Table 2. Photovoltaic parameters of the triple-junction cells and the constituent subcells.
| Material combination | Devices | VOC (V) | FF (%) | JSC (mA cm−2) | PCE (%) | RS (Ω cm2) |
|---|---|---|---|---|---|---|
| DPP–DPP/PCDTBT | Bottom DPP–DPP subcell | 1.08 | 64.2 | 6.00 | 4.16 | 8.03 |
| Top PCDTBT subcell | 0.82 | 54.9 | 3.70 | 1.66 | 1.15 | |
| Triple connection | 0.89 | 63.1 | 9.67 | 5.43 | 1.04 | |
| DPP–DPP/OPV12 | Bottom DPP–DPP subcell | 1.07 | 60.7 | 5.95 | 3.86 | 7.14 |
| Top OPV12 subcell | 0.77 | 67.8 | 3.58 | 1.87 | 0.82 | |
| Triple connection | 0.82 | 68.4 | 9.55 | 5.35 | 0.71 |
DPP, pDPP5T-2; PCE, power conversion efficiency.
RS of the cells were calculated at ∼2 V of the J–V curves measured in dark.