Recently, Prof. Wang Jinliang from the School of Chemistry at Beijing Institute of Technology joined with Prof. Wu Hongbin from South China University of Technology and Dr. Liu Feng from the Lawrence National Laboratory of Berkeley in the United States. Using fluorobenzothiadiazole as an electron-deficient unit, IDT ) As an electron-rich unit, an oligomeric material of bixtythiophene as a capping unit, and an organic solar cell device that is blended with a fullerene derivative to obtain a photoelectric conversion efficiency of up to 9.1% and a fill factor of up to 0.77. Hydraulic Shop Press,Hydraulic Power Press,Hydraulic Bearing Press,Four-Column Hydraulic Press Wuxi DALI Hydraulic Machinery Factory , https://www.hydraumatic.com