Vlachopoulos, Nick, Jinbao Zhang, and Anders Hagfeldt. “Dye-Sensitized Solar Cells: New Approaches With Organic Solid-State Hole Conductors”. CHIMIA 69, no. 1-2 (February 25, 2015): 41. Accessed April 4, 2025. https://www.chimia.ch/chimia/article/view/2015_041.