Band-gap optimization for improvement Cu(in, Ga)Se2 (CIGS) solar cell. - Dwinanri Egyna; Retno Wigajatri P; Tomy Abuzairi; Nji Raden Poespawati (ICTCE, 2017)

Design of a four-branch optical power splitter using III-nitride semiconductors. - Retno Wigajatri Purnamaningsih; Nyi Raden Poespawati; Elhadj Dogheche (ICTCE, 2017)

Low Cost Perovskite Solar Cell Performance under Ambient Condition. - Nji Raden Poespawati; Andrew Bastian; Elang Aji Defrianto; Michael Hariadi; Tomy Abuzairi; Retno Wigajatri Purnamaningsih (ICFSP, 2018)

Design of $2 times 2$ Multimode Interference Beam Splitter Based on GaN/Si Structure. - Narendra Putra Dipta; Retno Wigajatri Purnamaningsih; Muhammad Raditya Gumelar; Syamsu E. Rijal (ACCC, 2020)