An optoelectronic device comprising: a substrate; a plurality of semiconductor units electrically connected with each other and disposed jointly on the substrate, wherein each semiconductor unit comprises a first semiconductor layer, a second semiconductor layer, and an active region interposed between thereof; a plurality of first electrodes disposed on each first semiconductor layer respectively; and a plurality of second electrodes disposed on each second semiconductor layer respectively, wherein at least one of the first electrodes comprises a first extension, and at least one of the second electrodes comprises a second extension, wherein at least one of the first extension and the second extension comprises a curve which is not parallel to the edge of the semiconductor units.