Masaya Ando, Shinya Kato, Naoki Kishi, and Tetsuo Soga. “Fabrication and Characterization of DSSC/Si Tandem Solar Cell With PEDOT:PSS/ITO Buffer Layer”. Journal of Solar Energy Research Updates 7 (January 20, 2020):  7–11. Accessed July 2, 2025. https://www.zealpress.com/index.php/jseru/article/view/36.