D–π–A-Type Triazatruxene-Based Dopant-Free Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells

1. Igci, C.
2. Paek, S.
3. Rakstys, K.
4. Kanda, H.
5. Shibayama, N.
6. Jankauskas, V.
7. Roldán-Carmona, C.
8. Kim, H.
9. Asiri, A.M.
10. Nazeeruddin, M.K.