LONGi’s paper on silicon-perovskite tandem cells in Nature
Vertically integrated solar manufacturer LONGi Green Energy has published a research paper titled “Perovskite-silicon tandem solar cells with bilayer interface passivation” in the science journal Nature. The study reveals breakthroughs in tandem solar cell technology that surpass the efficiency limits of single-junction solar cells. LONGi developed a patented technology featuring an asymmetrical textured silicon heterojunction (HJT) solar cell. The front surface is micro-textured to facilitate the solution-based fabrication of perovskite layers, while the back surface features standard large textures to improve rear-side passivation and infrared response. This innovation led to a record-breaking 33.9% certified conversion efficiency for the perovskite/silicon tandem cell. LONGi says that this is the first time in solar cell history that tandem cell efficiency has experimentally exceeded the Shockley-Queisser (S-Q) theoretical limit for single-junction cells.
Recently, LONGi announced winning 3 awards at the 10th All Quality Matters Solar & ESS Congress, organized by the TÜV Rheinland Group (see China Solar PV News Snippets).
Guangdong OneSolar achieves 30.41% all-perovskite tandem cell efficiency
Guangdong OneSolar Technology Co., Ltd., a subsidiary of Guangdong Runshihua Holding Group, and Prof. Jinhui Tong's team from the National Key Laboratory of New Materials Composite Technology of Wuhan University of Technology, have developed an all-perovskite tandem solar cell, which was certified by CPVT with a conversion efficiency of 30.41%. The company says it is the world's highest efficiency for an all-perovskite tandem cell and the world's highest certified efficiency for low-cost thin-film PV cells.
Qinghong Laser delivers GW-class laser scribing equipment
Qinghong Laser's first GW-level perovskite laser scribing equipment was successfully delivered to BOE. The equipment shipped this time includes P1/P2/P3 and other laser scribing equipment, which can process 1,200 mm x 2,400 mm large-format GW-level perovskite cells. The company claims this is the first time that GW-level laser scribing equipment has been delivered in China and the industry.
China launches 1st desert sand-to-PV sand production line
China has started trial production on what it calls the ‘first’ production line that converts desert sand into PV sand. Operated by China National Building Material Group Corporation (CNBM) subsidiary Tongliao Silicon Sand Industry Co., Ltd., the plant is located in the Horqin Left Rear Banner, Tongliao City, Inner Mongolia. Built for a total investment of RMB 200 million ($28.11 million), the plant has been designed to produce 300,000 tons of PV sand and 200,000 tons of low-iron feldspar annually, using flotation technology to purify high-silica sand. The trial production has achieved a silica purity greater than 99.5% and iron oxide content below 0.01% (100 ppm), meeting the criteria for PV sand. According to the local authorities, the Horqin Left Rear Banner area has verified silica sand reserves of 35 billion tons.
Jiayu Holding involved in lawsuits totaling over RMB 3 billion
Solar module manufacturer Jiayu Holding Co., Ltd. has announced that between September 2020 and September 6, 2024, the company and its subsidiaries were involved in 1,679 lawsuits as defendants, for a total amount of RMB 3.087 billion ($433.86 million). In August of this year, Jiayu Group, Jiayu Holding's controlling shareholder with a 38.01% stake, has filed for bankruptcy due to its inability to repay maturing debts. Jiayu Group holds a 38.01% stake in Jiayu Holding.
.png?w=50&fm=png){kind=logo}