A novel solution-processable electron acceptor 6,6'-(5,5'-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(thiophene-5,2-diyl))bis(2,5-bis(2-ethylhexyl)-3-(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione) (DPP1) based on fluorene and diketopyrrolopyrrole conjugated moieties was designed, synthesized and characterized completely. DPP1 exhibited excellent solubility and high thermal stability which are essential for easy processing. Upon using DPP1 acceptor with the classical electron donor poly(3-hexylthiophene), solution processable bulk-heterojunction solar cells afforded 1.2% power conversion efficiency with a high open-circuit voltage (1.1 V). As per our knowledge, the value of open circuit voltage is one of the highest values reported so far for a bulk-heterojunction device using DPP1 non-fullerene acceptor.