A. Z. Djennati, et al. “HTL Material Variation of Graphene ITO TiO2 MAPbI3 Spiro-OMeTAD Solar Cells under High Temperature Effect”. International Journal of Nanoelectronics and Materials (IJNeaM) , vol. 17, no. 3, Aug. 2024, pp. 446-51, doi:10.58915/ijneam.v17i3.1167.