Anhui Huasun Energy Co., Ltd ( "Huasun Energy"), founded in July 2020, is a technological innovation enterprise specialized in the R&D and large-scale manufacturing of ultra-high efficiency N-type silicon heterojunction (HJT) solar wafer, cell and module. In 2023, it was implied that the Company is also working on heterojunction-perovskite tandem solar cells.

As one of the industrial pioneers of heterojunction technology in China, Huasun has delivered over 2GW of HJT products to over 30 countries around the globe. Huasun owns 12GW capacity of high-efficiency HJT products, ranking as the largest HJT manufacturer in the world. The company plans to achieve 40GW HJT capacity by the end of 2025.

In November 2023, Huasun Energy announced a fund raise and plans to develop heterojunction-perovskite tandem solar cells.

Cosmos Innovation relies on its AI platform called Mobius for "revolutionizing the approach to solar and semiconductor process development". The company is trying to speed up the recipe development of perovskite silicon tandem technology by 10x to yield the most efficient solar cells, in a fraction of the time and at a fraction of the cost of conventional methods.

Founded by Vijay Chandrasekhar and Joel Li, Cosmos Innovation is led, advised and supported by experts at the intersection of AI, solar, semiconductors and deep tech. The company has raised funding from investors that include Xora Innovation, an early-stage, deep-tech investment platform of Temasek, a global investment company headquartered in Singapore; Innovation Endeavors; Two Sigma Ventures; DeepMind CEO Demis Hassabis; noted MIT professor Tomaso Poggio, a founder of computational neuroscience; Richard Socher, leading natural language processing (NLP) researcher; and Western Technology Investments, one of the leading venture debt funds in Silicon Valley. 

Quanwei Solar, a subsidiary of the listed company Quanwei Technology, is a provider of solar modules, energy storage, and new energy solutions. It is focused on the residential, commercial, industrial and utility markets. 

It is also simultaneously developing perovskite-related technology. The Company has established a technology development and management platform, focusing on cutting-edge solar technologies such as HJT and perovskite. The company has brought together more than 50 top R&D talents in the industry, established reliability and testing analysis laboratories, as well as five R&D centers for new materials, new equipment, new products, HJT, and perovskite. Using various effective technological optimization paths, QW SOLAR continues to improve the conversion efficiency of its cells and modules.

Quanwei has been developing silver paste, ultra-thin silicon wafers, OBB, and other technologies based on HJT cells to further reduce costs. At the same time, It is also conducting industrialization-oriented R&D and developing perovskite/HJT shingled cell technology. In the future, it will engage in extensive cooperation and strategic planning around this technology. 

Red Solar Flower (RSF) is an Israel-based company based on technology and a patent developed in the perovskite solar lab at the Hebrew University in Jerusalem. The company aims for the agrovoltaics sector, developing a semi-transparent, perovskite-based solar panel that provides a synergetic and profitable dual-use solution.

Through a printing-like technique, RSF solar panels are made by applying sub-micron layers on a substrate. RSF's patented application harnesses the unique properties of perovskite composition to create semi-transparent solar panels that transfer the light essential for photosynthesis. Unlike state-of-the-art PV panels, RSF synergetic solution ensures crops get vital sunlight while the solar panels convert sunlight into electricity.

RSF’s patented perovskite-based solar panel transfers only the wavelengths required for photosynthesis while utilizing the rest of the spectrum for power generation, thereby enabling 100% coverage of the growing area while maintaining the light conditions required for plant growth.

Founded in 2000, LONGi Green Energy Technology Co., Ltd. (LONGi) is a solar technology that develops solutions for large-scale power plants and for different industries and households with its innovation-focused development. Eventually, it also plans to supply "Green Power + Green Hydrogen" solutions for global zero-carbon development.

Since 2015, LONGi has located its operations in Yunnan, China, and Kuching, Malaysia, to utilize the abundant local hydropower resources to provide clean energy for its facilities. LONGi plans to integrate solar power plants with pumped storage in areas that feature significant elevation differences and abundant sunlight, creating an industrial model for using solar. 

On its website, LONGi states that "the LONGi R&D team has achieved successive breakthroughs in key technologies. These include perovskite thin-film crystal growth on textured silicon substrates, high-efficiency bulk passivation and optical management, and these advancements have led to rapid improvements in the efficiency of silicon-based stacked cells".

Founded in Eugene, Oregon and established in 2009, Grape Solar is a retail solar brand with over a decade of experience providing grid-tied, grid-interactive and off-grid solar systems to businesses and individuals. 

In September 2023, it was announced that Grape Solar appointed Dr. Leon Dong to Spearhead R&D Effort of Perovskite Solar Technology, as the Company is entering the field of perovskite solar R&D.

Solertix is a start-up specialized in perovskite solar cells research and upscaling for industrial applications.

Solertix is based in Italy, and is a spinoff of the University of Rome Tor Vergata. It was created under the Organic Solar Center (CHOSE).

Solertix is working on printable, efficient and flexible perovskite solar technology.

At the end of My 2023, Solertix was acquired by FuturaSun.

Beyond Silicon focuses on bifacial perovskite/silicon tandem cells. The Company aims to achieve  30% more power compared to existing silicon cells and have the cells serve as a drop-in replacement for silicon PV module manufacturing.

Beyond Silicon was founded by Arizona State University  alums Zachary Holman and Zhengshan Yu.

Founded in 1999, First Solar is an American solar technology company and global provider of responsibly produced, eco-efficient solar modules advancing the fight against climate change.

 The company is a U.S-headquartered company and does not manufacture in China. First Solar’s advanced thin film photovoltaic (PV) modules represent the next generation of solar technologies, providing a competitive, high-performance, lower-carbon alternative to conventional crystalline silicon (c-Si) PV panels.

In May 2023, First Solar acquired Evolar.

Beijing Yaoneng Technology Co., Ltd. was registered in Beijing (Haidian) Overseas Students Pioneer Park in 2017, and has obtained the Zhongguancun high-tech enterprise qualification. Its main business is in the field of new energy materials, and the research and development products are devices, processes and materials for perovskite/crystalline silicon tandem solar cells and modules. 

It is the earliest domestic enterprise dedicated to the industrialization of perovskite crystalline silicon tandem solar cells.