandem solar cell technology.
Novel interface engineering method enables 26.7% efficient inverted perovskite solar cells
A research team from Chinese module manufacturer JA Solar has developed an inverted perovskite solar cell based on a multifunctional organic ammonium salt that reportedly reduces non-radiative recombination and improves carrier transportation at the interface between the perovskite absorber and the electron transport layer (ETL).
The team explained that this approach enables dual-site passivation of lead iodide (Pb/I) vacancies, while minimizing steric hindrance and thereby boosting the efficiency of carrier extraction.
