
The OSC device based on a blend of S(TPA-BT-4HT) and [70]PCBM (1:3, w/w) exhibited an Isc of 8.58 mA/cm2, a Voc of 0.85 V, and a FF of 32.7%, corresponding to a PCE of 2.39%, under the illumination of AM.1.5, 100 mW/cm2. The Isc of 8.58 mA/cm2 and PSC of 2.39% are among the highest values for the OSCs based on the solution-processable organic molecules reported so far.
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