Influence of the intermediate density-of-states occupancy on open-circuit voltage of bulk heterojunction solar cells with different fullerene acceptors

1. Garcia-Belmonte, G.
2. Boix, P.P.
3. Bisquert, J.
4. Lenes, M.
5. Bolink, H.J.
6. La Rosa, A.
7. Filippone, S.
8. Martín, N.