Adnan Alam KHAN. Development of High Efficiency Multi-Crystalline Inorganic Solar Cell Using Er+3 Based Plano Convex Lens. New Visions in Science and Technology Vol. 6, [S. l.], p. 27–34, 2021. DOI: 10.9734/bpi/nvst/v6/13512D. Disponível em: https://stm.bookpi.org/NVST-V6/article/view/4132. Acesso em: 4 jun. 2026.