The 6th International School on Hybrid, Organic and Perovskite Photovoltaics (HOPE-PV 2025) organized by Zhengzhou Research Institute of Harbin Institute of Technology was held in Zhengzhou, Henan Province, China on 17 - 21 November 2025. Plenary and Invited lectures were delivered by leading researchers in the field of perovskite and organic photovoltaics from different provinces of China, Russia, USA, Japan, Switzerland, Austria, Germany, Italy, Denmark, Kazakhstan, Poland, Singapore and Brazil. An invited lecture about triphenylamine-based organic semiconductors and their application in organic and hybrid optoelectronics was delivered by dIrector of ISPM RAS, corresponding member of the Russian Academy of Sciences, Dr. Sergey Ponomarenko. The school included a competition for the best oral and poster presentation among the young scientists, the event was held in a warm and friendly atmosphere.