Non-Planar and Flexible Hole-Transporting Materials from Bis-Xanthene and Bis-Thioxanthene Units for Perovskite Solar Cells

1. Urieta-Mora, J.
2. García-Benito, I.
3. Zimmermann, I.
4. Aragó, J.
5. García-Fernández, P.D.
6. Grancini, G.
7. Molina-Ontoria, A.
8. Ortí, E.
9. Martín, N.
10. Nazeeruddin, M.K.