Improved performance of inverted polymer solar cells using pentacene

Abstract

SUMMARYWe investigated the role of pentacene in inverted polymer solar cells based on the blends of poly(3-hexylthiophene) (P3HT), (6,6)-phenyl C 61 -butyric acid methyl ester (PCBM), and pentacene. The performance of organic solar cells with pentacene improved in terms of power conversion efficiency (PCE), thermal stability, and lifetime in the ambient air. The pentacene in the P3HT:PCBM blends modified the crystallization of P3HT and PCBM. The donor-acceptor interface of devices with pentacene was found to be more stable than that without pentacene in the active layer, which was characterized by optical microscopy, atomic force microscopy and ultraviolet-visible absorption spectra. The PCE of pentacene based as-fabricated device was 4.3%, and the PCE of non-encapsulated pentacene device reduced just by about 25% after 4 months.

Nonfullerene organic photovoltaic cells exhibiting 13.76% efficiency by employing upside‐down solvent vapor annealing

“…[1][2][3][4][5][6][7][8] Evolution of nonfullerene acceptor particularly plays a vital role for achieving highperformance OPVs. [1][2][3][4][5][6][7][8] Evolution of nonfullerene acceptor particularly plays a vital role for achieving highperformance OPVs.…”

“…Organic photovoltaic cells (OPVs) with bulkheterojunction structure have achieved significant progress, benefiting from the continuous material development and device optimization. [1][2][3][4][5][6][7][8] Evolution of nonfullerene acceptor particularly plays a vital role for achieving highperformance OPVs. Compared with traditional fullerene acceptors such as PC 61 BM or PC 71 BM, nonfullerene acceptors exhibit excellent optical absorption properties, easily tunable molecular energy levels, and potential for processing OPVs with low voltage loss.…”