One step facile synthesis of a novel anthanthrone dye-based, dopant-free hole transporting material for efficient and stable perovskite solar cells - Hong,DP; Hayasake,K; Kim,J; Thu,TD; Matsui,H; Manzhos,S; Feron,K; Tokito,S; Watson,T; Tsoi,WC; Motta,N; Durrant,JR; et al. (JOURNAL OF MATERIALS CHEMISTRY C, 2018)