NOVELTY - Article, comprises: a first electrode; a second electrode; and a photoactive layer (140) present between the first and second electrodes. The photoactive layer comprises an electron donor material and an electron acceptor material, where the electron donor material comprises a first polymer and a second polymer different from the first polymer. The first polymer comprises a first co-monomer repeat unit comprising silacyclopentadithiophene/cyclopentadithiophene moiety, and second co-monomer repeat unit comprising benzothiadiazole moiety. The article is configured as photovoltaic cell (100).    USE - The article is useful as photovoltaic cell (claimed) in transistors, photodetectors (IR detectors), photovoltaic detectors, imaging devices (RGB imaging devices for cameras or medical imaging systems), light emitting diodes (LED) (organic LEDs or IR/near IR LEDs), lasing devices, conversion layers (layers that convert visible emission into IR emission), amplifiers and emitters for telecommunication (dopants for fibers), storage elements (holographic storage elements), and electrochromic devices (electrochromic displays).    ADVANTAGE - The article: has a power conversion efficiency of at least 4% under air mass 1.5 conditions; and can be manufactured easily in an economical manner without sacrificing the charge transfer capability of the photovoltaic layer.    DETAILED DESCRIPTION - Article, comprises: a first electrode; a second electrode; and a photoactive layer (140) between the first and second electrodes. The photoactive layer comprises an electron donor material and an electron acceptor material, where the electron donor material comprises a first polymer and a second polymer different from the first polymer. The first polymer comprises a first co-monomer repeat unit comprising a silacyclopentadithiophene/cyclopentadithiophene moiety and a second co-monomer repeat unit comprising a benzothiadiazole moiety and the second polymer comprises a monomer repeat unit comprising a thiophene moiety. The first polymer has a first band-gap, the second polymer has a second band-gap higher than the first band-gap, and the article is configured as a photovoltaic cell (100).    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of the photovoltaic cell (i.e. article).    Photovoltaic cell (100)    Substrate (120)    Blocking layer (130)    Photoactive layer (140)    Carrier layer (150)