In the course of my research I found that 1,4,7,10 tetra-pheniltetracene crystals also provides fast singlet exciton fission into two triplet ones with energy about 1,2 eV. Sublimed films of this material have good resistance to oxidation.
Pair of publication were issued in Russian academic journals. Unfortunately I have only printed copies of those publications in Optika I Spectroscopia ( Optics and Spectroscopy) and Doklady Academii Nauk SSSR ( Academy of Sciences -Dokladi).
Do you want to have copies of my papers?
Regards
Dr., Prof.
Victor I. Lesin