Comment on 'Roles of donor and acceptor nanodomains in 6% efficient thermally annealed polymer photovoltaics' [Appl. Phys. Lett. 90, 163511 (2007)]

摘要

In a recent letter, Kim et al. reported on a 6.1% efficient polymer photovoltaic cell. The reported 6.1 % efficiency under standard reference conditions (25 ℃, 1000 W m~(-2) total irradiance, IEC 60904 global reference spectrum).is not consistent with the device's reported quantum efficiency (QE). The 6.1% claim comes from Fig. 3 for cell D2. The short-circuit current density J_(sc) for this cell is not reported. However, digitizing the data in Fig. 3 yields a J_(sc) of 15.42±0.05 mA/cm~2. Assuming the QE in Fig. 2(C) at 297 K corresponds to the QE of cell D2, then this QE integrates to 8.40 mA/cm~2 with a maximum QE of 61.8%.