Optimizing performance of layer-by-layer processed polymer solar cells

摘要

Layer-by-layer (LL) process has recently been used to fabricate polymer solar cells (PSCs), Power conversion efficiency (PCE) of LL processed PSCs is currently below 4%. In this paper, we fabricated polymer photovoltaic devices with poly(3-hexylthiophene) (P3HT) as donor and indene-C60 bisadduct as acceptor with LL method. By carefully optimizing donor/acceptor layer thickness and related thermal annealing process, PCE of 5.12% was achieved. The device displays open-circuit voltage (Voc) of 0.886 V, short-circuit current density (Jsc) of 8.21 mA/cm2, and fill factor of 70.4%.