Rahmawati, Saparudin, Teuku Andi Fadly. English Effect of Activated Variations Carbon from Oil Palm Empty Fruit Bunch to Solar Cell Efficiency p-n Junction Layer Cu2O-TiO2. JI [Internet]. 2020May14 [cited 2026Apr.23];5(1):44-9. Available from: https://inotera.poltas.ac.id/index.php/inotera/article/view/99