Signerski, Ryszard, and Grazyna Jarosz. “Diffusion Length of Singlet Excitons in Copper Phthalocyanine Films”. Photonics Letters of Poland 3, no. 3 (September 29, 2011): pp. 107–109. Accessed December 4, 2024. http://photonics.pl/PLP/index.php/letters/article/view/3-38.