Group 1 - China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. applied for a patent for "Perovskite Solar Cells with Reconstructed Interfaces and Their Preparation Method" on May 2025, with publication number CN120475881A [1] - The patent describes a preparation method for perovskite solar cells, which includes multiple steps such as providing a conductive substrate, preparing an electron transport layer, and forming a reconstructed layer on the perovskite light-absorbing layer [1] Group 2 - China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. was established in 2010, located in Beijing, with a registered capital of 1,337.57 million RMB [2] - The company has invested in 12 enterprises, participated in 4,347 bidding projects, and holds 5,000 patent information records [2] - Huaneng Qinghai Power Generation Co., Ltd. was established in 2014, located in Xining, with a registered capital of 2,210.86 million RMB [2] - This company has invested in 5 enterprises, participated in 1,246 bidding projects, and holds 115 patent information records [2]